Data Bulletin. Hospital Isolated Power Systems. Dual Output Voltage Isolation. Class 4817 INTRODUCTION

Transcription

1 Data Bulletin June 2002 Nashville, TN, USA Hospital Isolated Power Systems Dual Output Voltage Isolation Panels Class 4817 INTRODUCTION The dual output voltage hospital isolation panel is a single, ungrounded hospital isolation panel that can supply two different output voltages simultaneously. Similar to a standard distribution panel or load center, it can supply both 120 V and 208 V or 120 V and 240 V of ungrounded, isolated, single-phase power using only one isolation transformer. Other hospital isolation panels can supply only one output voltage. Typically, the 208 V or 240 V circuits of the dual output voltage panel supply power to operating room equipment such as mobile X-ray machines or surgical lasers. Simultaneously, the panel s 120 V circuits can supply power to convenience receptacles, surgical lights, X-ray film illuminators, sterilizers, and other 120 V appliances commonly found in operating rooms. This panel is ideally suited as a power supply to power/ground modules and X-ray indicator/receptacle modules, also manufactured by Square D. The Dual Output Voltage Panel is factory equipped with eight 20 A, 2-pole branch circuit breakers for the 120 V applications and is field expandable up to 16 circuits (Square D Catalog number QO220). The 208 V and 240 V application has one main breaker fed from a transformer rated at 15 kva only and two branch breakers (20 A, 2-pole through 60 A, 2-pole). The panel is sized according to the 120 V kva requirements and coordinating the 208 V and 240 V requirements (See Table 2). The panel is designed to supply ungrounded power to only one operating room. Use of the panel to supply power to more than one room may conflict with National Fire Protection Association (NFPA) 99, Standard for Health Care Facilities, paragraph (d) The transformer s overall power rating in the dual output voltage isolation panel is the sum of the two secondary windings. The 208 V and 240 V secondary winding is always rated at 60 A, while the 120 V secondary winding can be rated at 5.0, 7.5, or 10.0 kva. All applications include a primary main circuit breaker as well as secondary main circuit breakers for both windings (208 V and 240 V, and 120 V). The 208 V and 240 V secondary main circuit breaker is always rated at 60 A, while the 120 V secondary is rated to comply with the size rating of the 120 V secondary winding. Figure 1: Dual Output Voltage Isolation Panel

2 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Standard Features June 2002 STANDARD FEATURES The dual output voltage hospital isolation panel offers the following standard features: Primary main circuit breaker Secondary main breaker(120 v) Optional accessories Secondary circuit breaker (Type QO, 2-pole 1 60 A, 208 V) ISO-GARD Line Isolation Monitors Ground receptacles (30 A) Receptacles (208 V, A) Receptacles (120 V, 20 A) NEMA Type 1 enclosure with 4-gauge stainless steel Dual output voltage isolation transformer Figure 2: Features Low leakage, copper-wound, dual output voltage isolation transformer with electrostatic shield manufactured by Square D. One 120 V load center with eight factory-installed 20 A, 2-pole branch circuit breakers, field expandable to 16 circuits. One 208 V and 240 V load center with space for two 10 A, 2-pole through 60 A, 2-pole field-installed branch circuit breakers. NEMA Type 1 enclosure with Type 304 stainless steel trim. Two ISO-GARD microprocessor-controlled line isolation monitors (LIMs) manufactured by Square D. Factory-installed primary and secondary main circuit breakers. Factory-installed, copper reference ground bar. 2

