Plug-in Circuit Breaker

Introduction

Plug-in base circuit breakers make it possible to:

• Extract and/or rapidly replace the circuit breaker without having to touch the connections on the base.

• