Operating Accessories

XF, MX, and MN Voltage Releases

XF, MX, and MN voltage releases are optional accessories mounted inside the circuit breaker.

These voltage releases are designed to receive either pulse-type or maintained voltage operating orders.

Reinforced voltage releases sustain overvoltage on coil control at 15% of control nominal voltage. They are used for electrical networks with a high overvoltage level.

For information on installation of reinforced voltage releases, consult instruction sheet NVE40749 on the Schneider Electric website.

For information on installation of standard voltage releases, consult instruction sheet 51156123AA on the Schneider Electric website.

XF Closing Voltage Release

The XF closing voltage release closes the circuit breaker instantaneously when powered if the spring mechanism is charged. The minimum duration of the pulse operating order must be 200 ms.

MX Opening Voltage Release

The MX opening voltage release opens the circuit breaker instantaneously when powered. The minimum duration of the pulse operating order must be 200 ms. The MX opening voltage release locks the circuit breaker in the OFF position if the command is maintained.

MN Undervoltage Release

The MN undervoltage release instantaneously opens the circuit breaker when its supply voltage drops to a value between 35% and 70% of its rated voltage. If there is no supply to the release, it is impossible to close the circuit breaker, either manually or electrically. Any attempt to close the circuit breaker has no effect on the main contacts. Circuit breaker closing is enabled again when the supply voltage of the release returns to 85% of its rated value.

PF Ready-to-close Contact

This is an optional accessory that is mounted inside the circuit breaker.

The PF ready-to-close contact delivers remotely, the indication delivered locally by the ready-to-close indicator.

It consists of a changeover contact indicating remotely that the circuit breaker is ready to close, that is:

• The circuit breaker is in the open position.

• The spring mechanism is charged.

• There is no maintained opening order.

For information on installation, consult instruction sheet NVE35466 on the Schneider Electric website.

MCH Gear Motor

This is an optional accessory that is mounted inside the circuit breaker.

The MCH gear motor automatically charges the spring mechanism when the circuit breaker is closed, allowing instantaneous closing of the circuit breaker following opening.

For information on installation, consult instruction sheet NVE35483 sheet on the Schneider Electric website.

RES Electrical Remote Reset

This is an optional accessory that is mounted inside the circuit breaker.

Following tripping, this function resets the SDE fault-trip indication contact and the mechanical indicator, and enables circuit breaker closing.

The use of an XF closing release is compulsory with this option.

The RES electrical remote reset is not compatible with the SDE2 additional fault-trip indication contact because they are installed in the same physical location.

For information on installation, consult instruction sheet NVE35503 on the Schneider Electric website.

CDM Mechanical Operation Counter

This is an optional accessory that is mounted inside the circuit breaker.

The CDM mechanical operation counter counts the number of operating cycles and is visible on the front panel. It is compatible with manual and electrical control functions.

This option is compulsory for all source-changeover systems.

For information on installation, consult instruction sheet NVE35485 on the Schneider Electric website.