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Q

CW6 Series Intelligent Universal Circuit Breakers

A
Serial number Technical issues Possible causes Inspection and troubleshooting methods
1 Circuit breaker tripped (reset button popped up, fault indicator light on) ● Overload long-delay fault decoupling (intelligent controller indicates an overload long-delay fault) 1. Checking the breaking current value and action time on the intelligent controller;
2. analysis of loads and grid operation;
3. if an overload trip is confirmed the cause of the overload should be sought immediately and the overload fault removed;
4. If the actual operating current does not match the long delayed action current, please modify the long delayed action current setting value Ir1 according to the actual operating current.
5. Press the reset button to close the circuit breaker again.
Short circuit fault decoupling (short delay or instantaneous fault indicated by intelligent controller) 1. Checking the breaking current value and action time on the intelligent controller;
2. If a short-circuit fault is confirmed, the cause of the fault should be found immediately and the short-circuit fault removed;
3. check the Ir2 and Ir3 adjustment values of the intelligent controller;
4. check that the circuit breaker is intact and confirm that it can be closed for operation;
5. Press the reset button to reclose the circuit breaker.
Ground fault decoupling (indicated as ground fault by intelligent controller) 1. Checking the breaking current value and action time on the intelligent controller;
2. if the presence of an earth fault is confirmed the cause of the fault should be sought and removed immediately;
3. if no earth fault is confirmed, check that the earth fault current setting is appropriate and matches the actual protection, if the setting current is not appropriate, the earth fault current setting should be modified;
4. Press the reset button to close the circuit breaker again.
● Undervoltage detriggers 1. Check that the supply voltage is below 70% Ue.
2. Check that the undervoltage detriggers are not faulty.
●Diverter decoupling operation Check that no incorrect commands are issued in the control loop.
2 Breaker will not close ● Undervoltage detriggers are not activated 1. whether the undervoltage detriggers are energised;
2. Check that the supply voltage is below 85% Ue.
3. Check if the undervoltage detonator is faulty, if confirmed replace the undervoltage detonator.
Reset button is not reset in the pop-up state Press the reset button to close the circuit breaker again.
Drawer type circuit breaker not swung into place Swing the drawer breaker into position and lock it in the "connected" or "test" position.
● Poor contact in the secondary circuit of the drawer type circuit breaker Check secondary circuit contact and troubleshoot.
● Circuit breaker without energy storage 1. Check that the power supply for the control of the electric operating mechanism is on and that the voltage is ≥85% Us.
2. Check for faults in the electric operating mechanism
Mechanical interlocking action, disconnection device is "locked" Check that the mechanical interlocking of the circuit breaker is working properly
Closing derailleur problems 1. Check the closing striker control power supply voltage shall be ≥85% Us.
2. If the closing striker has jang then replace the closing striker.
3 Breaker trips after closing Immediate tripping delayed tripping 1. there may be a short-circuit current in the circuit at the time of closing, the cause of the fault should be sought and eliminated;

2. the circuit has no overload current, the cause of the fault should be found and eliminated;

3. the circuit breaker mechanism should be checked for completeness;
4. check whether the intelligent controller calibration value is reasonable, if not reasonable should adjust the calibration value;
5. Press the reset button to close the circuit breaker again.

