GE Power Management
SPM Synchronous Motor Protection & Control
7-
1
7 TESTING AND TROUBLESHOOTING
7.1 START-UP PROCEDURE
7
7 TESTING AND TROUBLESHOOTING 7.1 START-UP PROCEDURE
7.1.1 INSPECTION
Inspect all wiring and verify that the connections are clean, tight, and there is adequate clearance for all de-
vices. All external wiring from the controller must be made in strict accordance with the main connection dia-
gram supplied with the controller.
While referring to the main connection diagram supplied with the controller, inspect the wiring to determine with
certainty that the starting and field-discharge resistor is connected in the motor field-discharge circuit through
the discharge (closed) contact of the field-applying contactor (FC).
While inspecting the field contactor, manually pick up the contactor and confirm that the normally-closed con-
tactor pole opens after the two normally-open poles close. It is important that all three poles are closed
momentarily (overlap) during contactor pick-up and drop out (closed transition contacts).
To clean the face of the SPM, wipe with a damp cloth and mild detergent.
7.1.2 SPM TEST CHECKS
After the wiring check is complete, the equipment may be energized but DO NOT START MOTOR. With con-
trol power on, carefully follow the procedures below.
DO NOT TOUCH ANY CONNECTION POINT AT THE REAR OF THE SPM. POTENTIALS UP TO
1000 V MAY BE PRESENT ACROSS INPUTS
V
F
+ AND
V
F
–.
a) STANDBY MODE
1.
Apply control power ONLY (do NOT start the motor).
2.
The unit should power up and indicate that it is performing its power-on self-test. When this test is success-
fully completed, the motor type is shown (collector-ring or brushless) and
SPM READY
should be blinking on
the display. If not, then a problem exists with the microprocessor or a peripheral device.
3.
Obtain a list of the factory programmed setpoints and review the SPM setpoints. See Section 5.2: SET-
POINTS MENU on page 5–2 for information on setpoints.
b) TEST MODE
Built-in diagnostics ensure the unit is operational prior to start-up. The SPM is placed in
TEST MODE
as follows:
1.
Press the GE key to enter the
STAT MODE
menu.
2.
Press the GE key again to enter the
PROGRAMMING MODE
menu.
3.
Press the GE key one more time to enter the
TEST MODE
menu.
4.
Select the required test then press
to begin testing. There are three tests to choose from: system
test (
SYSTEM TEST
), squirrel cage protection test (
SC PROT TEST
), and synchronization and power factor test
(
SYNC AND PF TEST
). When entering test mode, the SPM responds by opening (de-energizing) the TRIP
relay contacts. When exiting test mode, the SPM responds by closing (energizing) the TRIP relay contacts.
•
SYSTEM TEST
: The SPM performs a complete system test on internal memory, input-output devices,
timers, and other system functions. The results are displayed as the test progresses. The test
sequence will report any failures. If a failure persists after two or three attempts, the unit should be
replaced. The SPM must be reset if the test fails.
DO NOT DEFEAT THE SPM MOTOR RESTART PROTECTION BY SWITCHING THE
CONTROL POWER ON AND OFF. THIS ACTION RESETS THE STALL TIME
COUNTERS AND DEFEATS MOTOR PROTECTION FROM FREQUENT RESTARTS.
CAUTION
ENTER
CAUTION
Summary of Contents for SPM Series
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Page 125: ...GE Power Management SPM Synchronous Motor Protection Control NOTES...
