MSP1000 Motor Protection Relay

Transcription

1 MSP1000 Motor Protection Relay I N S T R U C T I O N & M A I N T E N A N C E M A N U A L

2 TABLE OF CONTENTS 1. Introduction Description of Components MSP1000 Specifications MSP1000 List of Connections MSP1000 Protection Unit 115V / 230V MSP1000 Monitor Unit Handling and Storage Installation Planning Installation Operation Front Panel Controls Indicator Lights Trip / Start Indicator LED Alarm Indicator LED Readings Settings Faults Internal Fault Codes Protection Unit Controls Reset Pushbutton Trip Indicator LED Alarm Indicator LED System OK Indicator LED Addressed Indicator LED Maintenance Typical Installation Drawings DOL Reversing Starter Fig CE Marking and the EMC Directive The EMC Requirements Installation EMC requirements Low Voltage Directive Machinery Safety Directive 20 Appendix 1: General Information on Temperature Monitoring 21 Technical specification 22 2

3 1. INTRODUCTION The MSP Systems bv MSP1000 Motor protection relays are designed to protect electrical motors and connected loads from possible damage whilst minimizing the possibility of erroneous tripping and providing full information to the operator. The MSP1000 Motor protection relay is designed to protect the motor from the following occurrences. Thermal overload and cooling problems by RMS current measurement, thermistor monitoring, true thermal models and programmable starting conditions. Mechanical overload by stall protection as well as the thermal overload model. Electrical fault conditions of short circuit, phase imbalance, earth fault and phase reversal. The MSP1000 Motor protection relay may be configured to control Direct on Line (DOL), Direct on Line Reversing (DOLR), 2 Speed, Star-Delta, Auto-Transformer, Soft Start and Variable speed drives. Total protection means system protection not just the motor Up to 99A Full Load current can be monitored directly with the 16mm internal diameter Current transformers which are an integral part of the Protection Unit whilst above this various configurations of CTs can be provided. Earth Leakage current can be monitored either directly with the integral phase Current transformers or for more accurate requirements a Core Balance Current Transformer (CBCT) can be connected. The Monitor Unit provides a local Interface to the operator and can display percentage load current, phase current, unbalance, earth fault current, reserve thermal capacity & remaining time to trip. User configurable settings can be monitored. Alarms and trips can be reset locally or remotely. The MSP1000 Motor protection relay can be configured by PC over a RS232 Serial Link or alternatively via a MSP Gateway Device. 1.1 Description of components The MSP1000 Motor protection relay consists of a Protection unit and an optional Monitor unit. The units are intended for mounting in Motor Control Centers. 3

4 Dimensional Sizes are as follows. Relay dimensions MSP1000 L x W x H = 154 x 74 x 96 mm (6.1 x 2.0 x 3.7") Cable hole diam.: 16mm (.63") Mounting: DIN rail / 2 screws Size L x W x D = 130 x 90 x 42 mm (5.1 x 3.5 x 1.6") Panel cutout 121 x 81 mm (4.8 x 3.2") 4

