3AH47 Vacuum circuit-breaker 17.5 kv - 16.7 Hz and 27.5 kv - 50/60 Hz OPERATING INSTRUCTIONS Siemens AG 1996. All rights reserved. Order no.: 9229 9947 176 0C Ordering location: IC LMV LP PO P C41 AG 03.2013 en Siemens Parts
For your safety Signal terms and definitions Hazards are classified in accordance with ISO 3864-2 using the following keywords: DANGER, WARNING or CAUTION, where there is a risk of personal injury NOTE, where there is a risk of material damage. Hazards are classified and indicated in the operating instructions and on the vacuum circuit-breaker as follows: DANGER signal word used to indicate an imminently hazardous situation which, if not avoided, will result in death or serious injury. WARNING signal word used to indicate a potentially hazardous situation which, if not avoided, could result in death or serious injury. CAUTION signal word used to indicate a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. Note indicates a potentially damaging situation. If the damaging situation is not avoided, the product or something in its vicinity may sustain damage. Qualified personnel Product liability are, for the purposes of this manual or the warning indication on the vacuum circuitbreaker, persons who are familiar with the transport, storage, placement, assembly, commissioning, operation and maintenance of the product and have the qualifications corresponding to their activity, such as: training and authorisation to energize, de-energize, clear, ground and tag circuits and equipment in accordance with established safety practices. training in the proper care and use of protective equipment in accordance with established safety practices; training in providing first aid. Note Product liability claims are upheld only if the replacement of the purchased spare parts is performed by personnel that has been trained and certified by Siemens. 2 9229 9947 176 0C
Table of contents For your safety... 2 Transport, storage and packing... 5 Transport... 5 Unpacking (I)... 6 Unpacking (II)... 10 Reusing the transport unit... 12 Storage... 12 General information... 13 Range of application... 13 Standards... 14 Design approval as per X-Ray Ordinance... 14 Scope of delivery... 14 Description... 15 Design... 15 Interlocking devices... 29 Rating plate... 31 Technical data... 31 Ambient conditions... 32 Installation altitudes... 32 Switching times... 33 Circuit diagrams... 34 Installation... 39 Attachment in the switching cubicle... 39 Earthing... 41 Electrical connection of the prime conductor... 43 Operation... 45 Commissioning... 45 First closing operation... 46 Closing... 47 Opening... 47 Maintenance... 49 Maintenance and servicing... 49 Maintenance plan... 50 Vacuum interrupter service life... 54 Accessories and spare parts... 54 Manufacturer's product liability... 55 Disposal... 55 Service... 55 Index of keywords... 57 Legend for all pages... 59 Note Sections with Addendum (I) or (II) Sections with Addendum (I) are about the standard equipment. Sections with Addendum (II) relate only to vacuum circuit-breakers with two vacuum-interrupters connected in series. If no addendum is given, the information is applicable for all 3AH47 vacuum circuit-breakers. Siemens Parts 9229 9947 176 0C 3
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Transport, storage and packing Transport, storage and packing Transport WARNING Heavy transport weight Transport unit may fall and fail and sling gear may break. Use means of lifting, transporting and sling gear suited to the requirements and load-carrying capacity. Observe transport symbols. Transport weight Refer to the delivery slip for the weight of the transport unit. Note Observe stacking height For transport, not more than three constructionally identical transport units must be piled on top of each other. Observe loads specified on the transport unit. Note Secure load For transport secure load in such a way that the transport unit is not at risk. Place the transport unit on a level, non-slip and pressure-resistant surface for intermediate storage. Transport vacuum circuit-breaker in the original transport unit up until installation site or storage location. Transport with crane or fork lift Fig. 1 Transporting the pallet with carton (I) Fig. 2 Transporting the pallet (II) Siemens Parts 9229 9947 176 0C 5
Transport, storage and packing Transport with packing Checking the transport unit Transport the transport unit to the installation site or storage location with a fork lift or with sling gear suspended from a crane - at an angle of twist of approx. 60 or - with a spreader bar. After receipt of delivery: Check transport unit for damage; Major damage must be documented photographically. Ensure that any damage to the transport unit is confirmed by the transport company. Unpacking (I) Working equipment Required tools: - Knife/scissors - Lifting equipment with lifting gear - Pliers or lever CAUTION Danger of injury from sharp edges! Fasteners may break, leaving sharp edges. Always use a suitable tool to lever out fasteners. Note Do not cut open or damage carton, since it is designed to be reused and because of the belt straps located underneath. Belt straps could be severed on the pallet floor when cutting open the carton. The vacuum circuit-breaker is attached to the pallet with belt straps. It is not possible to transport the vacuum circuit-breaker on the pallet without using belt straps (see Fig. 5). Fig. 3 Removing the carton 6 9229 9947 176 0C
Transport, storage and packing Opening the transport unit Place the transport unit on a level, non-slip and pressure-resistant surface. Remove lifting gear or transport means. Remove plastic wrap. Lever out fasteners from the carton and lift off carton. Note Do not use the vacuum circuit-breaker if parts are broken, i.e. if you find cracks, flakings, bent metal parts, damaged plug-in contacts, tears or bare cables. Send it back in its original transport unit (see Reusing the transport unit, page 12). Note Carrying straps may scrape along the vacuum circuit-breaker and damage it. If necessary, cover carrying straps with edge protection. Select length and position of the carrying straps so that the pole heads are not compressed. Fig. 4 Removing the foil Fig. 5 Transport with pallet possible Remove foil. Check delivery for completeness. Check vacuum circuit-breaker for damage. If the vacuum circuit-breaker is damaged, ship it back in the transport unit (see Reusing the transport unit, page 12). Transport with pallet, without carton The vacuum circuit-breaker can be transported with the pallet, without the carton. Thread carrying belts under the pallet or Transport with fork lift. Siemens Parts 9229 9947 176 0C 7