3 June 2002 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Optional Accessories OPTIONAL ACCESSORIES ADVANTAGES CATALOG NUMBERS Interior Optional accessories include: Panel mounted indicator alarms for the panel s line isolation monitors. Alarms are commonly used when the panel is mounted within the operating room. Panel mounted receptacles. Up to six hospital grade, 120 V, convenience receptacles and up to two 208 V and 240 V receptacles can be mounted on the face of the panel Panel mounted 30 A, green ground jacks for grounding of non-electrical equipment. Advantages of dual output voltage isolation panel: Lower labor costs installation is simpler when one panel can be substituted for two separate panels. Lower material cost one panel rather than two separate panels reduces material costs. No bothersome inter-lock system the dual output voltage panel eliminates the need for interlocks that are common on conventional isolation panels designed for mobile X-ray and laser isolation panels. Lower leakage currents on 208 V and 240 V circuits because branch circuit conductors are shorter, leakage current is reduced. Easier maintenance only one isolation panel needs to be maintained. Less confusion during emergencies all circuit breakers are in one panel and one location rather than two or more panels or locations. To order dual output voltage hospital isolation panels, specify the correct catalog number for the following items: interior trim transformer back box NOTE: The interior, trim, transformer, back box, and optional panel mounted accessories for the LIM must be ordered separately. Only the accessories are optional. The interior catalog number is a combination of codes, which are described in Table 1 on page 4. An example of a completed catalog number for the interior is shown below in Figure 3. Interior Code Numbers (1) (2) (3) (4) (5) (6) (7) (8) Interior Catalog Number DVP 2 B R X D 208 V and 240 V Receptacle # 2 is NEMA Type 6 50R 208 V and 240 V Receptacle # 1 is Hubbell IN V Receptacles Colored Red Six 120 V Receptacles Six 30 A Green Ground Jacks Size Rating of 120 V Transformer Secondary is 7.5 kva Output Voltage is 120 V and 240 V Figure 3: Interior Catalog Numbers Primary Voltage 208 V 3

4 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Catalog Numbers June 2002 To complete a catalog number, fill in the parenthesis from the selections numbered 1 8 in Table 1. Table 1: Interior Catalog Number Selections Selection Number Options Selection Number Options (1) Primary voltage of dual output voltage isolation panel V 240 V 277 V 480 V (5) Number of 120 V power receptacles one two three four five six none (2) Output voltages A B 120 V and 208V 120 V and 240V (6) Type of 120 V power receptacles R I B T L 0 20 A, red hospital-grade duplex (NEMA 5 20R) 20 A, ivory hospital-grade duplex (NEMA 5 20R) 20 A, black hospital-grade duplex (NEMA 5 20R) 20 A, brown hospital-grade duplex (NEMA 5 20R) 20 A, black hospital only, locking-type receptacle (Hubbell #23000HG or equivalent) No 120 V receptacles (3) Size rating of 120 V secondary winding (kva) NOTE: Eight 20 A, 2-pole branch circuit breakers are installed at the factory in the 120 V section of panel s interior. The section is field expandable to 16 branch circuit breakers by ordering additional circuit breakers, Square D catalog no. QO kva 7.5 kva 10.0 kva (7) Configuration of 208 V or 240 V receptacle #1 NOTE: The correct circuit breaker that matches the selected receptacle is installed at the factory in the 208 V or 240 V section of the panel s interior. If no receptacle is selected, the section is field expandable to two branch circuit breakers by ordering additional circuit breakers, Square D catalog no. QO210 through QO260. X A B C D E F G 0 Hubbell #IN16494 (equivalent to Hubbell #25603) NEMA #6-15R NEMA #6-20R NEMA #6-30R NEMA #6-50R NEMA #L5-15R NEMA #L6-20R NEMA #L6-30R No 208 V or 240 V receptacle Installation of circuit breakers rated higher than 60 A voids the UL Listing. (4) Number of 30 A green ground jacks one two three four five six none (8) Configuration of 208 V or 240 V receptacle #2. The correct circuit breaker that matches the selected receptacle is installed at the factory in the 208 V or 240 V section of panel s interior. If no receptacle is selected, the section is field expandable to two branch circuit breakers by ordering Square D catalog no. QO210 through QO260. X A B C D E F G 0 Hubbell #IN16494 (equivalent to Hubbell #25603) NEMA #6-15R NEMA #6-20R NEMA #6-30R NEMA #6-50R NEMA #L6-15R NEMA #L6-20R NEMA #L6-30R No 208 V or 240 V receptacle Installation of circuit breakers rated higher than 60 A voids UL Listing. 4

