Specifications

PIP ELTFT01
Field Inspection and Testing of March 2001
New Electrical Equipment
Process Industry Practices Page 20 of 23
13.3 Testing Requirements
13.3.1 Test insulation resistance of switchgear bus with a 1-minute test (phase to
phase and phase to ground).
13.3.2 Test insulation resistance of each circuit breaker (closed position) with a
1-minute test (phase to phase and phase to ground).
13.3.3 Test circuit breaker contact resistance with a micro-ohmmeter.
13.3.4 Test insulation resistance of all instrument transformers with a 1-minute test.
13.3.5 Calibrate and test each circuit breaker protective device with settings
according to drawings and specifications.
13.3.6 With CT disconnected, test CT secondary circuit for continuity and
operation of applicable relays and meters by applying current to the CT
secondary winding.
13.3.7 Test PT secondary circuit by applying voltage to the PT secondary, with PT
disconnected, verifying operation of all applicable relays and meters.
13.3.8 Test window-type ground CTs and their circuits by applying current to a
conductor passed through the window.
13.3.9 Test operation of all space heaters including switching and indicating
devices.
13.4 Function Test Items
13.4.1 Function-test circuit breaker in test position:
1. Close and trip circuit breaker from its local and remote control devices.
Verify operation of all auxiliary devices through functional test.
2. Trip circuit breaker individually from each local protective device.
3. Test any special circuits such as main-tie-main controls.
13.4.2 Function-test each circuit breaker in the operating position before connecting
load side leads. Close and trip circuit breaker from all local and remote
control devices. Verify proper operation of all auxiliary devices.
14. Low-Voltage MCCs and Switchracks
14.1 Equipment and Installation Check Items
14.1.1 Check MCC or switchrack installation for alignment, levelness, and
tightness of all bolting.
14.1.2 Check all equipment for removal of blocking, supports, temporary ties, and
temporary jumper wires.
14.1.3 Check door alignment of individual MCC units and door interlock operation.
14.1.4 Check all components for proper identification according to the drawings
and specifications.