Field Coil Driver Board - Remove and Install
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| Illustration 1 | g00808713 |
(1) "J7 BFC +" (2) "J8 BFC -" (3) "J4 DC -" (4) "J3 DC+" (5) "J6 TFC-" (6) "J5 TFC+" (7) "J2 24 VDC Power In" (8) "J1 APC I/O" | |
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| Illustration 2 | g00985288 |
Field Coil Driver Board | |
Removal Procedure
- Place the system in bypass mode by turning the keyswitch to the Bypass position.
- Isolate the system from the load by closing the bypass circuit breakers.
- Open the circuit breaker for the output of the system.
- Open the AC circuit breaker for the input of the system.
- Allow the capacitor banks to bleed down for approximately 5 minutes.
Note: When the flywheel is spinning, the following components are energized: the bus, the armature leads and the fuses. Accomplish the procedure as quickly as possible. During the procedure, the rotor is spinning on the bottom bearing.
- Label all the input wires and all of the output wires.
- Disconnect the "APC I/O" connector from terminal "J1" (8) .
- Disconnect the "Power" connector from terminal "J2" (7) .
- Disconnect the "DC+" connector from terminal "J3" (4) .
- Disconnect the "DC-" connector from terminal "J4" (3) .
- Disconnect the "TFC+" connector from terminal "J5" (6) .
- Disconnect the "TFC-" connector from terminal "J6" (5) .
- Disconnect the "BFC+" connector from terminal "J7" (1) .
- Disconnect the "BFC-" connector from terminal "J8" (2) .
- Loosen two mounting bolts from the top of the heat sink assembly. Slide the module forward and remove the board.
Installation Procedure
- Install the assembly. Torque the two mounting bolts from the top of the heat sink assembly to 4.5 N·m (40 lb in).
- Connect the "BFC-" connector to terminal "J8" (2) .
- Connect the "BFC+" connector to terminal "J7" (1) .
- Connect the "TFC-" connector to terminal "J6" (5) .
- Connect the "TFC+" connector to terminal "J5" (6) .
- Connect the "DC-" connector to terminal "J4" (3) .
- Connect the "DC+" connector to terminal "J3" (4) .
- Connect the "Power" connector to terminal "J2" (7) .
- Connect the "APC I/O" connector to terminal "J1" (8) .
- Torque all of the terminals to 1.47 N·m (13 lb in).
- Calibrate the hall effect sensors. Proceed to Testing and Adjusting, "Flywheel Telemetry - Calibrate".
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