Transport, storage and packing Note When fastening the eyebolts to the pole heads, ensure that the contact surfaces are not damaged. Fig. 6 Removing the tensioning belts Fig. 7 Screwing in eye bolts and lifting the vacuum circuit-breaker Transport without pallet Remove all tensioning belts and bits of fastening wood. Remove accessory pack, if applicable, and store safely in the packaging for later attachment. Screw suitable eye bolts into the pole heads. Hang sling gear into the eyebolts. Carefully lift vacuum circuit-breaker off the pallet just enough that pieces of square timber can be placed underneath. Note Place pieces of square timber onto the pallet in such a way that the insulating operating rods, contact pressure springs, angle levers and dashpots are not damaged when setting down. 8 9229 9947 176 0C
Transport, storage and packing Fig. 8 Positioning the square timbers and setting down the vacuum circuit-breaker Fig. 9 Transporting without pallet Set the vacuum circuit-breaker down onto the square timbers. Hang further sling gear into the transport boreholes. Transport to installation site or suspended from crane for further work steps. Note Keep accessory pack on hand for the installation. Siemens Parts 9229 9947 176 0C 9
Transport, storage and packing Working equipment Unpacking (II) Required tools: - Knife/scissors - Lifting equipment with lifting gear. Note Do not use the vacuum circuit-breaker if parts are broken, i.e. if you find cracks, flakings, bent metal parts, damaged plug-in contacts, tears or bare cables. Send it back in its original transport unit (see Reusing the transport unit, page 12). Fig. 10 Removing foil Fig. 11 Removing tensioning belts and bits of fastening wood Opening the transport unit Place the transport unit on a level, non-slip and pressure-resistant surface. Remove lifting gear or transport means. Remove foil. Check the vacuum circuit-breaker for damage. Remove all tensioning belts and bits of fastening wood. Fig. 12 Removing squared timber Fig. 13 Lifting Remove timber between pole plate and beam. Hook crane hooks into the openings on the mechanism box. Carefully lift vacuum circuit-breaker. 10 9229 9947 176 0C
Transport, storage and packing CAUTION Crushing hazard! The vacuum circuit-breaker can tip during lifting and crush hands. Do not reach between pole head and beam. Reposition the vacuum circuit-breaker. Wear helmet and gloves. Note The vacuum circuit-breaker has a tilted transport position because the centre of gravity is situated outside of the mechanism box. Fig. 14 Positioning and lifting Fig. 15 Transport position Transport to the installation site Grab the vacuum circuit-breaker on the pole head with both hands. Position the pole plate on the rear end of the beam. Lift the vacuum circuit-breaker with lifting gear and both hands and guide into the transport position. Transport to installation site or leave suspended from crane for further work steps. Note Keep accessory pack on hand for the installation. Siemens Parts 9229 9947 176 0C 11
Transport, storage and packing Reusing the transport unit Reusing the transport unit To transport the vacuum circuit-breaker again, the pallet with carton or the case with the most components can be reused. Do not reuse severed tensioning straps or plastic wrap. Pack the vacuum circuit-breaker in reverse order: Attach the vacuum circuit-breaker safely to the pallet using the appropriate tools. Cover with foil and seal with adhesive tape. Attach accessories pack. Attach carton securely to the pallet base. Screw the wooden case back together. Before returning to the factory, ask the responsible Siemens representative for a returned goods number (see also Service, on page 55). When returning a vacuum circuit-breaker, always indicate the type and serial number (see Rating plate, on page 31). Storage Note Store the vacuum circuit-breaker in the following condition: OPEN position Closing spring relaxed Note Risk of corrosion damage if stored improperly! If the storage conditions listed below are met, the vacuum circuit-breaker can be stored for up to a year in its transport unit. If the storage conditions are not met, the vacuum circuit-breaker cannot be stored in the transport unit any longer than 6 months. If storage of longer than one year is planned, unpack the vacuum circuit-breaker from the transport unit. Further storage may necessitate fresh corrosion protection, and it must be ensured that the vacuum circuit-breaker cannot be damaged. Storage room Transport unit Storage time Temperature range Comments Number of units per stack Enclosed, dry, well ventilated and as free from dust as possible, with a relative humidity of less than 60 %. unopened unopened max. 6months max. 1year open * over 1year 5 C to +40 C 40 C to +55 C max. 4 5 C to +40 C max. 4 if necessary with new corrosion protection * without carton 12 9229 9947 176 0C
General information General information WARNING Dangerous voltage and mechanical movements When operating electrical devices, certain parts will always be live, and mechanical parts may move very quickly, even when remotely controlled. If the warnings are not observed, serious injury or damage to material may be the result. Only personnel with the relevant qualifications may work on or in the vicinity of this device. This personnel must be familiar with all the warnings and servicing measures specified in these operating instructions. Smooth and safe operation of this device requires proper transport and storage, and professional installation and assembly as well as careful operation and maintenance. The basic version and all listed configurations of the vacuum circuit-breakers are type-tested devices as per IEC. Note In the event of subsequent attachments or fittings, e. g. locking parts in connection with switchgear, ensure that fast moving parts are not additionally loaded by masses or forces and additional parts are sufficiently far away especially from moving and live parts. If vacuum circuit-breakers are to be equipped with additional functions by the customer, we recommend consulting the factory, since tried and tested solutions are frequently available (see also Additional equipment, on page 19). Intended use Range of application 3AH47 vacuum circuit-breakers are one-pole or two-pole interior circuit-breakers for a rated voltage of 17.5 kv - 27.5 kv. 3AH47 vacuum circuit-breakers can handle up to 60 000 operating cycles if the maintenance schedule is observed. 3AH47 vacuum circuit-breakers are suitable for switching any type of alternating current circuits under normal operating conditions, such as: Three-phase motors for reversing, turning and direct operation Transformers Capacitors Resistor consumers Suitable for high frequency of operation and unlimited on-time. 3AH47 vacuum circuit-breakers operate in continuous, periodic and short-time operation. Siemens Parts 9229 9947 176 0C 13