5 1.2 MSP1000 Specifications Specifications at 25 C unless otherwise noted. Phase current input circuits Max input current: Not limited by the unit; cables pass through the 16mm (0.63") inner diameter openings In the unit, without physical connections; CTs are built in. Full scale input current: >1100% of Inom setting Minimum detection level: <1.5% of Inom setting Setting range: A using integral CTs; 5A-99.9kA/5A using external CTs. Fundamental frequency: Hz Method of measurement: True RMS up to 15kHz within 3dB Accuracy above 20Hz: Greatest of 1% of reading and 0.5% of Inom Drift: <1% per 10 C change Low frequency accuracy: -1% at 10Hz; -2% at 8Hz; -3.5% at 6Hz; -7% at 4Hz Burden (each phase): <0.04mOhm; <0.004VA at 10A; <0.4VA at 100A Isolation voltage: Motor status detection: 1000VRMS continuous; 2000VRMS 1 min. Stopped when current <4% of Inom Starting after current went from <4% to >5% of Inom. Running when current stays 4-100% of Inom Note: Interposing CTs may be low cost Instrument Class to BS7626 / IEC158 because of the very low burden. Earth fault input circuit (core balance) CBCT ratio: 500:1 Max CBCT primary current: 200A continuous; 350A 1 minute Full scale CBCT primary current: >17A Minimum primy detection level: <15mA Fundamental frequency: Hz Method of measurement: True RMS up to 15kHz within 3dB Accuracy above 20Hz: Greatest of 1% of reading and 10mA, excluding accuracy of the core balance CT Drift: <1% per 10 C change Low frequency accuracy: -1% at 10Hz; -2% at 8Hz; -3.5% at 6Hz; -7% at 4Hz Burden to CBCT: <2Ω resistive Wires: mm2, AWG Terminal numbers: 21 and 22; 23 and 24 must be shorted if core balance CT is used There are standard 500:1 core balance transformers with various diameters and split core designs with 2% accuracy over full temperature range. 5

6 Overload protection Type: Fully programmable overload protection curve with true RMS current measurement & thermal model Trip time formula: D(t) = 35.5 T6In ln i2(t) - [1-RC(t)] i2(t) - 1 This is a first order model in which: D(t) = trip time at time t i(t) = motor current normalized with respect to Inom at time t; 1=100% RC(t) = reserve capacity at time t; 1=100% T6In = thermal capacity or locked rotor setting in seconds (at 6xInom) Trip time accuracy: Thermal memory i>1.5 greatest of 5% and 300msec i>2 greatest of 2.5% and 300msec i>4 greatest of 1% and 300msec The state of the thermal model will be retained in non-volatile memory during Power down. When power is restored the thermal model will revert to the pre-power down condition. All trips and alarms are also memorized. Protection functions other than overload Short delay range: Short delay accuracy: Medium delay range: Long delay range: Delay increase function: Delay increase (msec): msec (short circuit, earth fault And stall only) +20/-0msec, excluding delay due to waveshape of current 1-30sec +0/-125msec 1-30min +0/-7sec IACTUAL / ILEVEL > ILEVEL is the current level set for the associated function. Phase reversal detection time 2 cycles 6

7 Thermistor input Hot trip resistance: /-5% Cold reset resistance: /-5% Short circuit resistance: <45Ω +/-20% 1) Open circuit resistance: 1.5MΩ +/-20% 1) Thermistor type: PTC according to IEC specifications Wires: mm2; AWG Terminal numbers: 27 and 28 Purpose: Thermistor The thermistor input will accept an input from up to six 250 ohm PTC type thermistors embedded in the motor windings 1) If wire fault recognition is switched off, then a short circuit condition is interpreted as a cold thermistor and an open circuit condition is interpreted as a hot thermistor. Contact inputs Contact type: Voltage between input terminals: Max loop resistance: Wires: Terminal numbers: Purpose Remote Reset: Relay contacts Contact type: Rating (resistive): UL/CSA rating: Isolation voltage: Expected life: Wires: Terminal numbers: Purpose Alarm & Trip Relays: Dry contact 5Vdc through 26kΩ 1kΩ (sum of leads resistances plus contact resistance) mm2; AWG (signal) and 26 (return); Remote reset The remote reset input will accept a normally open voltage free contact. It will effect a reset of any trip or alarm condition which is configured for manual reset. 1 NO (form A) + 1 NC (form B) contact Max switching power 1250VA, 150W max switching voltage 380Vac, 125Vdc max switching current 5A 5A 1/6HP 125, 250Vac; 5A 30Vdc 30W max: 1A 30Vdc, 0.24A 125Vdc 1000VRMS continuous; 1500VRMS 1 minute >3x 104 operations mm2; AWG and 12 NO trip relay 13 and 14 NC trip relay 15 and 16 NO alarm relay 17 and 18 NC alarm relay Provides control and alarm functions as configured by the software 7