5 June 2002 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Catalog Numbers Transformers All transformers for the dual output voltage isolation panels are single-phase only. Table 2: Transformer Catalog Number 120 V Winding Rating (in kva) Primary Voltage Secondary Voltages Catalog Number Recommended Maximum Feeder and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT and 120 DVT Trim Back Box The trim catalog number is DVC. The back box catalog number selections include: Flush back box DVBF Surface back box DVBS H1 H2 X4 X3 X2 X1 120 V 10 kva, 7.5 kva, 208 V or 240V 15 kva or 5 kva Figure 4: Primary 208 V, 240 V, 277 V, or 480 V Total of Both Secondary 20 V, 22.5 V, or 25 V 5

6 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Dimensional Drawing June 2002 DIMENSIONAL DRAWING Dimensions are shown in inches and millimeters Back Front INCHES Millimeters Shaded area denotes conduit entrance Left Side Maxiumum Above Floor Right Side Finished Floor Figure 5: Dimensions of Dual Output Voltage Isolation Panel 6

7 June 2002 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Electrical Connections ELECTRICAL CONNECTIONS Primary Circuit Breaker Electrostatic Shield H1 H2 X1 X2 X3 X4 Secondary Main Primary Panel is field expandable to 16 secondary branch circuit breakers (QO220) Secondary Main Panel is field expandable to 2 secondary branch circuit breakers (QO) To Ground Bus 208 V Circuit Ground Bus (space for 25, 6-24 A WG including 1 lug for 1/0) 120 V Circuit L1 L2 L3 Ground RS-232 Test Meter LIM Common 12 V Common 12 V Hazard 12 V Safe K1 Safe K1 Common K1 Hazard LIM Terminal Board To Ground Bus L1 L2 L3 Ground RS-232 Test Meter LIM Common 12 V Common 12 V Hazard 12 V Safe K1 Safe K1 Common K1 Hazard LIM Terminal Board To Ground Bus Figure 6: Electrical Connections 7

8 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Specifications June 2002 SPECIFICATIONS Part 1 General Refer to Square D Specification Section at under Specification (SCSI Standards) NOTE: Items in brackets are selections. Choose only one for your specific application Section Includes: A. Dual Output Voltage Hospital Isolation Panels B. Remote Indicator Alarms C. Power/Ground Modules D. Laser/Portable X-ray Receptacles 1.02 References: A. NFPA 70 National Electrical Code, Article 517 B. NFPA 99 Standard for Health Care Facilities C. UL1022 Line Isolation Monitors D. UL1047 Isolated Power System Distribution Equipment E. ANSI/IEEE Standard 602 Electric Systems in Health Care Facilities 1.03 Submittals A. Product Data: Provide ratings, transformer sound level, transformer impedance, transformer voltage regulation, transformer temperature rise, dimensions, knockout sizes and locations, materials, fabrication details, finishes, and accessories. B. Manufacturer s Instructions: Indicate application, conditions and limitations of use stipulated by product testing agency specified under Regulatory Requirements. Include instructions for storage, handling, protection, examination, preparation, and installation of Product Quality Assurance A. Perform work in accordance with National Electrical Contractors Association (NECA) Standard of Installation. B. Maintain [one copy] [_ copies] of this document on site Qualifications A. Manufacturer: 1. Supplier asking consideration as an approved equal shall submit full guaranteed performance data on similar units in service for one or more years. 2. Performance data to be submitted on each size required and received by the engineer no less than ten days before bid due date in order to allow acceptance by addendum. 3. All bids are to be based on specified equipment and show credit to be allowed to the owner if an approved substitute is used Regulatory Requirements A. Conform to current requirements of ANSI/NFPA 70 and NFPA 99. Contractor shall obtain and keep at the job site a current copy of NFPA 99. Contractor shall demonstrate familiarity with NFPA 99 to the specifying engineer. B. Furnish products listed and classified by [UL] [testing firm acceptable to authority having jurisdiction] as suitable for purpose specified as shown. 8