General information Standards The 3AH47 vacuum circuit-breakers comply with the regulations: IEC 62271-100 IEC 62271-1 IEC (DIN EN) 60265-1 All 3AH47 vacuum circuit-breakers comply with the specifications for C2-, E2- and M2-class circuit-breakers in accordance with IEC 62271-100. Design approval as per X-Ray Ordinance The vacuum interrupters installed in the vacuum circuit-breakers are of a design approved under the X-Ray Ordinance (RöV) of the Federal Republic of Germany. They meet the requirements of RöV of 8 January 1987 (BGbl. I, page 114) 8 and Annex II No. 5 up to the level of the rated voltage stipulated according to DIN VDE/IEC. Scope of delivery Delivery includes: 3AH47 vacuum circuit-breaker Hand crank for circuit-breaker 3AX 1530-2B (optional) Operating instructions + unpacking instructions Circuit-breaker-specific circuit diagrams 14 9229 9947 176 0C
Description Description Design The 3AH47 vacuum circuit-breakers differ in their outer design: One-pole with two vacuum interrupters arranged one above the other One-pole with a vacuum interrupter Two-pole with one vacuum interrupter per pole The basic design as well as the operating mechanisms are the same for all types of construction. Vacuum circuit-breaker The 3AH47 vacuum circuit-breaker consists of the mechanism box (60.), the pole assembly (19.) with vacuum interrupter (30.), the cast resin post insulators (16.1 and 16.2) with reinforcing struts (28.) the insulating operating rods (48.) with contact pressure springs (49.) required for contact actuation. Each pole assembly (19.) is carried by the cast resin post insulators (16.1 and 16.2) that are screwed to the pole plate (15.). Fig. 16 Side view 15. Pole plate 30. Vacuum interrupter 16.1 Upper post insulator 48. Insulating operating rod 16.2 Lower post insulator 49. Contact pressure spring 19. Pole assembly, complete 60. Mechanism box 28. Strut Siemens Parts 9229 9947 176 0C 15
Description Pole assembly The pole assembly (19.) of the 3AH47 vacuum circuit-breaker consists of the upper interrupter support (20.) with the upper terminal (27.) of the vacuum interrupter (30.); the lower interrupter support (40.) with the lower terminal (29.) and the clamp (29.2) with flexible connector (29.1); as well as the angle lever (48.6.). The centering (28.1) and the struts (28.) relieve the vacuum interrupters of external forces. Fig. 17 Pole assembly 3AH47 84 Fig. 18 Pole assembly 3AH47 57 19. Pole assembly 30. Vacuum interrupter 20. Upper interrupter support 38. Grading capacitor 27. Upper terminal 39. Pole gearing 28. Strut 39.1 Bearing block 28.1 Centering 40. Lower interrupter support 29. Lower terminal 48.6 Angle lever 29.1 Flexible connector 49. Contact pressure spring 29.2 Clamp 16 9229 9947 176 0C
Description Contact system in the vacuum interrupters A slight change in the contact stroke that occurs over the entire useful life of the vacuum interrupter has no effect on its function. There is no need for a status indicator for the contact system. Mechanism box The mechanism box (60.) contains all the electrical and mechanical components required to switch the vacuum circuit-breaker on or off. Insulating operating rods (48.) transfer the switching movement to the pole assemblies. The mechanism box is closed with a removable cover (60.1). Fig. 19 Operating and indicator elements 50.1 Opening for hand crank 58. Operating cycle counter 51. Rating plate 59. Contact position indicator CLOSED-OPEN 53. CLOSED pushbutton 60.1 Cover 54. OPEN pushbutton a) Tightening torque Md = 10 Nm 55. Spring state indicator Functions Indicators There are openings in the cover (60.1) for the operating and indicator elements. The CLOSED pushbutton (53.) is used to close the vacuum circuit-breaker. The motor (50.4) immediately charges the closing spring (62.). If the supply voltage for the motor fails, the closing spring can be charged with a hand crank (50.). There is an opening (50.1) for this in the cover, behind which you will find the hand crank coupling (50.5) of the gear unit (50.2). The OPEN pushbutton (54.) is used to open the vacuum circuit-breaker. The charged state of the springs is indicated via the spring state indicator (55.). The position indicating device (59.) shows the CLOSED or OPEN state. The operating cycle counter (58.) indicates the number of operating cycles. An operating cycle consists of one closing and one opening. The rating plate (51.) is attached to the mechanism box and readable through an opening (51.1) in the cover. Siemens Parts 9229 9947 176 0C 17
Description Fig. 20 Opened mechanism box 50.2 Gear unit 59. Contact position indicator CLOSED-OPEN 50.4 Motor M1 60. Mechanism box 50.4.1 Position switch 61. Dashpot 50.5 Hand crank coupling 62. Closing spring 51. Rating plate 63. Circuit-breaker shaft 53.1 Closing solenoid Y9 64. Opening spring 54.1 Shunt release Y1 66. Closing damper 54.2 Shunt release Y2 or 68. Auxiliary switch S1 Instantaneous release H83 Opt. Y2 68.1 Operating rod (for auxiliary switch S1) 54.3 Transformer-operated releases Y4, Y5 68.7 Low-voltage interface X0 54.4 Undervoltage release Y7 69. Contactor relay K1 54.5 Transformer-operated release (0.1 70. Earth terminal Ws) Y6 55. Spring state indicator 71. Heater (condensation water protection) 58. Operating cycle counter 18 9229 9947 176 0C
Description Basic equipment Equipment The basic equipment of the 3AH47 vacuum circuit-breaker contains: Motor (M1) Contactor relay (electrical anti-pumping device) (K1) Closing solenoid (Y9) Shunt release (Y1) Auxiliary switch (optional) (S1) 6NO + 6NC 12NO + 12NC Position switch for signal "Closing spring charged" (S41, S42) Circuit-breaker tripping signal, cut-out switch (S6, S7) Low-voltage interface (optional) X0 Plug-connector with sleeve housing 64-pin Plug-connector with sleeve housing 24-pin Terminal strip Operating cycle counter Mechanical anti-pumping device Mechanical manual closing and opening Additional equipment Every 3AH47 vacuum circuit-breaker can be fitted with the following equipment: Shunt release 1) 3AX1101 (Y2, Y3) Transformer-operated release 3AX1102 1) (Y4, Y5) Transformer-operated release 3AX1104 (0.1 AC) 1) (Y6) Undervoltage release 3AX1103 1) (Y7) Instantaneous release H83 Opt. 3AX601 (Y2) Heater (condensation water protection) 1) Mechanical interlock 1) Electric manual closing 2) Priority opening 2) 1) Subsequent installation possible 2) No subsequent installation possible In addition to the serial shunt release (Y1), the vacuum circuit-breaker can be equipped with a maximum of 2 releases of the type 3AX11. For the permitted possible combinations of the additional equipment as well as special designs, refer to catalogue HG11, or contact the responsible Siemens representative. Siemens Parts 9229 9947 176 0C 19
