GE Industrial Solutions Evolution Series E9000 - Manual (Page 19)

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Evolution Series E9000 Installation & Maintenance Guide
Chapter 4 – Operation
Preparing for Initial Operation
In addition to the normal circuit checking after wiring is
completed, the following specific actions should be
taken before energizing the equipment:
1. Check and tighten any electrical connections, such
as lugs and bus splices that may have loosened
during shipment, handling and installation. Torque
values are provided on or adjacent to components or
lugs. See torque labels in MCC vertical wireway door.
2. Operate each magnetic device by hand to verify
that all moving parts operate freely. Check all elec-
trical contacts for proper operation.
3. Current transformers are shipped with a shunt
across the secondary if the circuit is not complete.
Remove the shunt after completing the connections
to the transformer secondary.
4. Verify that the horsepower and voltage rating of
the motor agree with the rating stamped on the
starter unit to which it is connected.
5. Check each overload heater or electronic overload
relay setting against the motor full-load current.
6. Check all circuit breaker trip settings and fuse ratings
against the drawings supplied with the equipment.
a. If trip settings must be changed, use the GE rating
plug extractor tool (catalog number TRTOOL) to
remove rating plugs from Spectra circuit breakers.
b. See the startup procedure following information
regarding instantaneous trip settings on magnetic-
only circuit breakers.
7. Check all pneumatic or motor-driven timers for
proper time-interval settings.
8. Manually operate all branch-circuit disconnects
and verify proper operation of disconnects and
door interlocks.
9. Where applicable, manually trip all circuit breakers
to verify that operating handles move freely to the
TRIP indicating position. With the door closed and
latched, reset each tripped circuit breaker by pushing
the operating handle down beyond the OFF position.
The operating handle should move upward to the
OFF position after the breaker has been reset. After
the reset, turn the circuit breaker ON and then OFF
to confirm proper operation.
10. Visually check all units and enclosures to ensure
that electrical spacings have not been reduced
because of shipping and handling actions.
11. Verify that the motor control center enclosure and
units are grounded.
12. Replace all protection barriers and panels that have
been removed during installation.
13. Carefully clean the equipment interior with a clean
cloth, soft brush or vacuum cleaner to remove all
metal chips, dust, wire and other debris.
14. After taking precautions to prevent accidental contact
with the motor control center buswork, conduct the
following insulation-resistance test with a 1000 Vdc
(Megger) tester. With all disconnects in the OFF position,
• Apply voltage between all phase pairs.
• Apply voltage between each phase and ground.
All readings should be 1 megohm minimum; typical
values will be 50–100 megohm but may vary
based on humidity.
Similarly, test individual feeder and motor circuit
wiring (field wiring) as each set of conductors is
pulled into the motor control center, before termi-
nating the conductors at either end.
15. With all disconnects OFF, close and latch all doors
and secure all external covers.
Initial Operation of the Motor Control Center
Use the following procedure for initial startup of the
motor control equipment. Be sure that the steps in the
previous section, Preparing for Initial Operation, have
been completed.
1. Ensure that all doors are closed and latched and all
external covers on the motor control center are
secured.
2. Verify that all main and branch disconnects within
the motor control center are OFF.
3. Verify (with an insulation-resistance tester) that all
main incoming feeders to the motor control center
are adequately insulated.
4. Close the upstream feeder to energize the motor
control center.
Because of problems that may occur during
the initial energizing of the motor control
equipment, only qualified personnel should
carry out this startup procedure.
Do not exceed the long-time and/or instanta-
neous trip settings stipulated in the National
Electrical Code and as identified in the overload
heater selection tables in this manual.
Check current transformer-operated overload
relays to be certain that overload heaters are
in place. Do not operate starters without
overload protection.