9 June 2002 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Specifications Part 2 Products 2.01 Manufacturers Dual Output Voltage Hospital Isolation Panels A. Manufacturers: Approved manufacturer for the various components of a complete isolated power distribution system shall be as listed herein. 1. Transformer shall be a shielded, low-leakage, dual output voltage, isolating transformer specifically manufactured for the use in hospital isolated systems, Class 7450 Isolating Transformer manufactured by the Square D Company. 2. Line isolation monitors (LIM) shall be ISO-GARD line isolation monitors (no exceptions) manufactured by Square D Company. 3. Circuit breakers shall be Type QO, QOB, Q1, FAL, or KAL as manufactured by Square D Company. 4. Remote alarm indicator shall be Square D Company Type IA-1C. 5. Power/ground modules shall be Square D Company catalog numbers RM-120-4NI,RMD-120-4NI, GS-120-4NI, RM-50-4NI, RMS-50-4NI, or RMD-50-4NI. 6. Laser/X-ray receptacle shall be Square D Company catalog number XR-IAI. B. Description NOTE: Paragraphs marked with asterisks (*) are alternatives. Select only those alternatives required for your specific application. 1. The panels shall be specifically designed for the purpose of supplying ungrounded power for use in hospital operating rooms. The panel shall consist of a flush- or surface-mounted back box, stainless steel trim, an ungrounded isolation transformer with two separate secondary windings (sized as indicated in the panel schedule or drawings), a primary main circuit breaker (sized in accordance with Article 450-3(b)(1) of NFPA 70), two secondary main circuit breakers, branch 2-pole circuit breakers as shown in the panel schedule or drawings, and two line isolation monitors (LIMs). 2. The LIM used in these units shall indicate, by alarm, when the total hazard current exceeds 5 ma. When the panel is mounted outside of the operating room, a two-station remote indicator alarm unit shall be located in the operating room and connected to the panel supplying power to the circuits in that room. When panel is located within the operating room, the indicator alarms shall be mounted within the cover of the panel. Location of the remote alarms within the operating room is as indicated on the drawings. 3. *A second indicator alarm unit shall be built into an annunciator containing indicator alarm units for all LIMs in the operating suite. This annunciator will be located at the operating room (OR) supervisor s station. 4. Power/ground modules as specified herein shall be used to distribute 120 V ungrounded power throughout the operating room. 5. Combination laser/portable X-ray receptacle with built-in indicator alarm for the LIM shall be used to distribute power for the laser or portable X-ray machine in the operating room. 9