4

Breaker will not break ● The circuit breaker cannot be operated electrically; ● The circuit breaker cannot be manually operated by the breaker button 1. check that the shunt striker circuit is reliably connected;
2. check for faults in the sub-excitation derailleur and replace it if it is confirmed to be faulty;
3. check the circuit breaker mechanism for mechanical faults;
4. The control power supply voltage of the shunt excitation decoupler should be ≥ 70% Us.
5 Breaker cannot store energy ● No manual energy storage no electric energy storage 1. Check the electric operating mechanism control power supply voltage should be ≥85% Us.
2. check the electric operating mechanism control power connection for faults;
3. check the motor of the electric operating mechanism for faults;
4. Check the mechanical transmission structure of the electric operating mechanism for faults.
5. Check the operating handle, ratchet, pawl and stop.
6 Drawer-type circuit breakers cannot be withdrawn in the "detached" position Failure to hold down the latch breaker does not fully reach the "disengaged" position Press the latch; swing the breaker fully into the "disengaged" position.
7 Drawer-type circuit breakers cannot be swung to the "connected" position ● Foreign objects fall into the drawer seat and jam the rocking mechanism The gear of the rocking mechanism is damaged Check that no foreign objects have fallen inside the drawer seat, and if so, clean it up promptly; check that the gears or racks inside the drawer seat are intact.
8 No display on smart controller screen ● The intelligent controller is not connected to the auxiliary power supply; ● The input voltage of the auxiliary power supply of the intelligent controller is not normal; ● The auxiliary power connection circuit of the intelligent controller inside the circuit breaker is not reliably connected; Check that the intelligent controller auxiliary power supply is well connected; check that the intelligent controller auxiliary power supply voltage is normal.
9 Irregular communication ● unreliable connection between the communication line and the circuit breaker terminals The sequence of the A and B ends of the communication line is reversed; ● there is a problem with the setting of the circuit breaker communication address; ● the communication parameters are not matched; 1. Check whether the communication line is reliably connected to the circuit breaker terminals or whether it is misconnected.
2. check whether the communication lines A and B are connected backwards and correct them if they are;
3. check that the communication distances and connections are as required;
4. Check that the circuit breaker communication address and other parameters are set correctly and without conflicts.

 

Q

CW3 Series Intelligent Universal Circuit Breakers

A
Serial number Technical issues Possible causes Inspection and troubleshooting
1 Circuit breaker tripped (fault indicator light on) Overload fault decoupling (long delay indicator on)

1. checking the interruption current values and action times on the intelligent controller;

2. analyse the load and grid operation;

3. if overload is confirmed, find and remove the fault immediately

4. if the actual operating current does not match the long-delay action current, modify the long-delay action current rectification value according to the actual operating current to properly match the protection;

5. press the reset button to close the circuit breaker again.

Short circuit fault decoupling (short delay or momentary indicator light)

1. check the interrupting current value and action time on the intelligent controller;

2. finding and removing the fault immediately if a short circuit is confirmed

3. check the rectification value of the intelligent controller

4. check that the circuit breaker is intact and determine whether it can be closed for operation

5. press the reset button to close the circuit breaker again.

Ground fault decoupling (ground fault indicator on)

1. check the interrupting current value and action time on the intelligent controller;

2. if a short circuit is confirmed find and remove the fault immediately

3. if no earth fault is checked, check that the earth fault current setting is appropriate and matches the actual protection; if the setting is not appropriate, modify the earth fault current setting;

4. press the reset button and close the circuit breaker again.

Undervoltage detriggers detriggered

1. check that the supply voltage is not below 70% Us.

2. check that the undervoltage detriggers and control units are not faulty;

Mechanical interlocking action Check the working condition of the two circuit breakers equipped with mechanical interlocking.
2 Breaker will not close Undervoltage detriggers not engaged

1. whether the undervoltage striker is energized;

2. check that the supply voltage is below 85% Us.

3. check if the undervoltage detriggers and control unit are faulty, if confirmed the undervoltage detriggers should be replaced.

Reset button not reset Press the reset button to close the circuit breaker again.
Drawer type circuit breaker not swung into place Swing the drawer breaker into place (locked in the "connected" or "test" position).
Poor contact in the secondary circuit of the drawer type circuit breaker Check secondary circuit contact and troubleshoot.
Breaker not pre-storing energy

1. Check that the motor control power is on and must be ≥85% Us.

2. Check that the motor energy storage mechanism is not faulty.

Mechanical interlock action, circuit breaker blocked Check whether the mechanical interlocking of each circuit breaker is in normal working condition
Gate closing solenoid problems

1. check the closing solenoid supply voltage must be ≥ 85% Us.

2. If there is a problem with the closing solenoid, it should be replaced if it cannot be absorbed.

3 Breaker trips after closing 立Immediate tripping Delayed tripping

1. There may be a short-circuit current in the circuit at the time of closing, the fault should be searched for and eliminated.

2. There is no overload current in the circuit, and the fault should be found and eliminated.

3. Check whether the circuit breaker mechanism is in good condition.

4. Check whether the intelligent controller setting value is reasonable, unreasonable to re-set.

5. Press the reset button to close the circuit breaker again.

4 Breaker will not break l Cannot break the circuit breaker from a distance l Cannot break the circuit breaker by the break button

1. check that the shunt circuit is connected reliably and that the shunt is not faulty, and replace the shunt if it is confirmed to be faulty;

2. check the operating mechanism for mechanical faults.

3. check if the voltage of the shunt release is below 85%.

5 Breaker cannot store energy l No manual energy storage l No electric energy storage

1. check that the control supply voltage of the electric energy storage device should be ≥85%Us and that there are no problems with the circuit connections;

2. check the electric motor for problems; 3. the energy storage mechanism is faulty.

6 Drawer-type circuit breakers cannot be withdrawn in the "detached" position l Latch not held down l Rocker not pulled out l Circuit breaker not fully in "disengaged" position Press down on the latch. Pull out the rocker. Crank the breaker fully into the "disengaged" position.
7 Drawer-type circuit breakers cannot be swung to the "connected" position Foreign objects have fallen into the drawer seat and jammed the rocking mechanism or the gears of the rocking mechanism have been damaged Check for foreign objects and the condition of the rack and pinion
8 智No display on the energy controller screen

lThe intelligent controller is not powered on

lThe voltage at the input of the auxiliary power supply is not normal

lBase transformer secondary output voltage is not normal

lThe link between the secondary output of the base transformer and the controller is not reliable

1. check that the intelligent controller is well powered on;

2. Remove power from the intelligent controller control, then turn on the power again, if the fault still exists, the controller may have a problem and needs to be replaced.

9 Irregular communication

l Communication line and circuit breaker terminals are not reliably connected

l Communication line A and B end sequence is reversed l Communication distance and connection method have problems that do not meet the requirements

l Problems in setting the communication address of the circuit breaker

lCommunication parameters are not set to match

1. check whether the communication line is reliably connected to the circuit breaker terminals or whether it is misconnected;

2. to check whether the sequence of the A and B ends of the communication line is connected in reverse, if the connection is corrected;

3. check that the communication distance and wiring method meet the requirements;

4. check that the communication address of the circuit breaker is set correctly and without conflict.

10 Smart controller displays "ERR9" Excessive temperature around the controller Lower ambient temperature

 

Q

CW3V Series Intelligent Vacuum Universal Circuit Breakers

A
Serial number Technical issues Possible causes Inspection and troubleshooting
1 Circuit breaker tripped (fault indicator light on) Overload fault decoupling (long delay indicator on)

1. checking the interruption current values and action times on the intelligent controller;

2. analyse the load and grid operation;

3. if overload is confirmed, find and remove the fault immediately

4. if the actual operating current does not match the long-delay action current, modify the long-delay action current rectification value according to the actual operating current to properly match the protection;

5. press the reset button to close the circuit breaker again.

Short circuit fault decoupling (short delay or momentary indicator light)

1. check the interrupting current value and action time on the intelligent controller;

2. finding and removing the fault immediately if a short circuit is confirmed

3. check the rectification value of the intelligent controller

4. check that the circuit breaker is intact and determine whether it can be closed for operation

5. press the reset button to close the circuit breaker again.

Ground fault decoupling (ground fault indicator on)

1. check the interrupting current value and action time on the intelligent controller;

2. if a short circuit is confirmed find and remove the fault immediately

3. if no earth fault is checked, check that the earth fault current setting is appropriate and matches the actual protection; if the setting is not appropriate, modify the earth fault current setting;

4. press the reset button and close the circuit breaker again.