Description Motor (M1) After the supply voltage is applied and if the closing spring is relaxed, the motor starts immediately and is automatically deactivated internally after charging has taken place. Power consumption, maximum: in the event of direct voltage approx. 750 W in the event of alternating voltage approx. 1400 VA. In the short charging time, the motor sometimes operates in the overload range. See Fig. 22 for the rated voltage for the required motor short-circuit protection. Note: The motor protection devices are not included in the delivery of the vacuum circuit-breaker and must be ordered separately. Fig. 21 Motor (50.4) Rated supply voltage U* ) V DC 24 DC 48 DC 60 DC 110 AC 50/60 Hz 110 DC 220 AC 50/60 Hz 230 Recommended rated current of the protective device I** ) A 16 10 6 4 6 2 3 *) The operator's supply voltage may deviate from the rated supply voltage of the vacuum circuit-breaker by -15 % to +10 %. **) Built-in automatic circuit-breaker with C characteristic Fig. 22 Recommendation for motor protection device Contactor relay K1 If simultaneous CLOSE and OPEN commands are continuously applied to the vacuum circuit-breaker, it returns to the open position after being closed. Via the function of the contactor relay K1, the vacuum circuit-breaker pauses there until the CLOSE command is given again. This prevents continuous closing and opening (pumping). Fig. 23 Contactor relay (69.) 20 9229 9947 176 0C
Closing solenoid (Y9) 3AY1510 Description The closing solenoid Y9 unlatches the charged closing spring and switches the vacuum circuit-breaker on electrically. It is available for DC or AC voltage. The closing solenoid Y9 is not designed for continuous operation and is automatically deactivated within the circuit-breaker. The operator's supply voltage may deviate from the rated supply voltage of the vacuum circuit-breaker by 15 % to +10 %. The closing solenoid Y9 can be operated using AC or DC voltage and is protected against overvoltage. Power consumption is approximately 140 W / VA Fig. 24 Closing solenoid (53.1) 1st shunt release (Y1) 3AY1510 In the case of the 1st shunt release Y1, the electrically fed tripping pulse is passed to the "OPEN" latch by means of a directly acting magnet armature, thus switching off the vacuum circuit-breaker. The 1st shunt release Y1 is not designed for continuous operation and is automatically deactivated within the circuit-breaker. The operator's supply voltage may deviate from the rated supply voltage of the vacuum circuit-breaker by 30 % to +10 % in the event of DC voltage and by 15 % to +10 % in the event of AC voltage. The 1st shunt release Y1 can be operated using AC or DC voltage and is protected against overvoltage. Power consumption is approximately 140 W / VA Fig. 25 1st shunt release (54.1) Siemens Parts 9229 9947 176 0C 21
Description Auxiliary switch S1 Three versions of the auxiliary switch S1 are available for delivery: with 6 or 12 NO / NC contacts each. Rated insulation voltage: 250 V AC/DC Insulation group: C as per VDE 0110 Continuous current: 10 A Closing capacity: 50 A Fig. 26 Auxiliary switch (68.) Breaking capacity AC 40 to 60 Hz DC Operating voltage Operating current Operating voltage Operating current U (V) I (A) U (V) I (A) Ohmic load Inductive load (T = 20 ms) 24 10 10 48 10 9 Up to 230 10 60 9 7 110 5 4 220 2.5 2 Fig. 27 Breaking capacity of the auxiliary switch 3SV92 22 9229 9947 176 0C
Description Position switch S21, S22 Position switches (switch off the motor after charging) S3 Position switch (opens when closing spring is charged) S41, S42 Position switches (report charging state) Fig. 28 Position switch (50.4.1) Circuit-breaker tripping signal, cut-out switch (S6, S7) The position switch S6 makes contact briefly when the vacuum circuit-breaker is opened by means of an electrical release. This contacting can be used for a signal. In the event of intentional mechanical opening, the cutout switch S7 interrupts the contacting. Fig. 29 Circuit-breaker tripping signal Siemens Parts 9229 9947 176 0C 23
Description Low-voltage interface X0, 64-pin Fig. 30 Low-voltage interface X0 Fig. 31 Terminal strip (optional) Terminal strip (optional) For connection of the control line, the standard version of the vacuum circuitbreakers are equipped with a 64-pin low-voltage interface X0 (68.7). The 64-pin plug (68.7.1) for the external terminal, is suitable for crimp termination of control lines with a nominal cross-section of 1.5 mm 2. Instead of the 64-pin plug (68.7.1), a terminal strip (68.7.2) can be ordered as interface to the terminal at the customer's site. Assignment of the terminals is done according to the circuit diagram supplied. 24 9229 9947 176 0C
Description A further shunt release, transformer-operated release, undervoltage release or instantaneous release can be installed as a 2nd release. 2nd shunt release (Y2) 3AX1101 The second shunt release Y2 is installed whenever more than one shunt release is needed. In this version, the electrical off command is passed by means of a magnet armature to the "OPENING" latch by release of an energy storage mechanism, thus switching off the vacuum circuit-breaker. This tripping solenoid is not designed for continuous operation. Any necessary varistors and rectifiers are integrated in the release. Power consumption is approximately 60 W / VA Fig. 32 2nd Shunt release (54.2) Transformer-operated releases (Y4, Y5) 3AX1102, (Y6) 3AX1104 The transformer-operated releases Y4, Y5 or Y6 consist of an energy storage mechanism, an unlatching fixture and an electromagnetic system. If the tripping current is exceeded (90 % of the transformer-operated release's rated current), the stored energy mechanism is unlatched, thus initiating opening of the circuit-breaker. For use of the transformer-operated release, matching transformers are also needed for matching, in addition to the main current transformers. Power consumption for 0.5 A and 1 A 6 VA at 90 % of the transformer-operated release's rated current and with open armature. Fig. 33 Transformer-operated releases (54.3) Siemens Parts 9229 9947 176 0C 25