10 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Specifications June Components The following components shall be provided by the manufacturer of the operating room hospital isolation panels as one integral unit. A. Isolation Transformers 1. The transformer shall be copper-wound with an electrostatic shield between the primary and secondary windings. The shield shall be grounded to the enclosure and the reference ground bar in the isolation panel. The electrostatic shield will be designed to prevent direct shorting of the primary winding to the secondary winding, and to reduce the coupling of harmonic distortions between the primary and secondary circuits. 2. The total leakage current to ground from the isolation transformer shall not exceed the values shown in Table 29.2 of UL Regulation to be certified not to exceed 2.5% at 0.8 power factor (PF) at 20 C above the full load continuous operating temperature in accordance with NEMA/ANSI standards. 4. The transformer is to be single-phase, 60 Hz. The isolation transformer shall be specifically designed with two secondary windings and voltages, either 120 V and 208 V or 120 V and 240 V. Refer to panel schedule, drawings, or both for correct primary and secondary voltages. The size rating of the 120 V secondary winding shall be as shown in the panel schedule, drawings, or both. The size rating of the 208 V or 240 V secondary winding shall be capable of supplying 60 A at the rated voltage. The use of isolation transformers with only one secondary winding and taps for the two required voltages will not be accepted. 5. Class H rated insulation shall be used in the manufacture of the transformer and the temperature rise will be limited to 80 C above ambient under full load conditions, when tested in accordance with NEMA/ANSI standards. Transformers must have a 180 C, UL Recognized insulation system. 6. The core shall be of stacked design and securely clamped and bolted. The core and coils shall be internally isolated from the enclosure by means of a suitable vibration dampening system, varnish impregnated, and shall have a final wrap of insulating material to prevent exposure of bare conductors. 7. The design sound level of the completed isolation panel shall not exceed 35 db. Certified sound level reports shall be furnished for each individual unit upon the request of the consulting engineer. B. Circuit Breakers 1. All circuit breakers must be 2-pole with a minimum interrupting capacity of 10,000 A. Panels shall have a maximum capacity of 16 secondary circuit breakers for 120 V equipment and a maximum capacity of two secondary circuit breakers for 208 V or 240 V loads such as lasers or portable X-ray equipment. Refer to the panelboard schedule for quantity and sizes of circuit breakers. All circuit breakers shall be thermal-magnetic type. Thermal-only type circuit breakers will not be accepted. C. Line Isolation Monitors (LIM) 1. The LIMs shall be the ISO-GARD Series D LIMs manufactured by Square D. The panel shall contain two LIMs, one for the 120 V secondary winding and one for the 208 V or 240 V secondary winding. The LIMs shall use microprocessor-based digital signal processing to continually monitor the impedance from all secondary 10

11 June 2002 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Specifications conductors of the isolated power systems to ground. The LIM shall be capable of measuring all combinations of capacitive and resistive faults including balanced, unbalanced, and hybrid faults. LIMs that internally switch between either line and ground will not be accepted. The LIM shall not contribute more than 15 microamperes to the total hazard current of the system being monitored. 2. The LIMs shall have the following specifications: a. Operating voltage to 265 Vac b. Accuracy % or better c. Alarm level or 5 microamperes (selectable) d. Alarm bandwidth Zero (0) e. Alarm hysteresis (on/off).. 50 microamperes f. Mode Single- or three-phase g. Monitor hazard current microamperes h. Operating frequency or 60 Hz 3. All of the listed LIM specifications shall be contained within one unit and be user selectable, allowing the LIMs to be interchanged from system to system. 4. The LIMs shall incorporate a momentary test switch. When pressed, it shall check and recalibrate the unit. Additionally, the test switch shall perform a complete test of all indicating lamps and meters on the face of the LIM and at any remote indicating stations. 5. The LIMs shall use digital signal processing to determine the hazard current of the system being monitored. The microprocessor within the LIM shall be #MC68HC16Z1 as manufactured by Motorola. The algorithms used to determine the system hazard current shall be preprogrammed into the LIM s microprocessor. At least every 65 minutes, the unit shall recheck its calibration and recalibrate the system to original performance specifications. Additionally, when the LIM s momentary test switch is pressed, an immediate check and recalibration of the LIM shall be performed. 6. If internal components are more than 30% out of original specifications because of aging or failure, the LIM shall notify the user by displaying a unique error code, eliminating the need for periodic manual testing to determine the unit s integrity. LIMs that use analog signal processing technology and/or require manual testing or recalibration will not be accepted. 7. The LIMs shall have an optical infrared LED-type serial port on the face of the unit for transmitting pertinent LIM and isolated power system data directly to a personal computer (PC). The transmission of data shall not require any mechanical or direct electrical connection to the LIM. The protocol of data transmission shall be compatible with all Hewlett Packard palmtop personal computers including Hewlett Packard models HP95LX, HP100LX, and HP200LX. 8. The LIMs shall provide both analog and digital indication of hazard current of the isolated power systems. Digital indication shall be provided by a digital meter and analog indication shall be provided by an LED bar-graph type meter calibrated from 0 (zero) to 160% of the alarm setting of the LIM. LIMs with only analog or only digital indicating will not be accepted. 9. The LIMs shall have a green safe light and red hazard light on the front panel. The red hazard light shall remain illuminated for the duration when the isolated power system hazard current is above the 11

