Specifications

PIP ELTFT01
March 2001 Field Inspection and Testing of
New Electrical Equipment
Process Industry Practices Page 11 of 23
7.4 Function Test Items
7.4.1 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 by functional testing.
2. Trip circuit breaker individually from each local protective device.
3. Test any special circuits such as main-tie-main controls.
7.4.2 Function-test circuit breaker in normal operating position before
energization of bus.
7.4.3 When resistance-grounding systems are installed, function test the
equipment using the available protection/alarm test features.
8. Power Transformers
8.1 Equipment and Installation Check Items
8.1.1 Check all components for proper identification per the drawings and
specifications.
8.1.2 Check transformer nameplate rating, impedance, and available tap positions.
8.1.3 Check transformer case including cooling fins, primary terminal enclosure,
or switch enclosure for any external mechanical damage.
8.1.4 Check transformer tank, cooling fins, and all other welded or bolted joints
under oil for evidence of oil leakage.
8.1.5 Check all valves, fittings, and gasket surfaces for tightness and for any
evidence of oil leakage.
8.1.6 Check transformer unit for inclusion of all standard auxiliary items
according to the purchase specification.
8.1.7 Check transformer secondary terminal box for adequate weatherproofing.
8.1.8 Check primary terminal enclosure for adequate weatherproofing and bolting.
8.2. Equipment and Installation Inspection Items
8.2.1 Inspect operation of tap changer unit.
8.2.2 Inspect transformer level indicator for proper oil level.
8.2.3 Inspect transformer liquid temperature indicator and transformer pressure-
vacuum indicator for appropriate readings.
8.2.4 Inspect ground connection to transformer ground pad and to transformer
secondary neutral if applicable.
8.2.5 If supplied, inspect ground resistor and ground CT mounting and their
connections.