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Actually it should be...
1. Upon starting the generator, the load contacts on the contactor (A1-A2, B1-B2) will be OPEN. The indicator light on the control panel should be OFF.
2. Flipping the AC circuit interrupter switch to CLOSE and then allowing it to return to center will CLOSE the load contact on the contactor. The indicator light will TURN ON. (Actually K1 closes the moment you move S5 to the CLOSE position)
3. Flipping the AC circuit interrupted switch back to open will CAUSE the load contacts TO OPEN and the light will TURN OFF.
By default the K1 contactor remains open after starting so that power is not inadvertently supplied to the load terminals unless an operator intentionally toggles S5 to the CLOSE position.
K1 doesn't actually "latch" open. That's just it's default or off state. It can only "latch" closed.
The latching operation is as follows.
With the generator running +24 volts is supplied to K1-1 and S5 pin 5 is grounded.
When S5 is toggled to the CLOSE position it connects S5 pins 1 & 2. This creates a ground path via S5-5, S5-4, S5-1, S5-2 to K-2. This causes the contactor K1 to close. At the same time the K1 contacts (shown just above S5 in the schematic) close. When S5 is releases the K1 contacts keep applying ground to K1-2 via S5-4 & S5-5.
This is what causes the K1 contactor to "latch" closed.
When S5 is toggled to the OPEN position this causes S5-5 and S5-4 to open momentarily breaking the ground signal to the K1 contact and to K1-2. This causes the K1 contactor to open and the K1 contact above S5 to open breaking the "latch" circuit.
If your contactor closed indicator comes on immediately after starting the generator then there is something wrong.
Could be S5 is defective, the K1 contactor is welded closed, a wiring problem, or someone intentionally hotwired the K1 coil circuit.
1. Upon starting the generator, the load contacts on the contactor (A1-A2, B1-B2) will be OPEN. The indicator light on the control panel should be OFF.
2. Flipping the AC circuit interrupter switch to CLOSE and then allowing it to return to center will CLOSE the load contact on the contactor. The indicator light will TURN ON. (Actually K1 closes the moment you move S5 to the CLOSE position)
3. Flipping the AC circuit interrupted switch back to open will CAUSE the load contacts TO OPEN and the light will TURN OFF.
By default the K1 contactor remains open after starting so that power is not inadvertently supplied to the load terminals unless an operator intentionally toggles S5 to the CLOSE position.
K1 doesn't actually "latch" open. That's just it's default or off state. It can only "latch" closed.
The latching operation is as follows.
With the generator running +24 volts is supplied to K1-1 and S5 pin 5 is grounded.
When S5 is toggled to the CLOSE position it connects S5 pins 1 & 2. This creates a ground path via S5-5, S5-4, S5-1, S5-2 to K-2. This causes the contactor K1 to close. At the same time the K1 contacts (shown just above S5 in the schematic) close. When S5 is releases the K1 contacts keep applying ground to K1-2 via S5-4 & S5-5.
This is what causes the K1 contactor to "latch" closed.
When S5 is toggled to the OPEN position this causes S5-5 and S5-4 to open momentarily breaking the ground signal to the K1 contact and to K1-2. This causes the K1 contactor to open and the K1 contact above S5 to open breaking the "latch" circuit.
If your contactor closed indicator comes on immediately after starting the generator then there is something wrong.
Could be S5 is defective, the K1 contactor is welded closed, a wiring problem, or someone intentionally hotwired the K1 coil circuit.
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