8 PC (programmer) interface E1A standard: Output voltage: Max cable length: RS232D -5/+5Vdc max 15m Local Datalink interface to MSP Gateway Device Output voltage: 10Vdc max Datalink cable type: Low cost two wire cable (e.g. one twisted pair with optional shield, or coax) Max length of datalink cable: 750m Max DC resistance of cable (sum of signal and return wires): 100Ω Max capacitance of cable: 50nF Max number of systems connected to one MSP Gateway Device 12 Isolation voltage 1500VRMS continuous Inter-unit interfaces Output voltage: Max total cable length: 7Vdc max 10m Control voltage input Ranges: Vac or Vac -20/+10% Under voltage tolerance: -30% 1 second; -70% 50msec Frequency: 50-60Hz Power requirement: 10VA max Isolation voltage: 1000VRMS continuous; 1500VRMS 1 minute Wires: mm2; AWG Terminal numbers: 1 (earth), 2 (neutral) and 3 (line) Environment Operating temperature: Storage temperature: Humidity: Sealing: Noise immunity (EMC): -10/+60 C ambient -30/+70 C ambient 30-95%, non condensing IP54B (Monitor Unit) IP20 (Protection Unit) In conformity with BS EN & BS EN Vibration: In conformity with IEC In conformity with IEC

9 1.3 MSP1000 List of connections MSP1000 Protection Unit 115V/230V For all interconnections employ instrumentation wiring practices 'DISPLAY' 'OPTIONS' 'PC LINK' Connects to a MSP-1000 Monitor Unit. For future connections Optionally connects either temporarily to a programmer PC (RS232), or permanently to the MSP Gateway Device. In the latter case configuration can be achieved by connecting the programmer PC to the Gateway Device. 1, 2, 3 Connect 1 to earth. This should be earthed to the rear mountingplate or DIN rail immediately adjacent to the side of the unit. Connect 2 to Neutral supply. Connect 3 to Line supply. See part numbers for supply voltage. Use isolated stranded copper wire mm2, AWG , 12 NO contact of trip relay (power-off state = open) 13, 14 NC contact of trip relay (power-off state = closed) The relay can be set for failsafe and non-failsafe operation. It must be wired into the motor's start/stop logic such that the motor stops when The relay is operated, and cannot be restarted until the relay is reset. Use isolated stranded copper wire mm2, AWG , 16 NO contact of alarm relay (power-off state = open) 17, 18 NC contact of alarm relay (power-off state = closed) The relay can be set for failsafe and non-failsafe operation. It can optionally be used to generate any sort of action the user finds useful In case of events designated by the programmer PC to be an'alarm'. Use isolated stranded copper wire mm2, AWG

10 21,22 If a Core Balance Current Transformer (CBCT) is used to measure 23,24 Current flowing to earth, it must be connected to terminals 21 and 22, Using twisted pair cable, preferably shielded, mm2, AWG The shield must be connected to instrument earth at either end of the cable. Terminals 23 and 24 must be connected together in this case. The length of the cable is limited by its resistance; the resistance must be low enough not to cause saturation of the CBCT at the maximum current level one wants to be able to measure (this figures limited to 17A, since that is the full scale value of the system). 25, 26 Input for an optional remote reset push button (NO). Use wires mm2, AWG ; for runs longer than 2m twisted pair. Length is not explicitly limited, except by cable resistance (max 1kΩ). 27, 28 Input for an optional thermistor or string of max 6 thermistors. Use twisted pair wire, mm2, AWG Length is not explicitly limited, except by cable resistance (max 20Ω if short circuit detection is required, else max 100ê) MSP1000 Monitor Unit For all interconnections employ instrumentation wiring practices. This unit has only one outlet on the back side. Use cable assembly according to drawing 1 to connect to a MSP-1000 Protection Unit. 10