Description Undervoltage release (Y7) 3AX1103 Note The undervoltage release Y7 must only be operated with the supplied series resistor R1. Note For switching operations (mechanical or electrical), the undervoltage release 3AX1103 must be connected to control voltage, as otherwise closing is not possible. The undervoltage release Y7 has an electromagnet system that has voltage permanently applied to it when the vacuum circuit-breaker is in the closed state. If the voltage drops below a certain value, the undervoltage release Y7 is unlatched, thus initiating opening of the vacuum circuit-breaker via the stored energy mechanism. Random tripping of the undervoltage release Y7 is generally performed by an NC contact in the tripping circuit, but can also be done with the aid of an NO contact by short-circuiting the solenoid coil. In the case of this latter method, the solenoid coil's short-circuit current is limited by the built-in resistor. The undervoltage release Y7 can also be connected to voltage transformers. The undervoltage release Y7 automatically trips the vacuum circuit-breaker if the rated supply voltage drops to an inadmissible value. Any necessary varistors and rectifiers are integrated in the release. Power consumption 6.5 W or 7.5 VA R1 resistor S1 auxiliary switch Y7 undervoltage release Fig. 34 Undervoltage release (54.4) Fig. 35 Typical circuit for connection of the undervoltage release Y7 26 9229 9947 176 0C
Description Closing time Break time Instantaneous release H83 Opt. (Y2) 3AX601 The instantaneous release H83 Opt. is a protection relay and was specially developed for use in vacuum circuit-breakers with 16 2 / 3 Hz for rail applications, in order to achieve the shortest possible break time. Since the arcing time in rail networks is three times longer, the use of a special protection relay together with the rapid release is intended to produce a statistical short-circuit cut-off already after a half-wave. Due to its type of construction and the materials used, it has an extremely short operating time of < 10 ms, at a very small magnet stroke of 2.5 mm. For use in the 3AH47 vacuum circuit-breaker a dynamic method of working is therefore selected: Because the tripping stroke is not sufficient for static tripping of the opening latch, a tripping lever is quickly accelerated and actuates the latch with its kinetic energy. With the instantaneous release (54.2), the vacuum circuit-breaker reaches break times of no more than 20 ms, the vacuum circuit-breakers for rail applications especially designed for this purpose reach even < 17 ms. Fig. 36 Instantaneous release H83 Opt. Actuation Transistor switch (MOSFET) as a coupling device The low internal resistance of the tripping coil normally does not allow direct operation at the supply voltage because the large current levels in particular from auxiliary switches cannot be controlled. The release is thus fed from a capacitor bank with an electrolytic capacitor connected in parallel. This provides several advantages: The supply system only has to make available the minimal charging current. Because of the physical proximity of the capacitors to the release, only minimal voltage losses occur. The auxiliary switch only needs to shut off the residual current of the almost discharged capacitors after tripping has occurred. Nevertheless, the closing circuit is loaded with the high tripping current in particular at 60 V. With a protection relay that is set up very far away, unreliable line losses can therefore occur. Therefore, a faster transistor switch (MOSFET) must be used as a coupling device, which increases the response time by only a few μs and must always be used at 60 V. This tripping solenoid is not designed for continuous operation and can be ordered for voltage levels 60 V DC, 110 V DC and 220 V DC. Siemens Parts 9229 9947 176 0C 27
Description Note When an instantaneous release H83 Opt. is used, no 3rd release can be ordered and used. The capacitor tripping unit 3AX1550 and the transistor switch (MOSFET) are not included in the scope of supply and must be ordered separately. Heater (condensation water protection) The heater limits condensation and corrosion of the vacuum circuit-breaker. To this end, the heater has to be connected to the supply voltage (see circuit diagram included with the delivery). The surface temperature of the heater is maximum 180 C. Power consumption 50 W Fig. 37 Heater (71.) Electrical manual closing/electr. locking device In the basic version, the vacuum circuit-breaker with on-site connection is closed by direct mechanical unlatching of the closing spring. Instead of this mechanical manual closing, "electrical manual closing" is also available. In this version, the closing circuit of the vacuum circuit-breaker is electrically actuated by a sensing device and must also be enabled via a command element from the control room. With on-site closing, this permits taking into account system-related interlocking and allows you to prevent unintentional closing by the control room, for example. This allows for interlocking the vacuum circuit-breaker, for example, via the auxiliary contact of a disconnector. Vacuum circuit-breakers with electrical manual closing cannot be switched mechanically. 28 9229 9947 176 0C
Description Conditions Disconnected position Operating position CLOSED position OPEN position Interlocking devices To lock vacuum circuit-breakers as a function of the switching position, the spring drive mechanisms of the vacuum circuit-breaker can be equipped with an interlocking device. This is also the case for vacuum circuit-breakers on switch gear trucks, in withdrawable sections or with disconnectors. The vacuum circuit-breaker must be closable only in the operating or disconnected position (position of the vacuum circuit-breaker on the switchgear truck or withdrawable section in the switchgear). At the same time, the vacuum circuitbreaker may be moved on the switchgear truck or withdrawable section only when it is open. Positions of the vacuum circuit-breaker in the switchgear The isolating distance between the vacuum circuit-breaker contacts and the switchgear counter-contacts is attained fully. The circuit-breaker is inserted fully into the switchgear and the vacuum circuitbreaker contacts overlap completely with the switchgear counter-contacts. Mechanical