Undervoltage detriggers detriggered

1. check that the supply voltage is not below 70% Us.

2. check that the undervoltage detriggers and control units are not faulty;

Mechanical interlocking action Check the working condition of the two circuit breakers equipped with mechanical interlocking.
2 Breaker will not close Undervoltage detriggers not engaged

1. whether the undervoltage striker is energized;

2. check that the supply voltage is below 85% Us.

3. check if the undervoltage detriggers and control unit are faulty, if confirmed the undervoltage detriggers should be replaced.

Reset button not reset Press the reset button to close the circuit breaker again.
Drawer type circuit breaker not swung into place Swing the drawer breaker into place (locked in the "Connect" or "Test" position).
Poor contact in the secondary circuit of the drawer type circuit breaker Check secondary circuit contact and troubleshoot.
Breaker not pre-storing energy

1. Check that the motor control power is on and must be ≥85% Us.

2. Check that the motor energy storage mechanism is not faulty.

Mechanical interlock action, circuit breaker blocked Check whether the mechanical interlocking of each circuit breaker is in normal working condition
Gate closing solenoid problems

1. check the closing solenoid supply voltage must be ≥ 85% Us.

2. If there is a problem with the closing solenoid, it should be replaced if it cannot be absorbed.

3 Breaker trips after closing Immediate tripping Delayed tripping

1. There may be a short-circuit current in the circuit at the time of closing, the fault should be searched for and eliminated.

2. There is no overload current in the circuit, and the fault should be found and eliminated.

3. Check whether the circuit breaker mechanism is in good condition.

4. Check whether the intelligent controller setting value is reasonable, unreasonable to re-adjust; 5. Press the reset button to close the circuit breaker again.

4 Breaker will not break

l Cannot be made to break the circuit breaker from a distance

lNo breaking of the circuit breaker by the breaking button

1. check that the shunt circuit is connected reliably and that the shunt is not faulty, and replace the shunt if it is confirmed to be faulty;

2. check the operating mechanism for mechanical faults.

3. check if the voltage of the shunt release is below 85%.

5 Breaker cannot store energy

lNo manual energy storage

lNo electric energy storage

1. check that the control supply voltage of the electric energy storage device should be ≥ 85% Us and that there are no problems with the circuit connections;

2. check that there are no problems with the motor;

3. the energy storage mechanism is faulty.

6 Drawer-type circuit breakers cannot be withdrawn in the "detached" position

lLocker not held down

Lever not pulled out

lCircuit breaker not fully in the "disengaged" position

Press down on the latch. Pull out the rocker. Crank the breaker fully into the "disengaged" position.
7 Drawer-type circuit breakers cannot be swung to the "connected" position Foreign objects have fallen into the drawer seat and jammed the rocking mechanism or the gears of the rocking mechanism have been damaged Check for foreign objects and the condition of the rack and pinion
8 No display on smart controller screen

lThe intelligent controller is not powered on

lThe voltage at the input of the auxiliary power supply is not normal

lBase transformer secondary output voltage is not normal

lThe link between the secondary output of the base transformer and the controller is not reliable

1. check that the intelligent controller is well powered on;

2. Remove power from the intelligent controller control, then turn on the power again, if the fault still exists, the controller may have a problem and needs to be replaced.

9 Irregular communication

lCommunication line and circuit breaker terminals are not reliably connected

lThe order of the A and B ends of the communication line is reversed

l Communication distance and connection method are not in accordance with the requirements

l Problems in setting the communication address of the circuit breaker

lCommunication parameters are not set to match

1. check whether the communication line is reliably connected to the circuit breaker terminals or whether it is misconnected;

2. to check whether the sequence of the A and B ends of the communication line is connected in reverse, if the connection is corrected;

3. check that the communication distance and wiring method meet the requirements;

4. check that the communication address of the circuit breaker is set correctly and without conflict.