11 2. HANDLING AND STORAGE Units should be stored in an temperature between -30 C and 70 C. Unless mounted the units should not be removed from their original packaging. 3. INSTALLATION 3.1 Planning In order to avoid the greatest degree of protection from spurious electrical signals and comply with EMC requirements units should be mounted in a metallic enclosure suitably earthed and with the door also bonded to earth according to good electrical practice. The maximum cable size that can be accommodated directly in the current transformer (CTs) apertures is 16mm per phase. Full load current (I-nominal) setting range: One model covering the range of 1.6 to 10,000Amp (Inom). Using../5 CT s Inom range Step CTs A 0.01 A Integral A 0.1 A Integral or External A 1 A External KA 0.01 KA External KA 0.1 KA external NOTE: Interposing CTs may be low cost Instrument Class (IEC158/BS7626) because 11

12 Earth leakage monitoring can be set to an accuracy of between 3% and 30% of actual running current using the integral CTs, for greater sensitivity than this an external Core Balance Current Transformer (CBCT) can be used. The MSP1000 will then be capable of being set in the range of 0.1 to 10A of actual Ground Fault current. The ratio of the CBCT is 500:1. A range of CBCTs matched to the MSP1000 can be supplied which also include split core types. The MSP1000 Motor protection relays are factory set for 115 or 230 nominal control voltages. Should the wrong control voltage have been ordered then special instructions can be given to alter the control voltage. 3.2 Installation a. The Protection Unit should be mounted on a standard DIN mounting rail or Alternatively directly on a backplate by means of the 2 corner fixings. Orientation of the Protection Unit is not critical. Note: all cables should be run adjacent to the metal surfaces and not suspended freely in mid-air. b. The Control Voltage at 115V or 230V should be attached to terminals 2 & 3. The 115 or 230V supply live and neutral conductors to the Protection Unit should be run side-by-side directly to the units. The return circuit must always follow the path of the supply circuit and not be looped around to the other components before returning. c. The incoming supply earth should be directly bonded to the metal enclosure by a short lead (no longer than 160mm) and a minimum cross section of 1.5mm2 (AWG16). d. The earth connection to terminal 1 should be taken directly to the DIN rail or the metal backplate adjacent to the Right hand side of the Protection Unit. e. The typical system configuration diagrams for MSP1000 connections are included in Chapter 6. f. If the full load motor current is between A the MSP1000 can be used as a stand-alone unit with the motor cable passing through the 16mm (0.63") diameter holes in the unit. If the motor current is between 5-10,000Amp, or cables are of a diameter greater than 16mm interposing CTs can be used. See figure 5 for connections. g. If required connect thermistor units (max. 6 in one line) using screened twisted Pair cable, connected to terminals 27 and 28. h. If required connect the Core Balance Current Transformer to terminals 21 and 22, with twisted pair cable. Connect a short wire link between terminals 23 and 24 if the CBCT is fitted. 12

13 i. The trip relay volt free contacts (NO) should be connected into contactor control circuit from terminals 11 and 12 and if required the (NC) volt free contacts are available at terminals 13 and 14. This is on the basis that the relay is to be set up as failsafe. j. If required the Remote reset can be connected between terminals 25 and 26 using twisted pair cable. k. The volt free contacts of the Alarm Relay can be connected between terminals 15 & 16 (NO) and 17 & 18 (NC). l. Install the MSP1000 monitor in the front panel if required. Use the cable provided (1.5m, 60") to connect the monitor unit to the MSP1000 Protection unit, if the supplied cable is not long enough a similar cable can be made up with a maximum cable length of 10 meters. Ensure that the cable is run in close proximity to metalwork and is spaced 30mm apart from control cables. m. Either connect the MSP1000 Unit permanently to a MSP Gateway device using the cable assembly as drawing 3 or alternatively make a temporary connection to a PC RS232 Serial port as shown in drawing 2. If a permanent connection is made to the MSP Gateway device then the unit can still be configured via the MSP Gateway device, by connecting the PC Programmer to this device. n. Power up the MSP1000 and Personal computer. Check that the "must flash" LED is flashing on the MSP1000 and that the front panels LCD is indicating. o. Install the Software on the PC. (see separate manual) 13