interlock (optional with spring drive mechanism) An interrogation and actuation component (b) on the system side scans the operating position (CLOSED/OPEN) of the vacuum circuit-breaker. If the vacuum circuit-breaker is closed, actuation of the system's interrogation and actuation component (b) is prevented. A mechanical system in the switchgear truck or withdrawable section reliably blocks movements of the circuit-breaker on the switchgear truck or withdrawable section. If the vacuum circuit-breaker is open, the interrogation and actuation component (b) on the system side actuates, via the stroke (a), the vacuum circuit-breaker's mechanical interlock and reliably blocks closing of the vacuum circuit-breaker. X CLOSED position a Stroke (min. 10 mm, max. 30 mm) Y OPEN position b Interrogation or actuation component (max. actuation force 70 N) Z View from below c + d see dimension drawing Fig. 38 Mechanical interlock The installation dimensions (c + d) for the interrogation and actuation component (b) are in the dimension drawing. Siemens Parts 9229 9947 176 0C 29
Description Priority opening To lock vacuum circuit-breakers, switchgear trucks, withdrawable sections or disconnectors in OPEN position, the drive mechanisms of the vacuum circuitbreaker can be equipped with "priority opening". a) b) c) a) Idle position b) Trip-free position c) Spring-dump position *) Interrogation or actuation component (max. actuation force 70 N) Fig. 39 Priority opening Trip-free position Spring-dump position The assembly "priority opening" has three positions. These positions are actuated by an interrogation or actuation component in the system. Actuating "priority opening" with the system's actuation in the first position (trip-free position, b) triggers opening and prevents closing as long as priority opening is actuated. In the second position (spring-dump position, c) the vacuum circuit-breaker remains in open state and is reliably secured against reclosing. In addition, when actuating the interlocking device in the second position, the closing spring is relaxed by a no-load switching operation. The closing and the opening spring are now relaxed and hence all energy storages of the vacuum circuit-breaker discharged. The operating position (CLOSED/OPEN) of the vacuum circuit-breaker is not interrogated with "priority opening". Note Compared to the mechanical interlock (see Fig. 29), actuation of the system's interrogation and actuation component is not prevented if the vacuum circuitbreaker is closed. 30 9229 9947 176 0C
Description Rating plate a b c d Manufacturer Type designation Works serial number Rated voltage U r e Rated frequency f r Rated short-circuit breaking current I sc g Rated power frequency withstand voltage U d h Rated lightning impulse withstand voltage U p i k m Quality control seal Year of manufacture Rated operating current I r n Rated short-circuit duration t k Fig. 40 Example 3AH47 vacuum circuit-breaker rating plate o p r Mass m Rated operating sequence Classification to standard Technical data Rated voltage U r kv 17.5* 27.5* 27.5** Rated operating current I r A 2000 2500 1250, 2000, 2500 1250, 2000, 2500 Rated lightning impulse withstand voltage (peak value) U p kv 125 170 185 250 200 185 200 Rated power frequency withstand voltage (effective value) U d kv 50 70 85 105 95 85 95 Rated short-circuit breaking currenti sc ka 25 / 31.5 40 / 50 40 25 / 31.5 25 25 / 31.5 Rated frequency Hz 16.7 50/60 Rated operating sequence A, B C A Mechanical operating cycle in 60 20 60 20 60 thousands 25 / 31.5 A O - 3 min - CO - 3 min - CO B O - 5 s - CO C O - 0.8 s - CO - 30 s - CO * one-pole ** two-pole Fig. 41 Technical Data Dimensions and weights The dimensions of the vacuum circuit-breaker can be taken from the relevant dimension drawing. If required, these are available from your Siemens representative. The weight is given on the rating plate of the vacuum circuit-breaker (see Fig. 40) or can be taken from the relevant dimension drawing. Siemens Parts 9229 9947 176 0C 31
Description Ambient conditions 3AH47 vacuum circuit-breakers are suitable for use in the following climate classes in accordance with IEC 60721, Part 3-3: Class Climatic ambient conditions: 3K4 1), 3K6 2), 3Z2, 3Z5 Biological ambient conditions: 3B1 Mechanical ambient conditions: 3M2 Chemically active substances: 3C2 3) Mechanically active substances: 3S2 4) Fig. 42 Ambient conditions Insulating capacity Installation altitudes 1) peak value of the 24-hour mean: +35 C 2) Without ice formation and wind-driven precipitation 3) Without occurrence of salt fog and simultaneous condensation 4) Restriction: clean insulating parts 5) Average value, measured over 24 hours 6) Average value, measured over 1 month The insulating capacity of insulation in air decreases with rising altitude due to the lower air density. In conformity with IEC 62271-102, the rated lightning impulse withstand voltage values given in Fig. 41 are valid up to an installation altitude of 1,000 m above sea level. As from an altitude of 1,000 m, the insulation level must be corrected as shown in Fig. 43: U U 0 K a U Rated withstand voltage U under standard reference atmosphere U 0 Required rated withstand voltage for the installation location K a Altitude correction factor K a = e m (H 1000)/8150 Calculating the altitude correction factor K a : H = Installation altitude in meters m = 1 for AC voltage, lightning impulse withstand voltage (between phases, phase-to-earth, applied longitudinally) Example For a required rated withstand voltage of 75 kv at an altitude of 2,500 m, an insulation level of at least 90 kv under standard reference atmosphere conditions is required: Fig. 43 Altitude correction factor K a 90 kv 75 kv e 1 (2500 1000)/8150 75 kv 1.2 32 9229 9947 176 0C