10 Smart controller displays "ERR9" Excessive temperature around the controller Lower ambient temperature

 

Q

CW3R Series Intelligent Vacuum Universal Circuit Breakers

A
Serial number Technical issues Possible causes Inspection and troubleshooting
1 Circuit breaker tripped (fault indicator light on) Overload fault decoupling (long delay indicator on)

1. checking the interrupting current values and action times on the intelligent controller;

2. analyse the load and grid operation;

3. if overload is confirmed, find and remove the fault immediately

4. if the actual operating current does not match the long-delay action current, modify the long-delay action current rectification value according to the actual operating current to properly match the protection;

5. press the reset button to close the circuit breaker again.

Short circuit fault decoupling (short delay or momentary indicator light)

1. check the interrupting current value and action time on the intelligent controller;

2. finding and removing the fault immediately if a short circuit is confirmed

3. check the rectification value of the intelligent controller

4. check that the circuit breaker is intact and determine whether it can be closed for operation

5. press the reset button to close the circuit breaker again.

Earth fault decoupling (earth fault indicator on)

1. check the interrupting current value and action time on the intelligent controller;

2. if a short circuit is confirmed find and remove the fault immediately

3. if no earth fault is checked, check that the earth fault current setting is appropriate and matches the actual protection; if the setting is not appropriate, modify the earth fault current setting;

4. press the reset button and close the circuit breaker again.

Undervoltage detriggers detriggered

1. check that the supply voltage is not below 70% Us.

2. check that the undervoltage detriggers and control units are not faulty;

Mechanical interlocking action Check the working condition of the two circuit breakers equipped with mechanical interlocking.
2 Breaker will not close Undervoltage detriggers not engaged

1. whether the undervoltage striker is energized;

2. check that the supply voltage is below 85% Us.

3. check if the undervoltage detriggers and control unit are faulty, if confirmed the undervoltage detriggers should be replaced.

Reset button not reset Press the reset button to close the circuit breaker again.
Drawer type circuit breaker not swung into place Swing the drawer breaker into place (locked in the "Connect" or "Test" position).
Poor contact in the secondary circuit of the drawer type circuit breaker Check secondary circuit contact and troubleshoot.
Breaker not pre-storing energy

1. Check that the motor control power is on and must be ≥85% Us.

2. Check that the motor energy storage mechanism is not faulty.

Mechanical interlock action, circuit breaker blocked Check whether the mechanical interlocking of each circuit breaker is in normal working condition
Gate closing solenoid problems

1. check the closing solenoid supply voltage must be ≥ 85% Us.

2. If there is a problem with the closing solenoid, it should be replaced if it cannot be absorbed.

3 Breaker trips after closing

Immediate tripping

Delayed tripping

1. There may be a short-circuit current in the circuit at the time of closing, the fault should be searched for and eliminated.

2. There is no overload current in the circuit, and the fault should be found and eliminated.

3. Check whether the circuit breaker mechanism is in good condition.

4. Check whether the intelligent controller setting value is reasonable, unreasonable to re-setting.

5. Press the reset button to close the circuit breaker again.

4 Breaker will not break

l Cannot be made to break the circuit breaker from a distance

lNo breaking of the circuit breaker by the breaking button

1. check that the shunt circuit is connected reliably and that the shunt is not faulty, and replace the shunt if it is confirmed to be faulty;

2. check the operating mechanism for mechanical faults.

3. check if the voltage of the shunt release is below 85%.

5 Breaker cannot store energy

lNo manual energy storage

lNo electric energy storage

1. check that the control supply voltage of the electric energy storage device should be ≥ 85% Us and that there are no problems with the circuit connections;

2. check that there are no problems with the motor;

3. the energy storage mechanism is faulty.