14 4. OPERATION 4.1 Front Panel Controls Indicator Lights Trip /Start Indicator LED The Trip/Start indicator will flash red during the Starting period of the motor. The Trip/Start indicator will be continuously lit red when a trip occurs and remain lit until (a) the reason for the trip is removed and (b) the trip is reset if manual reset was selected Alarm Indicator LED The Alarm indicator light will be continuously lit amber when an alarm occurs and will remain lit until (a) the reason for the trip is removed (b) the trip is reset if manual reset was selected Readings The following readings are available from the Display Panel. Successive presses of the "Readings" button will cycle round the reading from 0 to 11. If the button is depressed longer than 2 seconds the display reverts back to 0. 1: 86 Display showing percentage Full Load Current Flashing values are pre trip values Reading No. Display Notes 0: LOAD Load % Inom 0 to 2500% 1: PH 1 Current Phase 1 A to 9999A 0.01 to 99.99KA* 2: PH 2 Current phase 2 A to 9999A 0.01 to 99.99KA* 3: PH 3 Current Phase 3 A to 9999A 0.01 to 99.99KA* 4: U/B Unbalance % of load 0 to 200% 5: E/F CURRENT Earth fault current %Ph current 0 to 200% 6: E/F CURRENT Earth fault current Amps to (CBCT only) 0.1 to 99.9 (Spill only) 7: RESERVE CAPACITY Reserve thermal capacity% 0 to 100% (-999% Emergence reserve ) 8: TIME TO TRIP/RESET Time to trip at steadystate 1 to 9999 seconds 9: RUNNING HOURS Actual motor running hours 1 to 999,999 10: NO OF STARTS Number of starts 1 to 999,999 11:LAST START LOAD Last start load % Inom 10 to 2500% * Depends on CT ratio 14

15 4.1.3 Settings The following settings are available from the display panel. Successive presses of the "Settings" Button will cycle round the reading from 20 to 32. If the button is depressed longer than 2 seconds the display reverts back to 20. Settings can only be displayed, they cannot be altered except from the RS232 datalink. 20: 76 Typical display showing Inom current Amps Reading No. Display Notes 20: In Load Inom current Amps 1.6A to 99.9KA 21: U/B LIMIT Unbalance limit 3-40% 22: E/F LIMIT (SPILL) Eart fault limit (Spill connection) 3-30% 23: E/F LIMIT (CBCT) Earth fault limit (CBCT in use) to 10.0A 24: S/C LIMIT Short circuit limit % 25: STALL LIMIT Stall limit % 26: U/C LEVEL Under current level % 27: Tx6xIn Trip time at 6 times Inom 1-60 sec 28: RES CAP FOR START Reserve capacity for start 10-90% 29: RES CAP AT 100%LOAD Reserve capacity at 100% load 0-90% 30: COOLING REDUCTION MOTOR OFF Increase in cooling when motor Switched off 1-60 times 31: RES CAP ALARM LEVEL Reserve capacity alarm level 1-99% 32: TIME TO TRIP ALARM LEVEL Time to trip alarm level secs Faults (a) The Faults page is accessed by pressing the FAULT button. (b) If no Alarms or Trips are present then the two dashes are displayed. -- No Alarms or Trips present. (c) When an alarm or trip occurs an "A" is displayed at the extreme left of the display if the alarm or trip is automatically resettable on removal of fault. (d) The Fault code is a one or two character display as tabulated below. (e) Once current has been detected a colon and a "0" or a "1" will be displayed after the fault code as follows. code : 0 trip or alarm during starting code : 1 trip or alarm during running A 12:0 Thermistor Alarm during start-auto reset 15