12 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Specifications June 2002 selected alarm level of the LIM. An audible alarm shall be incorporated into the unit and shall activate in conjunction with the red hazard light. The audible alarm shall have high, low, and off settings. A silence button shall be provided on the face of the unit to silence the audible alarm during fault conditions. When the audible alarm is silenced, a yellow indicating light shall illuminate to indicate the audible alarm has been silenced. The red hazard light and yellow silence light shall automatically reset when the fault condition is eliminated. During fault conditions, the red hazard light and all red segments of the LED bar graph shall blink at a constant rate. All lamps are to be long-life LED type. 10. A set of normally open and normally closed contacts, rated 3 A at 120 Vac shall be provided on the LIMs for use with external alarm systems. The LIM shall also provide a 12 Vac output signal rated at 10 VA to power remote indicator alarm units. This 12 Vac output signal shall not increase the hazard current of the system being monitored. Provisions for connection of the remote metering shall also be provided as part of the LIM. These connections shall have the ability to operate either an analog or digital type remote meter. 11. The LIMs shall incorporate a loss-of-ground feature which will activate the audible and visual alarms when connection is lost with the reference ground of the isolated power system being monitored. In addition to activating the alarm, the unit shall display an error code in the digital display of the LIM. 12. All switches, meters, and indicating lamps shall be flush with the face of the LIMs to provide a neat and clean appearance. The entire front face of the unit shall have a polymer overlay that protects the unit from the intrusion of housekeeping cleaning agents. LIMs with exposed fuses, meters, switches, or circuit breakers will not be accepted. 13. The design of the LIM shall consist of two circuit boards interconnected by a ribbon connector. The two boards shall contain all of the unit s electrical components and be mounted in the rear housing of the LIM. A phenolic cover shall complete the assembly. The unit shall not contain any components, such as circuit breakers, meter, switches or indicating lamps, which are mounted on or attached to the front cover of the LIM. Access to the inside of the LIM shall be through the front of the unit, eliminating the need to remove the unit from its mounting position to change any of the settings. Unique fasteners shall attach the front cover of the unit to prevent unauthorized access to the interior of the LIM. 14. The LIMs shall be specifically designed for the connection of two units to one isolation transformer. The units shall not give false readings nor interfere with each other s hazard current measurement process when both are simultaneously connected to one isolation transformer. 15. Dual output voltage isolation panels with only one LIM monitoring both voltages will not be accepted. 16. The LIMs shall be manufactured by Square D Company, UL Component Recognized under UL1022 Standard for Line Isolation Monitors, and UL Recognized as meeting CSA 22.2, the Canadian Standard for Line Isolation Monitors. D. Optional Panel Mounted Power/Ground Module The panel shall be designed to accommodate not more than six 30 A green equipment ground jacks, six 120 V, 20 A hospital-grade power receptacles (either single, duplex, or hospital-only type configuration) and 12