6 Drawer-type circuit breakers cannot be withdrawn in the "detached" position

Latch not held down lLocker not pulled out

lCircuit breaker not fully in "disengaged" position

Press down on the latch. Pull out the rocker. Crank the breaker fully into the "disengaged" position.
7 Drawer-type circuit breakers cannot be swung to the "connected" position Foreign objects have fallen into the drawer seat and jammed the rocking mechanism or the gears of the rocking mechanism have been damaged Check for foreign objects and the condition of the rack and pinion
8 智No display on the energy controller screen

lThe intelligent controller is not powered on

lThe voltage at the input of the auxiliary power supply is not normal

lBase transformer secondary output voltage is not normal

lThe link between the secondary output of the base transformer and the controller is not reliable

1. check that the intelligent controller is well powered on;

2. Remove power from the intelligent controller control, then turn on the power again, if the fault still exists, the controller may have a problem and needs to be replaced.

9 Irregular communication

lCommunication line and circuit breaker terminals are not reliably connected

lThe order of the A and B ends of the communication line is reversed

l Communication distance and connection method are not in accordance with the requirements

l Problems in setting the communication address of the circuit breaker

lCommunication parameters are not set to match

1. check whether the communication line is reliably connected to the circuit breaker terminals or whether it is misconnected;

2. to check whether the sequence of the A and B ends of the communication line is connected in reverse, if the connection is corrected;

3. check that the communication distance and wiring method meet the requirements;

4. check that the communication address of the circuit breaker is set correctly and without conflict.

10 Smart controller displays "ERR9" Excessive temperature around the controller Lower ambient temperature

 

Q

CW2 Series Intelligent Universal Circuit Breakers

A
Serial number Technical issues Possible causes Inspection and troubleshooting
1 Circuit breaker tripped (fault indicator light on) 过Load fault decoupling (long delay indicator on)

1. checking the interrupting current values and action times on the intelligent controller;

2. analyse the load and grid operation;

3. if overload is confirmed, find and remove the fault immediately

4. if the actual operating current does not match the long-delay action current, modify the long-delay action current rectification value according to the actual operating current to properly match the protection;

5. press the reset button to close the circuit breaker again.

Short circuit fault decoupling (short delay or momentary indicator light)

1. check the interrupting current value and action time on the intelligent controller;

2. finding and removing the fault immediately if a short circuit is confirmed

3. check the rectification value of the intelligent controller

4. check that the circuit breaker is intact and determine whether it can be closed for operation

5. press the reset button to close the circuit breaker again.

接Earth fault decoupling (earth fault indicator on)

1. check the interrupting current value and action time on the intelligent controller;

2. if a short circuit is confirmed find and remove the fault immediately

3. if no earth fault is checked, check that the earth fault current setting is appropriate and matches the actual protection; if the setting is not appropriate, modify the earth fault current setting;

4. press the reset button and close the circuit breaker again.

Undervoltage detriggers detriggered

1. check that the supply voltage is not below 70% Us.

2. check that the undervoltage detriggers and control units are not faulty;

Mechanical interlocking action Check the working condition of the two circuit breakers equipped with mechanical interlocking.
2 Breaker will not close Undervoltage detriggers not engaged

1. whether the undervoltage striker is energized;

2. check that the supply voltage is below 85% Us.

3. check if the undervoltage detriggers and control unit are faulty, if confirmed the undervoltage detriggers should be replaced.

Reset button not reset Press the reset button to close the circuit breaker again.
Drawer type circuit breaker not swung into place Swing the drawer breaker into place (locked in the "Connect" or "Test" position).
Poor contact in the secondary circuit of the drawer type circuit breaker Check secondary circuit contact and troubleshoot.
Breaker not pre-storing energy

1. Check that the motor control power is on and must be ≥85% Us.

2. Check that the motor energy storage mechanism is not faulty.

Mechanical interlock action, circuit breaker blocked Check whether the mechanical interlocking of each circuit breaker is in normal working condition
Gate closing solenoid problems

1. check the closing solenoid supply voltage must be ≥ 85% Us.

