Beckwith M-2293B adapter panel replacement GE regulator guide

Safety warning: Never disconnect the current circuit when the voltage regulator or transformer is energized. Before dismantling the auxiliary CT, it is necessary to short-circuit the current input, otherwise it may generate fatal high voltage.

3.2 Neutral point indicator light configuration

The neutral point indicator circuit of GE voltage regulator requires TB1-11 to be grounded (light on) when the regulator is in neutral position. M-2293B selects the working mode through the S1 toggle switch in the upper right corner of the printed circuit board:

Up "(Neutral) position: When TB1-11 is grounded, the neutral light is on (compatible with GE conventional wiring).

Down "(Hot) position: The light is on when TB1-11 is connected to a high level.

During installation, the correct location should be selected based on the actual wiring on site.

3.3 Non sequential operation input (not applicable to BASE-R version)

Note: The voltage applied to the non sequential input terminals must be+12Vdc, taken from TB2-28.

The non sequential operation input (TB1-1) receives a+12Vdc "wet" voltage through external dry contacts. When the contact is closed, the output of the controller is disabled and the timer is reset; After the contact is disconnected, the timer restarts counting. This function can be used to coordinate the action timing of multiple voltage regulators.

3.4 Automatic input prohibition

Removing jumper # 15 from the printed circuit board (as shown in Figures 4 and 5) can disable the automatic operation of M-2293B. To control this function through SCADA, a contact with a rated current of ≥ 6A can be connected between the corresponding terminals.

Automatic prohibition can also be achieved by closing the contacts between TB1-1 and TB2-28.

3.5 Operation counter input

Attention: It is strictly prohibited to apply any voltage to this terminal.

The operation count is triggered by the instantaneous grounding of TB1-13 through an external dry touch point. The counter is level sensitive, and before installation, it should be ensured that there is no "wet" voltage on the counter contacts.

3.6 Local/Remote Input

Removing jumper # 14 will prohibit the operation of M-2001 (including automatic voltage boost output and manual RAISE/OFF/OWER switch on the panel). But this operation will not disable the motor voltage input provided by SCADA.

3.7 Multi level voltage reduction

Voltage reduction is achieved through the combination of TB1-2 and TB1-7:

Step 1: Connect TB2-28 (+12V) to TB1-7

Step 2: Connect TB2-28 to TB1-2

Step 3: Connect TB2-28 to both TB1-7 and TB1-2 simultaneously

The percentage of voltage reduction for each step is independently set in the M-2001 software (0-10%, step size 0.1%).

3.8 Disable AUTO/OFF/MANUAL switch status detection (early firmware)

For M-2001 firmware versions prior to D-0067V07.08.15, if the switch status detection function needs to be disabled, it is necessary to:

Disconnect all power sources from M-2293B.

Remove the wire from the S3-4 terminal on the back of the AUTO/OFF/MANUAL switch.

Connect the wire to the S2-4 terminal on the back of the RAISE/OFF/OWER switch.

Disable this feature in the M-2001 configuration accordingly.

Testing and Verification

4.1 Bench testing

Before or after installation, functional verification can be performed according to the following steps (assuming that M-2001 is connected to M-2293B):

Initial setup:

Belt center: 120.0V

Bandwidth: 2.0V

LDC resistance/reactance: 0.0V

Delay: 5 seconds

Basic operation test:

Apply a 120Vac power supply, and the M-2001 displays the local voltage.

When the voltage rises to 121.2V, the LOWER LED should light up.

When the voltage drops to 118.8V, the RAISE LED should light up.

After the voltage is restored to 120V, the LED should turn off.

The voltage rises to 122V (timing starts when it crosses 121V), and after about 5 seconds, the voltage drop output should act.

Line voltage drop compensation (LDC) test:

Resistance compensation: Apply a 100mA in-phase current, set R=24V, RAISE LED should light up; Raise the voltage to 132V and turn off the LED; Assuming R=-24V, the LOWER LED lights up; Reduce the voltage to 108V and turn off the LED.

Reactive compensation: Apply a 100mA 90 ° lead current, set X=24V, and the LOWER LED will light up; Reduce the voltage to 108V and turn off the LED; Assuming X=-24V, RAISE LED lights up; Raise the voltage to 132V and turn off the LED.

Parallel function test (not applicable to BASE-R): Apply a 100mA 90 ° advanced circulating current to TB1-4/TB1-3, and the LOWER LED should light up; Reduce the voltage to 108V and turn off the LED.

Tap position and counter test: Verify the counter increment through the switch between TB1-13 and TB1-8; TB1-11 and TB1-8 should be short circuited to turn on the neutral light and reset the tap position to zero.

Voltage limit and rollback test: Set Block Raise=126V and Block Lower=114V. When the voltage rises to 126.5V, it displays "BR"; when it rises to 128.5V, it displays "FL"; and when it drops to 113.5V, it displays "BL".

4.2 Pre operation inspection

Power supply inspection: Confirm that the wiring of TB1-9 (motor power supply) and TB1-10 (control voltage) is correct, and that the fuse specifications are correct.