Specifications

PIP ELTFT01
March 2001 Field Inspection and Testing of
New Electrical Equipment
Process Industry Practices Page 17 of 23
11.3.3 Test insulation resistance of contactor (closed position) with a 1-minute test
(phase to phase and phase to ground).
11.3.4 Test contactor contact resistance with micro-ohmmeter.
11.3.5 Test integrity of each vacuum interrupter on a vacuum contactor in
accordance with manufacturer's instructions.
11.3.6 Calibrate and test each protective relay with settings on devices being in
accordance with approved relay settings summary or coordination study.
11.3.7 Test contactor drop-out time if power disturbance ride-through is specified.
11.3.8 Test operation of all space heaters including switching and indicating
devices.
11.3.9 Test CT circuit by applying current to the CT primary circuit and verifying
operation of all applicable relays and metering devices. When primary
current injection is not practicable because of size of current requirements,
test CT secondary circuit by applying current to CT secondary circuit with
CT disconnected, and verify operation of all applicable relays and metering
devices. Test window-type ground CTs and their circuits by applying current
to a conductor passed through the window.
11.3.10 When specified on the Data Sheet, perform a CT ratio-verification test using
the voltage or current method in accordance with ANSI C57.13.1.
11.3.11 Test voltmeter, ammeter, and related selector switches when installed.
11.3.12 Test proper operation of overload protective device. Operate mechanical trip
option if present.
11.4 Function Test Items
11.4.1 Function-test each contactor in the test position:
1. Close and trip contactor with all local and remote control devices.
Verify operation of all auxiliary devices by functional testing.
2. Trip contactor from each protective device individually. Verify
operation of all auxiliary devices.
11.4.2 Verify operation of capacitor discharge resistor system on power factor
capacitors using a properly sized voltmeter.
12. Motors
12.1 Equipment and Installation Check Items
12.1.1 Check motor nameplate hp, voltage, full load amps, and service factor.
12.1.2 Check motor rotation arrow to verify that it conforms to driven equipment
requirements.
12.1.3 Check motor ground connections.