2. If there is a problem with the closing solenoid, it should be replaced if it cannot be absorbed.

3 Breaker trips after closing Immediate tripping Delayed tripping

1. There may be a short-circuit current in the circuit at the time of closing, the fault should be searched for and eliminated.

2. There is no overload current in the circuit, and the fault should be found and eliminated.

3. Check whether the circuit breaker mechanism is in good condition.

4. Check whether the intelligent controller setting value is reasonable, unreasonable to re-setting.

5. Press the reset button to close the circuit breaker again.

4 Breaker will not break lCannot break the circuit breaker from a distance l Cannot break the circuit breaker by the break button

1. check that the shunt circuit is connected reliably and that the shunt is not faulty, and replace the shunt if it is confirmed to be faulty;

2. check the operating mechanism for mechanical faults.

3. check if the voltage of the shunt release is below 85%.

5 Breaker cannot store energy l No manual energy storage l No electric energy storage

1. check that the control supply voltage of the electric energy storage device should be ≥ 85% Us and that there are no problems with the circuit connections;

2. check that there are no problems with the motor;

3. the energy storage mechanism is faulty.

6 Drawer-type circuit breakers cannot be withdrawn in the "detached" position

 

Latch not held down lLocker not pulled out

 lCircuit breaker not fully in "disengaged" position

Press down on the latch. Pull out the rocker. Crank the breaker fully into the "disengaged" position.
7 Drawer-type circuit breakers cannot be swung to the "connected" position Foreign objects have fallen into the drawer seat and jammed the rocking mechanism or the gears of the rocking mechanism have been damaged Check for foreign objects and the condition of the rack and pinion
8 No display on smart controller screen

lThe intelligent controller is not powered on

lThe voltage at the input of the auxiliary power supply is not normal

lBase transformer secondary output voltage is not normal

lThe link between the secondary output of the base transformer and the controller is not reliable

1. check that the intelligent controller is well powered on;

2. Remove power from the intelligent controller control, then turn on the power again, if the fault still exists, the controller may have a problem and needs to be replaced.

9 Controller communication not normal for H26, HY26, P25, P26

lCommunication line and circuit breaker terminals are not reliably connected

lThe order of the A and B ends of the communication line is reversed

l Communication distance and connection method are not in accordance with the requirements

l Problems in setting the communication address of the circuit breaker l Mismatch in setting the communication parameters

1. check whether the communication line is reliably connected to the circuit breaker terminals or whether it is misconnected;

2. to check whether the sequence of the A and B ends of the communication line is connected in reverse, if the connection is corrected;

3. check that the communication distance and wiring method meet the requirements;

4. check that the communication address of the circuit breaker is set correctly and without conflict.

10 Smart controller displays "ERR9" Excessive temperature around the controller Lower ambient temperature

 

Q

CW1 Series Intelligent Universal Circuit Breakers

A
Serial number Technical issues Possible causes Inspection and troubleshooting
1 Circuit breaker tripped (fault indicator light on) 过Load fault decoupling (long delay indicator on)

1. checking the interrupting current values and action times on the intelligent controller;

2. analyse the load and grid operation;

3. if overload is confirmed, find and remove the fault immediately

4. if the actual operating current does not match the long-delay action current, modify the long-delay action current rectification value according to the actual operating current to properly match the protection;

5. press the reset button to close the circuit breaker again.

Short circuit fault decoupling (short delay or momentary indicator light)

1. check the interrupting current value and action time on the intelligent controller;

2. finding and removing the fault immediately if a short circuit is confirmed

3. check the rectification value of the intelligent controller

4. check that the circuit breaker is intact and determine whether it can be closed for operation

5. press the reset button to close the circuit breaker again.

Earth fault decoupling (earth fault indicator on)

1. check the interrupting current value and action time on the intelligent controller;

2. if a short circuit is confirmed find and remove the fault immediately

3. if no earth fault is checked, check that the earth fault current setting is appropriate and matches the actual protection; if the setting is not appropriate, modify the earth fault current setting;

4. press the reset button and close the circuit breaker again.