13 June 2002 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Specifications two 208 V and 240 V, 10 A through 60 A power receptacles for laser or portable X-ray use. Refer to the drawings, panel schedule, or both for exact quantity, color, circuiting, and NEMA configuration of the receptacles. E. Remote Indicator Lamp 1. The remote indicator alarm shall be flush mounted and have a brushed stainless steel front trim. When the hazard current is within the predetermined limit for the circuits being monitored, a constant green light will remain illuminated. When the limit is exceeded, the green light will extinguish, a red indicator will illuminate, and an audible signal will sound. 2. A silencing switch for the audible signal shall be provided. When pressed, it will cause a yellow warning light to illuminate, indicating that the audible signal has been silenced. When the current flow to ground returns to an acceptable level, the unit will automatically reset. The wiring from the LIM to the indicator alarm shall not contribute any leakage current to the isolated system Construction A. Enclosures 1. The enclosure shall be 14-gauge steel which is degreased, phosphatized, primed, and finished with baked enamel paint. The front trim shall be Type 304 stainless steel with a #4 brushed finish and shall completely cover all components of the isolation panel including the LIM and circuit breakers. The enclosure will be flush mounted unless otherwise stated on the plans. The front trim shall have a hinged door, with keyed lock, to allow access to the circuit breakers, the LIM, and to provide for testing. For life support purposes and to prevent unauthorized access to the LIM or circuit breakers, panel trim designs that do not completely cover these items, or do not have a lockable door, will not be accepted. 2. For purposes of infectious bacterial growth control, the front panel trim shall not contain any grille, louver, or opening of any type for ventilation. The isolation panel shall be a totally enclosed nonventilated type design. The panel and transformer shall be so designed that heat generated by the transformer under full load conditions shall not affect the normal operation of the circuit breakers and LIM. The maximum front panel temperature shall not exceed 30 C rise under full load continuous operation. Certification of this temperature test shall be provided to the consulting engineer upon request. The entire section behind the hinged door shall be of a dead front design. All hinges will be concealed. B. Wiring 1. Manufacturer s wiring within all panels shall meet all applicable National Electric Code (NEC) and UL Standards. Low leakage insulation shall be used on all secondary wiring. The total leakage for the isolation panel shall not exceed the values shown in Table 29.1 of UL Total leakage of the manufactured isolation panel shall include the following items: isolation transformer, load center, branch circuit breakers, and any panel mounted accessories. Field wiring by the installing contractor shall not be included. 2. Upon request of the specifying engineer, the panel manufacturer shall provide certified test data on each individual panel as to maximum leakage of each complete assembly. 13

14 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Specifications June Accessories A. Remote Power /Ground Cables 1. For the correct location and quantity of remote modules, refer to the drawings. The module back box shall be fabricated of mild steel. When the module is surface mounted, the back box shall have a finished appearance, all seams are to be welded, and the weld seams ground smooth with the outer surfaces of the box. Boxes shall be degreased, primed, and receive a final coat of baked enamel. The trim shall be 14-gauge, Type 304 stainless with a #4 brushed finish. 2. The only exposed screws on the trim of the module shall be the four screws holding the trim to the back box. All receptacles shall be firmly attached with concealed fasteners that do not appear on the surface of the trim. The ground bus contained in these modules shall be of heavy copper bar, and it shall contain lugs suitable for connection of up to #1/0 wire. These are for connection and grounding of nonelectrical conductive surfaces in the area, as well as connection of the ground terminal on all power receptacles within the module or in the area. All wiring in the module shall be color-coded in compliance with the NEC and NFPA 99. The module shall be capable of containing 30 A green ground jacks, hospital-grade duplex receptacles, or locking hospital-type receptacles. Modules shall be mounted between 42 and 60 inches above finished floor. B. Combination laser/portable X-ray Receptacle and C Indicator Alarm 1. Combination laser/portable X-ray receptacle and Indicator Alarm shall be Square D catalog no. XR-IAI, with back box catalog no BB. The unit shall contain a 60 A receptacle for laser or portable X-ray use and indicator alarm connected to the LIM in the isolation panel that is monitoring the 208 V or 240 V portion of the isolation transformer. The receptacle shall be configuration equivalent to Hubbell # Entire unit shall be mounted between 42 and 60 inches above the finished floor. Part 3 Execution 3.01 Installation A. The contractor shall furnish and install the dual output voltage isolation panels, power/ground modules, laser receptacles, and portable X-ray receptacles in the locations and elevations as indicated on the drawings. Location and elevation of these items cannot be changed without written permission from the specifying/consulting electrical engineer and architect. B. The panel(s) shall be factory wired and tested and include a shielded lowleakage isolation transformer, primary and secondary circuit breakers, LIMs, receptacles, ground jacks, and ground bars. C. To help prevent bacterial growth, back boxes for panels, accessories, switches, receptacles, and fixed equipment shall be cleaned of any accumulated dirt, dust, plaster, and debris before installation of front trims. D. The contractor shall wire all external receptacles to the panels using copper stranded conductor having a cross-linked polyethylene insulation or equivalent with a dielectric constant of 3.5 or less. Under no circumstances shall wire pulling compound be used when pulling the conductors for the branch circuits. All wiring shall be color-coded in accordance with the applicable paragraphs of the current editions of the NEC and NFPA 99. All branch circuit conduit runs shall be installed using the shortest path possible to the intended load or receptacle to minimize leakage currents. Contractor shall measure and demonstrate compliance with the requirements of Impedance of Isolated Wiring as described in Chapter 3 of NFPA 99 (no exceptions). The contractor shall submit wire 14

