Scope
The contractor shall furnish and install a complete 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 isolated power panel shall be PG LIFELINK Model ___________
(specify IDP or IDC). 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 10 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 the circuit
breakers.
- Isolation Transformer shall
be single phase, 60 Hz, ________ 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 transformer shall be of stacked core design with an electrostatic
shield between the primary and secondary windings. 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 25 dB; and the 15 KVA shall not exceed
30 microamperes and 25 dB.
- Line Isolation
Monitor shall be the PG LIFELINK Mark IV Self-Testing and
Self-Calibrating LIM. It 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.
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.
- Branch circuit
breakers shall be 20 amp, two-pole, quantity ______ (16 max.).
- Reference ground
bus having 24 branch taps for #12 to #6 wires shall be provided.
- Power receptacles
shall be provided on the front of the panel (Model IDC only). Receptacles
to be 20 amp, 120 volt, type ____________ (specify 8300-R duplex,
23000HG twist lock, or 8310 single parallel blade), quantity _______
(8 max.).
- Ground jacks shall
be provided on the front of the panel (Model IDC only). Jacks to
be Hampden SLR-3S, quantity ______ (7 max.).
Wiring
All components within the 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 isolated power panel is mounted outside of the operating
room, a remote annunciator must be installed inside the operating room.
Remote Annunciator Panel shall be Model _______ (specify DRA or DRA-S).
The panel 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 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 isolated power system 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.