Switching times Fig. 44 Switching times Description Closing time (closing time) < 75 ms Opening time (opening time) 1st shunt release (Y1) < 60 ms 2nd and 3rd release (Y2, Y4, Y6, Y7) < 55 ms Arcing time < 15 ms Break time 1st shunt release (Y1) < 75 ms 2nd and 3rd release (Y2, Y4, Y6, Y7) < 70 ms Dead time 300 ms Close/Open time 1st shunt release (Y1) < 90 ms 2nd and 3rd release (Y2, Y4, Y6, Y7) < 70 ms Minimum command duration Closing solenoid (Y9) 45 ms 1st shunt release (Y1) 40 ms 2nd and 3rd release (Y2, Y4, Y6, Y7) 20 ms Shortest pulse time for breaker tripping signal 1st shunt release (Y1) > 15 ms 2nd and 3rd release (Y2, Y4, Y6, Y7) > 10 ms Charging time if actuated electrically (M1) < 15 s Synchronous operation error between the poles 2 ms Closing time = period between starting (command) of the closing movement and the moment of contact touch in all poles. Opening time = period between starting (command) of the opening movement and opening of the last pole. Arcing time = period from the start of the first arc to extinction of the arcs in all poles. Break-time = period between starting (command) of the opening movement and extinction of the arc in the pole extinct last(= opening time + arcing time). Close/Open time = period in an open/close cycle between the moment of contact touch in the first pole during closing and the time when contact touch has been cancelled in all poles during subsequent opening. Dead-time = period from the end of the current flow in all poles up to the start of current flow in the first pole. Siemens Parts 9229 9947 176 0C 33
Description Circuit diagrams The circuit diagrams show all the available components with their wiring options. Fig. 45 to Fig. 51 show some non-binding examples of vacuum circuit-breakers. Compilation of the circuit diagrams for the vacuum circuit-breaker is done in relation to your order. Mechanical manual closing and electrical closing Release "OPEN" -Y1 -Y2 -Y4 -Y4 -Y5 -Y6 -Y7 -Y7 Fig. 45 Sample circuit diagram - connection via low-voltage interface, 64-pin, basic version Electrical manual closing and electrical closing extended auxiliary switch "OPEN" release -Y1 -Y2 -Y4 -Y4 -Y5 -Y6 -Y7 -Y7 Fig. 46 Example - circuit diagram with connection via low-voltage interface 64- pin. HA Manual opening S3 Position switch (opens when closing spring is charged) HE Manual closing S41, S42 Position switches (signal charging status) K1 Contactor relay (anti-pumping device) S6, S7 Position switches (for breaker tripping signal) M1 Motor X0 Low-voltage interface P Energy storage mechanism Y1 1. shunt release R1 Resistor Y2 2. Shunt release S1 Auxiliary switch Y4, Y5, Y6 Transformer-operated release S10, S11 Position switch (mechanical anti-pumping device) Y7 Undervoltage release S12 Position switch (prevents electrical closing in the event Y9 Closing solenoid of mechanical interlocking) S21, S22 Position switches (switch off the motor after charging) V6 Integrated rectifiers for motor This legend is also valid for the following circuit diagrams. 34 9229 9947 176 0C
Description a) b) c) d) 1) Integrated varistor 2) Integrated rectifier for AC/DC 100 V 3) Line H07V-K1x2.5sw (as per EN 50525-2-31) when motors are used with DC 24 V / 48 V and 60 V 4) Only if a mechanical closing lock is ordered at the same time a) Motor winding for DC b) Motor winding with rectifier for AC c) Closing d) Closing with anti-pumping device Fig. 47 Sample circuit diagram 64-pole (part 1) of the vacuum circuit-breaker Siemens Parts 9229 9947 176 0C 35
Description a) b) c) d) 1) Integrated varistor 2) Integrated rectifier for AC/DC 100 V a) 1st shunt release with 64-pole plug-connector b) 1st shunt release with 24-pole plug-connector c) 2nd shunt release with 64-pole plug-connector d) 2nd shunt release with 24-pole plug-connector Fig. 48 Sample circuit diagram (part 2) of the vacuum circuit-breaker 36 9229 9947 176 0C
Description a) b) c) d) e) f) 1) Integrated varistor 2) Integrated rectifier for AC/DC 100 V 3) Attention: connect L+ for direct current (DC) a) Undervoltage release b) Low-energy trip-coil c) 1st transformer-operated release d) Signal: spring state with 64-pole plug-connector e) Signal: spring state with 24-pole plug-connector f) Breaker tripping signal for 64-pole plug-connector Fig. 49 Sample circuit diagram (part 3) of the vacuum circuit-breaker Siemens Parts 9229 9947 176 0C 37
Description The unassigned auxiliary switch terminals are wired up with the 64-pole plug bottom. Normal auxiliary switch Extended auxiliary switch a) b) No wiring required if a) 2nd shunt release Y2 available b) Undervoltage release Y7 available Fig. 50 Example auxiliary switch terminals System wiring Tripping via NC contact Tripping via NO contact Circuit-breaker wiring System wiring Fig. 51 Sample switching operation for connection of the undervoltage release Y7 38 9229 9947 176 0C
Installation Installation DANGER High-voltage danger to life Touching live parts causes an electric shock. Do not touch live parts! When performing work on the switchgear, deenergize it and earth it. The work described in the following sections must only be performed when the switchgear has been deenergized: - Take safety measures to prevent reclosing. - Observe industrial safety regulations. - Ensure that the vacuum circuit-breaker is installed and commissioned only by qualified personnel who are familiar with the operating instructions and observe the warning notices. WARNING Risk of damage from wrong transport means Using wrong transport means may cause the vacuum circuit-breaker to fall and injure persons. Observe weight Use means of transport suited to the requirements and load-carrying capacity. The vacuum circuit-breaker must not fall over. Sharp edges may cause injury. Note For preliminary work, the vacuum circuit-breaker must be secured against falling over, placed onto a suitable support or suspended from a crane to prepare for installation. Check data Attachment in the switching cubicle The vacuum circuit-breaker is delivered in OPEN position. Before installing the vacuum circuit-breaker, remove the transport aids (see Unpacking (I) on page 6 or Unpacking (II) on page 10). Before installing the vacuum circuit-breaker in a switching cubicle, check the data (see Commissioning on page 45) in order to avoid confusion. Siemens Parts 9229 9947 176 0C 39
Installation Mounting position The 3AH47 vacuum circuit-breaker can only be installed horizontally (to the vacuum interrupter), as an indoor withdrawable section and as an indoor fixed installation. Fig. 52 Mounting position Mounting the vacuum circuit-breaker There are a total of 14 fixing holes on the pole plate (15) and on the mechanism box (60.) for the various types of installation. Use M12 screws strength class 8.8 for fastening. The binding dimension drawings are authoritative. The framework must be made to suit the operating conditions and have sufficient load bearing capacity and stability. Fig. 53 Fastening options Fig. 54 View Y and Z * bores for M12 screws 40 9229 9947 176 0C