Undervoltage detriggers detriggered

1. check that the supply voltage is not below 70% Us.

2. check that the undervoltage detriggers and control units are not faulty;

Mechanical interlocking action Check the working condition of the two circuit breakers equipped with mechanical interlocking.
2 Breaker will not close Undervoltage detriggers not engaged

1. whether the undervoltage detriggers are energized;

2. check that the supply voltage is below 70% Us.

3. Check if the undervoltage detriggers and control unit are faulty, and replace the undervoltage detriggers if the fault is confirmed.

Reset button not reset Press the reset button to close the circuit breaker again.
Drawer type circuit breaker not swung into place 将Drawer-type circuit breaker swung into place (should "click" twice)
Poor contact in the secondary circuit of the drawer type circuit breaker Check the secondary circuit contact and remove it.
Breaker not pre-storing energy

1. Check that the motor control power is on and must be ≥85% Us.

2. Check that the motor energy storage mechanism is not faulty.

Mechanical interlock action, circuit breaker blocked Check whether the mechanical interlocking of each circuit breaker is in normal working condition
Gate closing solenoid problems

1. check the closing solenoid supply voltage must be ≥ 85% Us.

2. If there is a problem with the closing solenoid, it should be replaced if it cannot be absorbed.

3 Breaker trips after closing

Immediate tripping

Delayed tripping

1. the possibility that there is a short-circuit current in the circuit at the time of closing, which should be sought and eliminated;

2. there is an overload current in the circuit; faults should be sought and eliminated

3. the circuit breaker mechanism should be checked to see if it is in good condition;

4. check whether the intelligent controller rectification value is reasonable, unreasonable to re-qualify;

5. press the reset button to close the circuit breaker again

4 Breaker will not break

 

l Cannot be made to break the circuit breaker from a distance

 lNo breaking of the circuit breaker by the breaking button

1. check that the shunt circuit is connected reliably and that the shunt is not faulty, and replace the shunt if it is confirmed to be faulty;

2. check the operating mechanism for mechanical faults.

5 Breaker cannot store energy  l No manual energy storage 2 No electric energy storage

1. check that the control supply voltage of the electric energy storage device should be ≥ 85% Us and that there are no problems with the circuit connections;

2. check that there are no problems with the motor;

3. the energy storage mechanism is faulty.

6 Drawer-type circuit breakers cannot be withdrawn in the "detached" position l Handle not pulled out l Circuit breaker not fully in "disengaged" position Pull out the handle. Swing the circuit breaker fully into the "disengaged" position.
7 Drawer-type circuit breakers cannot be swung to the "connected" position Foreign objects have fallen into the drawer seat and jammed the rocking mechanism or the gears of the rocking mechanism have been damaged Check for foreign objects and the condition of the rack and pinion
8 No display on smart controller screen

 

lThe intelligent controller is not powered on

 lThe voltage at the input of the auxiliary power supply is not normal

 lBase transformer secondary output voltage is not normal

 lThe link between the secondary output of the base transformer and the controller is not reliable

1. check that the intelligent controller is well powered on;

2. Remove power from the intelligent controller control, then turn on the power again, if the fault still exists, the controller may have a problem and needs to be replaced.

9 H, HY type controller communication is not normal

lCommunication line and circuit breaker terminals are not reliably connected

 lThe order of the A and B ends of the communication line is reversed

 l Communication distance and connection method are not in accordance with the requirements

 lThe circuit breaker communication address setting has problems

1. check whether the communication line is reliably connected to the circuit breaker terminals or whether it is misconnected;

2. to check whether the sequence of the A and B ends of the communication line is connected in reverse, if the connection is corrected;

3. check that the communication distance and wiring method meet the requirements;

4. check that the communication address of the circuit breaker is set correctly and without conflict.

10 Smart controller displays "ERR9" Excessive temperature around the controller Lower ambient temperature

 

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