What to do if LEGRAND Circuit breakers racking shutter does not re-close automatically?
If the LEGRAND Circuit breakers racking shutter doesn't re-close automatically after the racking handle is pulled out, it might be because the breaker is in-between the Service/Test/Isolated position. Ensure the position indicator is aligned with one of the distinct positions by racking the breaker in or out.
What to do if LEGRAND Circuit breakers ACB trips after closing?
If your LEGRAND Circuit breaker trips after closing, it could be due to a couple of reasons. If it trips after a few seconds or minutes, there may be an overload fault. Inspect the unit protection to identify the fault and then resolve the cause. Alternatively, the Shunt Release may be continuously receiving a command. In this case, verify the source of the command.
Why LEGRAND DMX3 ACB does not close on pressing “ON” button?
If your LEGRAND Circuit breakers ACB does not close when you press the “ON” button, it could be due to several reasons. First, the U/V release might be present but not energized; in this case, you should energize the U/V release. Second, the mechanism spring might not be charged; charge it manually until the spring status indicator turns yellow. Third, the reset button might be ejected; press the reset button. Finally, the mechanical interlock might be disabling closing; recheck before trying to close the breaker.
Why LEGRAND DMX3 Circuit breakers ACB does not close electrically?
If the LEGRAND Circuit breakers ACB does not close electrically, it means that the “Ready to close” (RTC) conditions are not being met. You should check all RTC conditions to resolve this issue.
How to fix LEGRAND Circuit breakers that can not be driven in Test and Service position?
If the breaker cannot be driven into the Test and Service position, it is possible that the breaker and miss insertion device ratings do not match. Ensure that you put the correct breaker in place.
How to fix LEGRAND DMX3 ACB that does not close on pressing “ON” button?
If the LEGRAND Circuit breakers ACB doesn't close when you press the “ON” button, consider these potential causes: * The selector for dielectric test might be in the “dielectric test position”—set it to the “normal use” position. * The U/V release may be present but not energized—energize the U/V release. * The mechanism spring might not be charged—manually charge it until you hear a distinct sound and the indicator turns yellow. * The reset button could be ejected—press the reset button. * The racking shutter might be open—close the racking shutter. * A mechanical interlock might be disabling closing—re-check before attempting to close the breaker.
What to do if LEGRAND DMX3 ACB does not close electrically?
If the LEGRAND Circuit breakers ACB does not close electrically, it might be because the electrical antipumping is active. To resolve this, interrupt the ‘OPEN’ command once. Another reason could be that the “Ready to close”(RTC) conditions are not met, so you should check all RTC conditions.
Why LEGRAND DMX3 Circuit breakers ACB cannot be pushed in to isolated position?
The LEGRAND Circuit breakers ACB might not push into the isolated position if the breaker and miss insertion device ratings do not match. Ensure you are using the correct breaker.
General| Brand | LEGRAND |
|---|---|
| Model | DMX3 Series |
| Category | Circuit breakers |
| Language | English |
Overview of main electrical and mechanical characteristics.
Physical dimensions for installation and integration.
Weight information for handling and installation planning.
Technical features of the motor operator accessory.
Technical specifications for the closing coil accessory.
Technical specifications for the shunt trip accessory.
Technical specifications for the undervoltage release accessory.
Technical features of the time delay module for UVR.
Technical features of auxiliary signal contacts.
Technical features of additional signaling contacts.
Technical features of the contact ready to close function.
Technical features of inserted/test/draw-out contacts.
Technical features of the programmable output module.
Technical features of the external auxiliary supply.
Mounting details for fixed version breakers.
Required door cut-out dimensions for fixed version.
Mounting details for draw-out version breakers.
Door cut-out and drilling for draw-out version.
Procedure for fixing the door sealing frame.
Termination details for 3-pole DMX3 2500 fixed breakers.
Termination details for 3-pole DMX3 4000 fixed breakers.
Termination details for 3-pole DMX3 6300 fixed breakers.
Termination details for 4-pole DMX3 2500 fixed breakers.
Termination details for 4-pole DMX3 4000 fixed breakers.
Termination details for 4-pole DMX3 6300 fixed breakers.
Termination details for 3-pole DMX3 2500 draw-out.
Termination details for 3-pole DMX3 4000 draw-out.
Termination details for 3-pole DMX3 6300 draw-out.
Termination details for 4-pole DMX3 2500 draw-out.
Termination details for 4-pole DMX3 4000 draw-out.
Termination details for 4-pole DMX3 6300 draw-out.
Connection details for DMX3 2500 fixed version.
Connection details for DMX3 4000 fixed version.
Connection details for DMX3 6300 fixed version.
Details on the Shunt Trip (ST) auxiliary function.
Electrical diagram for 3-pole configurations.
Electrical diagram for 4-pole configurations.
Procedure for inserting or substituting the battery.
How to set protection levels using rotary switches.
Importance of setting date/time for fault archiving.
Procedure to close and seal the protection unit cover.
Explanation of MAN and AUT positions for the reset button.
Technical features of the trip contact.
Procedure for using a padlock on the racking shutter.
Initial checks by the operator for proper installation.
Inspection procedures without applying voltage.
Verifying component specifications match the electrical diagram.
Checks for auxiliary circuits and terminal wiring.
Procedures for dielectric checks and under-voltage tests.
Verifying mechanical functioning and contact operation.
Performing manual opening/closing cycles.
Common causes of faults and recommended checks.
Inspection procedures following a short circuit event.
Conditions and procedures for closing the device.
How faults are indicated and suggested actions.
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