16 (f) 8: 55 Once the fault has been reset and has cleared any remaining time to reset (as in the case of an overload of thermistor trip is automatically displayed as follows (the display reverts to the readings page) 55 seconds to auto reset Trip code Trip Event Applies trip And/or Alarm 1 Phase reversal T + A 2 Phase loss T + A 3 Unbalance T + A 4 Earth fault T + A 5 Short Circuit T + A 6 Stall T + A 7 Undercurrent T + A 8 Overload T + A 9-2 Low time to trip due to phase loss A 9-3 Low time to trip due to unbalance A 9-4 Low time to trip due to earth fault A 9-5 Low time to trip due to short circuit A 9-6 Low time to stall A 9-7 Low time to trip due to undercurrent A 9-8 Low time to trip due to overload A 10 Low reserve capacity A 11 Start inhibited T 12 Thermistor hot T + A 20 Thermistor o/c or s/c T + A 21 Current sensed while tripped A 22 Not addressed by Master (>5sec) T + A 30 Eeprom checkword error T + A 3.(x) Option (x) offline (Where (X) is the Option number 3 to 16) (x).0 Notes Internal Fault Codes (after power up only) Should the following messages be displayed at Power up then the unit should be returned to MSP Systems bv for attention. Condition Eeprom not accessible at power up Watchdog fail at power up Display Error.2 Error.3 16

17 4.1.6 Protection Unit Controls Reset Pushbutton The reset pushbutton when pressed will reset all the alarms and trips with the exception of those that have been set for Telemetry only reset Trip Indicator LED The trip indicator will be continuously lit red when a trip occurs and remain lit until the trip is reset if manual reset and also when the reason for the trip is removed Alarm Indicator LED The alarm indicator will be continuously lit amber when an alarm occurs and will remain lit until the alarm is reset if a manual reset is required and also when the reason for the alarm is removed System OK Indicator LED This indicator should continuously flash approximately twice a second whilst the MSP1000 is healthy and operating correctly. Should this fail then the unit should be returned to manufacturer for attention Addressed Indicator LED This indicator should flash intermittently when the MSP1000 is connected either to a MSP Gateway device or a PC the Datalink socket. 5. MAINTENANCE (a) (b) (c) There are no user maintainable parts in either the Display Unit or the Protection Unit. If the unit is not found to be operating correctly then it should be returned to the manufacturer for repair. Calibration checks can be conducted as per sections Commissioning. It is recommended that on an annual basis the exterior of the units and the associated cabling is checked for signs of damage such as chafing of cables and any possible signs of overheating, and any large deposits of dust which may affect the cooling of the units should be removed. 17

18 6. TYPICAL INSTALLATION DRAWINGS 6.1 DOL Reversing Starter Fig. 1 18

19 7. CE MARKING AND THE EMC DIRECTIVE 7.1 The EMC requirements Compliance with the EMC Directive is mandatory from January 1996 for almost all electrical equipment placed on the market or taken into service anywhere in the European Community. The directive applies to apparatus and systems but does not apply to components or installations. In order to CE mark the product the Manufacturer or European Agent has to make a 'Declaration of conformity'. Before a declaration of conformity can be made the product must have either (a) been formally tested to the Generic or Product Specific EMC standards as detailed in the Official Journal (OJ) of the European Community. or (b) a Technical Construction File must have been created which in turn must be approved by an DTI appointed 'Competent Body'. A technical construction file is a document where logic reasoning is used as a complement to laboratory testing. A technical construction file is used where the equipment is too large to be tested in a laboratory or where products exist in many similar versions. MSP1000 On the basis of the tests to the Generic Standards and the approval of the technical construction file a formal declaration of conformity to the EMC Directive is made. Consequently we will now be CE marking these products. 7.2 Installation Data pertinent to EMC requirements The following installation information is given throughout this manual in the appropriate sections: (a) The equipment should be mounted in a metallic enclosure suitably earthed and with the door also bonded to earth according to good electrical practice. (b) The incoming supply earth should be directly bonded to the metal enclosure by a short lead (no longer than 160mm) and a minimum cross section of 1.5mm2 (AWG16). (c) All cables should be run adjacent to the metal surfaces and not suspended freely in mid-air. (d) The 115 or 230V supply live and neutral conductors to the Protection Unit should be run side-by-side directly to the unit. The return circuit must always allow the path of the supply circuit and 19 not be looped around to other components before returning.

