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Scope
The contractor shall furnish and install a complete
Duplex Isolated Power System as indicated on the plans and specified herein.
Codes and Standards
The isolated power system shall be designed and installed in accordance with the latest edition of the following codes and standards:
- NFPA 99 "Health Care Facilities"
- NFPA 70 "National Electrical Code"
- UL Standard 1047 "Isolated Power System Distribution Equipment"
- UL Standard 1022 "Line Isolation Monitors"
Isolated Power Panel
The
Duplex Isolated Power Panel shall be PG LIFELINK
Model DIDP. The panel shall be UL listed under Standard 1047 and shall incorporate the following features and components:
- Enclosure shall be a three-piece assembly consisting of back box, chassis and front trim. The back box shall be fabricated of galvanized steel in accordance with UL Standard 50, "Standard for Cabinets and Boxes" and shall be flush mounted, unless indicated otherwise, at the elevation shown on the plans. The back box depth shall not exceed 6 inches for 5 and 7.5 KVA panels, and 12 inches for 10 and 15 KVA panels. All internal electrical components shall be mounted on a galvanized steel chassis which bolts onto studs located in the back box. The front trim shall be made of 12-gauge stainless steel polished to a # 4 satin finish and shall include a lockable door over each circuit breaker panelboard.
- Isolation Transformers shall be single phase, 60 Hz, The Critical Power transformer shall be ________ KVA (specify 3, 5, 7.5, 10, or 15) with _______ volt primary (specify 120, 208, 220, 240, 277, or 480) and _______ volt secondary (specify 120, 208, 220 or 240). The Normal Power transformer shall be _______ KVA (specify 3, 5, 7.5, 10, 15) with _______ volt primary (specify 120, 208, 220, 240, 277, or 480) and _______ volt secondary (specify 120, 208, 220 or 240). The transformers shall be of stacked core design with an electrostatic shield between the primary and secondary windings. For transformers 5 KVA and smaller, the leakage current shall not exceed 10 microamperes, and the noise level shall not exceed 25 dB; the 7.5 KVA transformer, shall not exceed 14 microamperes and 27 dB; the 10 KVA shall not exceed 25 microamperes and 35 dB; and the 15 KVA shall not exceed 30 microamperes and 35 dB.
- Line Isolation Monitors shall be the PG LIFELINK Mark IV self-testing and self-calibrating LIM. Each LIM shall continuously monitor the impedance from each secondary conductor to ground without the use of switching circuitry and shall display the total hazard current of the system on an ammeter. The LIM shall be capable of detecting all combinations of resistive and capacitive faults whether they are balanced, unbalanced or hybrid. The LIM shall not contribute more than 25 microamperes to the total hazard current of the system. The LIM shall alarm when the total hazard current (THC) reaches a value of 5 milliamperes (ma). When the THC is less than 5 ma, a green light shall be illuminated indicating normal conditions. Should the THC reach 5 ma, a red light shall illuminate and a buzzer shall sound indicating an alarm. A silence switch shall be provided to quiet the buzzer while leaving the red light on. A yellow light will remain on while LIM is in the silenced mode. The LIM shall automatically reset to normal status when the fault condition is corrected. The LIM shall also detect and signal an alarm if the ground connection to the LIM is broken. A momentary test switch shall be provided for periodic testing of the LIM circuitry. The LIM shall be flush mounted on the front of the panel so that the LIM signals are clearly visible at all times. The LIM signals must not be obscured when the circuit breaker door is open.
The LIM shall be recognized under UL Standard 1022.
- Primary main circuit breaker shall be provided for each transformer.
- Branch circuit breakers shall be 20 amp, two-pole, quantity ______ (16 max.) for the Critical transformer
and ______ (16 max) for the Normal transformer. Only Bolt On Breakers will be considered.
- Reference ground bus having 24 branch taps for #12 to #6 wires shall be provided for each panel. The
Critical ground bus must be connected to the Normal ground bus with a minimum #10 ground wire.
Wiring
All components within the
Duplex Isolation Panel shall be pre-wired using low leakage type XHHW wire. A barriered compartment shall be provided for the incoming primary feeder and separation shall be maintained between grounded and ungrounded conductors. A terminal block shall be provided for connection of remote signal conductors.
All Branch Circuit Conductors of the isolated power system shall be stranded copper having a cross-linked
polyethylene insulation, or equivalent with a dielectric constant of 3.5 or less. Type XHHW is suitable for
this purpose. Each branch circuit conductor shall be color-coded in accordance with National Electrical Code. Wire pulling compound produces an adverse effect upon the dielectric constant of conductor insulation and shall not be used when pulling the wire of the isolated power system. Use of dry talcum powder is permitted.
Accessories
The following accessories are part of the isolated power system and are to be furnished where indicated on
the plans.
When the Duplex Isolated Power Panel is mounted outside of the operating room, two
remote annunciators must be installed inside the operating room. Remote Annunciator Panels shall be
Model _______ (specify DRA or DRA-S). The panels shall provide remote indication of the line isolation monitor
signals and shall consist of red, green and yellow indicating lights, buzzer and silence switch, and shall be
mounted on a stainless steel trim. A microammeter with remote test switch shall also be included with Model DRA-S.
Master Remote Annunciator Panel, Model DMRA shall be furnished to provide centralized monitoring of the isolated power systems at the nurse station. The panel shall have one set of red, green and yellow indicating lights and silence switch for each LIM to be monitored, and shall be mounted on a stainless steel trim. A buzzer shall provide audible annunciation of an alarm.
Power and Ground Module/Remote Receptacle Panel, Model RRP, shall be furnished where indicated on plans.
Module shall contain _______ (specify quantity) power receptacles, type ____________ (specify 8300-R duplex, 23000HG twist lock, or 8310 single parallel blade), and ______ (specify quantity) ground jacks. Devices shall be mounted on a stainless steel trim.
Ground Module, Model RRP, shall be furnished where indicated on plans. Module shall contain ______ (specify quantity) ground jacks mounted on a stainless steel trim and shall include a galvanized steel back box. A copper ground bus with 18 terminals for wire sizes #14 to #6 and a #14 to #1/0 main lug shall be included.
Ground Module/Ground Jack Panel, Model GJP, shall be furnished where indicated on plans. Module shall contain ______ (specify quantity) ground jacks mounted on a stainless steel trim to fit a standard gang box and a #14 to #1/0 main lug shall be included.
Master Ground Module, Model GJB-24 shall be furnished where indicated on the plans. Module shall consist of a
galvanized steel back box, stainless steel front, and a copper ground bus with 24-terminals for wire sizes #14 to #6 and a #14 to #1/0 main lug.
Furnish ______ (specify quantity) Ground Cord Assemblies. Each cord shall be ______ feet (specify 5, 8, 10, 12, 15, or 20), and shall consist of an extra flexible copper grounding conductor insulated with green neoprene having a ground plug on one end and a _____________ (specify ground lug or insulated alligator clip) on the other end.
Test and Certification
Upon completion of the installation, a qualified factory technician shall inspect and test the equipment to verify that it is properly installed and operating as specified. A field test report and written certification that the system was installed and operating properly shall be furnished. The factory technician shall also instruct the hospital personnel in the proper use and maintenance of the equipment.
Approved Manufacturers
This specification is based on equipment manufactured by PG LIFELINK. Products of other manufacturers will be considered provided they are equal in all respects and request for approval is submitted in writing to the engineer at least 10 days prior to the bid date.
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