GE Industrial Solutions BreakMaster Load Interrupter Switch - Manual (Page 20)

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BreakMaster Load Interrupter Switch
Sequence of Operation
(For Exact Wiring and Operation Refer to Drawings Furnished with Equipment) (Typical)
Apply the proper control voltage to terminals M1 and M2.
To Close the Switch:
1. a. Return manual handle to the cradle.
b. Turn cradle keylock to capture the key and close its auxiliary contact.
c. Make sure any remote lockout devices in series with the cradle lock switch are closed. Terminals M3-M4 are
for this key interlock system.
2. Relay 5 is energized to close the 3-5 contacts and energize the control power bus.
3. Complete the circuits of M5 and M6 with a momentary closing contact
4. 89X circuit is energized through the normally closed 89/CL contact 3-4.
5. The 89X contacts 13-14 seal around the remote-close contacts. (Note: 89X-89Y relays are mechanically interlocked
to prevent both being closed at the same time).
6. Contacts 1-2 of 89X is closed to energize the clutch solenoid (SOL).
7. Also contact 5-6 and 3-4 of 89X close, placing the positive DC voltage on motor armature terminal A1. The motor
rotates then to close switch 89.
8. The closing of switch 89 reverses its auxiliary switch 89/CL to open and auxiliary switch 89/OP to close, setting
up the opening circuit of 89 upon receipt of an opening signal to terminals M6-M7.
9. The opening of 89/CL drops out 89X thereby breaking the seal in contact 89X-13-14. Also opening the 89X contacts
deenergizes the motor.
To Open the Switch:
1. In the same manner, a remote-open signal placed on terminals M6-M7 will energize 89Y to:
a. Energize clutch solenoid (SOL).
b. Place positive DC on armature terminal A2 to reverse motor direction.
2. Once 89 is closed, 89/OP opens to de-energize SOL, stop motor, and 89/CL closes to set up the next closing
operation. All as described above.
Adjustments
1. Wiring Harness Inspection
Refer to the Wiring Diagram and Schematic shipped with the equipment. Trace out all inter-wiring connections
to ensure conformity with the diagram and understanding of all remote interconnect requirements.
2. Deactivate the Direct Drive Solenoid Coupler Assembly
• Disconnect the coil wiring on the direct drive solenoid. This is done by disconnecting the three (3) black wires
and one (1) grey wire hooked up to Terminal 2 and Terminal I respectively on the coil itself (see Wiring Diagram).
• Isolate the black lead wire from the coil and make sure this wire is isolated and insulated from any power
source. Take the remaining two (2) black wires which, if traced back, go to wiring points A2 and AC2, and verify
they are jumpered together, allowing power to flow to the Dl-D4 bridge. Insulate and isolate the grey wire
connected from Point 1 on the solenoid coil.
3. Checking Motor Rotation
Hook up your remote close and remote open devices. Energize with the required control voltages. Now check
the directional rotation of shaft. The top of the shaft should spin in the same direction as the intended interrupter
switch motion. To test, jumper lockout interlocks provision at the M3-M4 terminal connection. Now activate the
remote close device. The top of the shaft should be spinning toward the interrupter switch. Now activate the
remote open device. The top of the shaft should be spinning toward the front of the cubicle. If this rotation is
not correct reverse the power leads to the motor to reverse polarity and therefore reverse rotation of the shaft.
CAUTION
It is essential that the incoming POSITIVE be connected to the POSITIVE terminal of
of the drive controls and the NEGATIVE be connected to the NEGATIVE of the
drive system. Severe damage will be caused if these polarities are reversed.
!