Installation Connecting to earth Earthing Connect the vacuum circuit-breaker on the earth terminal (70.) to the high-voltage protective earth as specified (DIN EN 50341). Fully unscrew hexagon socket head screw M12 with washer on the earth terminal (70.). Tighten ring terminal of the earth wire with the M12 hexagon socket head screw on the earth terminal (70.) with 40 Nm. Note If the 3AH47 vacuum circuit-breaker is installed into a earthed metal frame and is connected permanently and electrically conductive, no separate earthing needs to be done. Place serrated washers under the screw heads when fastening the vacuum circuit-breaker in this case. Fig. 55 Earth terminal Fig. 56 Connecting earth wire Connect low-voltage Connect the low-voltage connecting cables in the customer's switch cabinet in such a way that safe operation as per supplied circuit diagram is guaranteed. Siemens Parts 9229 9947 176 0C 41
Installation Undervoltage release (Y7) available? Removing the transport securing device from the undervoltage release The vacuum circuit-breaker with an undervoltage release (Y7) 3AX1103 is supplied with a transport securing device. Remove the two top screws (60.2) of the mechanism box. Remove the two bottom screws (60.2) of the mechanism box until the cover (60.1) can be taken off. Slightly tilt the cover (60.1) of the mechanism box and lift off. Shift the locking screw of the striker from position A to B (see reference note in mechanism box [60.] of the vacuum circuit-breaker). Replace the cover (60.1) in the reverse order and fasten the screws with a tightening torque of 10 Nm. B A Fig. 57 Removing the cover Fig. 58 Removing the transport securing device 42 9229 9947 176 0C
Installation Electrical connection of the prime conductor DANGER High-voltage danger to life Test the vacuum circuit-breaker in the switchbay with high-voltage applied only after faultless functioning has been ascertained (see Commissioning on page 45). Note Grease the busbars with contact grease prior to mounting. The busbars can be purchased from the Siemens Service Center. Busbar connection Adjust the busbars in such a way that, before fastening, they lie flat easily and fit the holes on the contact areas of the vacuum circuit-breaker. Fig. 59 Cleaning the contact areas Fig. 60 Cleaning the contact areas of the busbars Note Clean silver spray-plated and copper spray-plated contact areas with a cloth, do not brush. Different connection materials (AI/CU) must not be cleaned with the same cleaning tools. Silver-plated parts must not be bolted to aluminium bars/rails. Preparing contact areas Use a steel brush to brush contact areas (cross-wise) until they are metallically bright and wipe them off with a clean cloth. After cleaning, very lightly grease the bright contact areas with acid-free Vaseline (e. g. Shell-Vaseline 8420) and screw together immediately. Siemens Parts 9229 9947 176 0C 43
Installation Fig. 61 Installing busbars flat Fig. 62 Installing busbars flat Corresponding to the nominal current strength, use M12 screws and nuts - strength class 8.8 - for connection and appropriate spring elements and washers. Note For vacuum circuit-breakers with connecting bars it is recommended to use the stainless steel screws or non-magnetisable screws included in the accessory pack. When tightening the screws, hold the nuts against tightening torque of 70 Nm with a suitable screwdriver or socket wrench. Screw-in depths in the upper and lower terminals See dimension drawings. 44 9229 9947 176 0C
Operation Operation DANGER High-voltage danger to life Touching live parts causes an electric shock. Do not touch live parts! Ensure that the vacuum circuit-breaker is operated only by qualified personnel who are familiar with the operating instructions and observe the warning notices. Check through all of the items on the checklist and ensure correct functioning before commissioning. Commissioning Before commissioning, check the following points to ensure that the 3AH47 vacuum circuit-breaker based is functioning faultlessly: Checklist Notes Does the information on the rating plate (see page 31) match the ordering data? Ensure correct operating voltage. If necessary, clean vacuum circuit-breaker (details on this in section Maintenance plan on page 50). Check that screw connections are tightened securely. Check terminal strip plug-connection for tight seat. Check functioning of the auxiliary switches. If necessary, check and adjust customer's devices. If there is an undervoltage release (Y7) 3AX1103 : has the locking screw of the striker been shifted from position A to B (see Removing the transport securing device from the undervoltage release on page 42)? Test switching without supply voltage Charge the closing spring (62.) with the hand crank (50.) (see 63), then actuate the CLOSED pushbutton (53.) and, once closing has been performed, actuate OPEN pushbutton (54.). Test switching with supply voltage For test switching with motor, switch on the supply voltage. The motor starts up immediately and charges the closing spring (62.). Check indicator for charge state of the closing spring (mechanically and electrically). Electrically check through auxiliary switch S1 (68.) and position switch (50.4.1) in both end positions operate the 3AH47 vacuum circuit-breaker to do so. Check functioning of the closing solenoid Y9 (53.1) and all available shunt releases by operating them electrically. Siemens Parts 9229 9947 176 0C 45
Operation WARNING Do not commission the vacuum circuit-breaker if there are malfunctions. If the malfunctions or the damage cannot be remedied, contact a Siemens representative or Siemens Service and, if necessary, send back the vacuum circuit-breaker. First closing operation If all functions have been checked and are ok, switch on high-voltage while observing all of the safety regulations and operative requirements. Charging the closing spring WARNING Risk of injury if hand cranks other than the original hand crank are used. When the supply voltage is present, the motor immediately recharges the spring after a closing operation. If the hand crank does not have a slip coupling, the hand crank will also rotate. To avoid injuries caused by the motor starting suddenly, the vacuum circuitbreaker must be charged only using the original hand crank. Hand crank If the supply voltage is applied, the closing spring (62.) is automatically charged by the motor (50.4). If the supply voltage fails, the closing spring (62.) can be charged with a hand crank (50.). 1. For this, fit the hand crank (50.) onto the hand crank coupling (50.5) through the opening (50.1) with the adapter pushed forward (50.6). 2. Turn clockwise until the spring state indicator (55.) changes over: Relaxed Charged Fig. 63 Charging the closing spring with the hand crank Fig. 64 Operating elements and spring state indicator 46 9229 9947 176 0C