20 (e) The Protection Unit Earth terminal should be connected to the DIN rail or backplate earth at the immediate side of the unit. (f) The Data cable between the display unit and the protection unit should be run a minimum of 25mm apart from control cables to stop/start pushbuttons, etc. (g) Twisted pair cables should be used for the reset line. (h) Screened cables should be used for the thermistor input. (i) RS485 Datalink cables should be run externally in screened twisted pair cables. The cable should be earthed at the point of entry to the enclosure by means of a cable gland which clamps the cable earth screen through a full 360 degrees. 'Pigtail' earth connections must be avoided. Equipment is required to be installed in line with the above statements in order to comply with the EMC Directive. 8. LOW VOLTAGE DIRECTIVE In order to comply with the Low Voltage Directive the equipment must be (a) Safe. (b) Constructed in accordance with good engineering practice. (c) Safe when connected to the electricity supply system by the provision of protective earthing and other means. (d) Designed and constructed to conform with the principal elements of the Safety Objectives. Note that these safety objectives can be met by compliance with a Harmonised Standard. The Manufacturer or his agent must (e) Draw up and hold a Declaration of Conformity. (f) Compile and hold the Technical Documentation. (g) Have the 'CE' Mark affixed to the Product, its packaging, the instruction sheet or its guarantee certificate. 9. MACHINERY SAFETY DIRECTIVE The MSP1000 is not a machine in the sense of the machinery directive as it has no moving parts and the risks are mainly of electrical origin and covered by the Low Voltage Directive. 20

21 APPENDIX 1 : General Information on Temperature Monitoring Two types of temperature measuring sensors are catered for. Thermistor type (PTC) for use with the MSP overload relay and the PT100 for use with the RTD3 devices. PTC, direct to MSP1000 thermistor input. PT100 via RTD units, relay contact to thermistor input. Thermistor (PTC100) The Thermistor is a semi-conductor element with a temperature-dependent, nonlinear resistance characteristic, also known as a thermistor with Positive Temperature Coefficient (PTC). The resistance of the thermistor is relatively low at normal temperatures and remains nearly constant up to a critical value - referred to as Nominal Actuating Temperature (NAT) - which is selected for the class of winding insulation that is to be protected. At this point (NAT), even a slight increase in temperature will cause the resistance of the thermistor to rise to a value up to several hundred times its normal value when cold. The positive characteristic, i.e. resistance increase with temperature, achieves inherent safety; an open circuit of a thermistor or broken connection will have the same effect as an unsafe temperature. Platinum resistance thermometer (PT100) For precise temperature measurement the PLATINUM RESISTANCE THERMOME- TER, and in particular the ceramic bodied wire-wound platinum resistance temperature detector has the highest performance, when compared against "film" and "glassed" types of detectors. These devices are ideally suited for differential bearing temperature monitoring when suitably located in the bearing outer housing. The suppliers of the devices should be consulted for optimum results. 21

