1.4
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Zr
16950-2
TESTING ELECTRICAL SYSTEMS AND START-UP
3. Check for tools inside equipment or enclosures. All screw, bolt, and terminal
connections shall be checked for tightness as specified by the equipment
manufacturer.
4. Check the bearings of all rotating electrical apparatus and, if required, have
supplier fill with the grease or oil as recommended by the manufacturers.
5. All motors, contacts, relays, bus, insulators and other electrical apparatus shall
be cleaned and dried out if required and/or needed. Drying out methods will be
such that the insulation temperature of the apparatus does not exceed 90°C.
Prior to applying voltage to any apparatus or circuit, make insulation resistance tests
and, if necessary, dry the apparatus until resistance values conform to the standards
of IEEE.
In case of a low resistance circuit insulation, eliminate the problem before the circuit
is energized.
Provide 1000 volt "Megger" insulation testing on all 600 volt feeder conductors and
motor power conductors. This shall include any and all of the existing electrical
feeder cables at the facility which shall remain and shall be reconnected. Motors
shall be meggered from the starters.
Provide 2500 volt "Megger" insulation testing for all heat trace cabling to be
installed at all locations as shown on the Drawings.
"Megger" test all required service feeder cables and circuit wiring at the existing
facility in their entirety and submit a complete test report. Test voltage shall be
applied until readings reach a constant value, and until three (3) equal readings, each
one (1) minute apart, are obtained. Minimum megger reading shall be 45 megohms
for feeder conductors.
Three phase panelboard’s line currents shall be balance to within 10% of each other.
Three phase motors shall be checked for rotation and, if necessary, reverse the
connections at the starter. Single phase and DC motors at motor connection box.
All main plant building loops and major equipment grounds shall be tested to remote
earth or directly referenced to an extremely low resistance (approximately 1 ohm)
reference ground bench mark. Tests shall be made with ground testing ohm meter
or "megger" approved by the Engineer for the purpose.
The Contractor shall provide load readings for all equipment, switchgear, motor
control centers and panelboards.
Panelboard line currents shall be balanced within 10%.
Test and set all motor circuit protectors, motor overload heaters to the nameplate
horsepower of the equipment; and all circuit breaker settings in all electrical
equipment shall be tested and verified operational.
Adjust all settings on protective equipment and verify, check and establish with the
power company that the secondary voltage is within 2% of rated voltage.
Provide and check all overload relays settings and sizing for all motors and submit
this data to the Engineer for final approval. This shall include settings and
adjustments to MCP devices for each motor starter.
DEMONSTRATION AND START UP
A.
B.
All equipment shall be properly identified as indicated in SECTION 16010.
When directed by the Engineer, demonstrate the total system operation and make
final adjustments to the system. If any system or piece of equipment within a system
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