15 June 2002 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Specifications manufacturer s product data sheets to the specifying engineer for approval before installation of any isolated power branch circuit conductors. E. Connecting conduits shall not be used to support the panels, remote indicators, power/ground modules, or laser/portable X-ray receptacles. F. Steel support members as required shall be provided and installed by the electrical contractor for mounting the panels. G. All equipment shall be aligned, leveled, and securely fastened to the support members. H. Any unused conduit opening or other unused holes in the back boxes shall be properly closed by the contractor before final owner acceptance Testing By The Manufacturer A. The contractor shall include the cost of, and make all arrangements for, testing all underground isolated systems in the hospital by a qualified factory technician provided by the manufacturer of the isolation systems. The testing shall include a complete inspection of all connections and materials used. The contractor shall be prepared to demonstrate to the factory technician that proper polarity was observed, and installation practices were in accordance with the drawings and specifications for these systems. B. The factory technician shall check and record system current leakages. The factory technician shall further simulate faults on the isolated system of a magnitude high enough to bring the total system leakage, which the LIM detects, above the calibrated point, thus verifying correct operation of the LIM. The faults simulated shall be combinations of resistive and capacitive faults. C. The factory technician shall check the resistance between the ground point of each receptacle and the reference point, and it shall be less than 0.1 ohms. The voltage potential difference between any exposed conductive surfaces in the patient vicinity shall be checked, the difference to be no more than 40 millivolts. These tests are required by NFPA 99 for new construction areas. D. The factory technician shall instruct the hospital maintenance staff in the use of the following: 1. The panel and LIM as a leakage measuring device 2. How instrument leakage can be measured by use of the LIM 3. How to perform leakage tests E. The technician shall also test the system impedance of the entire isolated power system to ensure compliance with the applicable sections in Chapter 3 of NFPA 99. The measured system impedance shall become part of the permanent logged records of each panel. F. After all tests are complete, a letter shall be given to the hospital and the consulting engineer. The letter shall state that the system conforms with all codes, good installation practices, and the specifications. G. Upon completion of all tests, the factory technician shall meet with hospital medical and maintenance staff to thoroughly explain the operation of the equipment installed, and the need and procedure for periodically testing and logging test results. The technician shall furnish log books to the maintenance department, enter the first readings of all panels in these log books, and clearly instruct the hospital maintenance staff how to enter future readings. H. All questions from the hospital staff shall be answered completely and thoroughly at this time. The consulting engineer shall be notified of the dates and times of all tests so the consulting engineer may witness any of the tests or meetings conducted by the factory technician. 15

16 Hospital Isolated Power Systems, Dual Output Voltage Isolation Panels Data Bulletin June 2002 Square D Company 1010 Airpark Center Drive Nashville, TN SquareD ( ) Electrical equipment should be serviced only by qualified personnel. No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this material. June 2002 Replaces 4817PD9601 dated 10/96. 16