22 In current ranges AMP One model covering the range of 1.6 to 10,000A Using../5 Amp CT s Inom range Step CT s A 0.01 A Integral A 0.1 A Intergral or External A External ka 0.01 ka External ka 0.1 ka External NOTE: Interposing CT s may be low cost instrument class (IEC158/BS7626) because of the low burden. Thermal model T6x In Sec Locked rotor time in 1-60 sec in 0.1 sec steps at 6xIn Reserve cap at 100% load (hot curve) % Level settable % Res.cap for start % Settable reserve capacity level needed for motor start. Start is inhibited below this level. Switchable trip if reserve capacity falls below this level to always guarantee one start capability Res.cap alarm level % Warring level settable in % reserve capacity; switchable on/off Technical specifications Time to trip alarm level Sec Warn if remaining time before trip drops below level settable in sec Switchable on/off. Thermistor input Integrated with thermal model, S/C and O/C detection, switchable on/off. (RTD via separate add-on option). Stall limit % In Level programmable from %, steps 10%. Delay programmable from 50 msec-10 sec, steps 25 msec-1 sec. Switchable on/off, always trip if on. S/C Limit % In Level programmable from % of the set In in 10% steps. Delay 50 msec-10sec., steps 25 msec-1 sec. Excludes contactor trip inhibit. Contactor trip inhibit (class C coordination) Level programmable from % of the set In in 10% steps. If switched on it allows S/C to be cleared without opening contactor. Then trips contactor safely with indication of short circuit. Delay until current falls back below level. E/F Limit (Spill) %PH Level programmable from 3-30% of actual running load, in 1% steps. Delay settable 1-10sec steps 1 sec. Switchable alarm/trip. E/F Limit (CBCT) Amp Level settable 100 ma-10 A, in 100mA steps. Delay settable 50 msec-10 sec in 25 msec-1 sec. steps. Switchable alarm/trip. U/B Limit % Level settable 3-40%,in 1% steps. Delay settable, 1-30 sec in 1 sec steps, or 1-30 min., in 1 min. Steps. Switchable alarm/trip Phase loss (U/B>50%): Delay settable:1-30 sec, 1 sec steps; always trips. 22

23 Phase reversal Switchable trip/off. Phase rotation switchable ABC/BAC. Detection time:2 cycles. U/C Level % In Level settable % of In, in 1% steps. Delay programmable 1-30 sec, in 1 sec steps or 1-30 min, in 1 min Steps. Switchable on/off. Switchable trip or alarm. Memory Reserve capacity is memorized during power down. Running status, trip causes, pre-trip values, number of starts and running hours are all memorized. Trip relay 2 isolated circuits (NO/NC). 5A/380Vac, 1250VA, 150W. Selectable failsafe/non-failsafe. In non-failsafe selectable pulse tripping(shunt). Alarm relay 2 isolated circuits (NO/NC). 5A/380Vac,1250VA,150W Selectable failsafe/non-failsafe. Control Voltage 115 of 230 Vac (specify at order) Plug-in LCD display Shows 12 readings of actual values and 13 settings. Indication of trip and alarm causes. Reset button. Relay test capability. Cooling reduction motor off Specifies reduction in cooling due to stopped fan as compared to running fan. Nomally set at 3. Technical specifications External core balance CT input Use special low power zener protected core balance CT s. *round cores CB500-12/Z CB500-33/Z CB500-30/Z CB500-31/Z CB500-32/Z *Square cores CB5-1015SP/Z CB5-1020SP/Z CB5-1025SP/Z CB5-1030SP/Z CB5-1035SP/Z CB5-1040SP/Z Internal diameter 46 mm 65 mm 85 mm 145 mm 245 mm Inside dimension 100 x 150 mm 100 x 200 mm 100 x 250 mm 100 x 300 mm 100 x 350 mm 100 x 400 mm All these cores are also available at spit cores. Consult factory for other dimensions. Dimensions MSP1000 base unit (WxHxD) 154x74x96mm 3 cables holes round 16mm MPS1000 monitor (WxHxD) door cut-out Ambient temperature range -10 C-+60 C (operating) -50 C-+80 C (storage) 130x90x42mm 81x121mm 23

24 MSP1000 Motor Protection Relay HOLLAND Alectryon P.O. BOX AK Hengelo Holland Tel +31(0) Fax +31(0) Revised Febi 2009 RRINTED IN HOLLAND 24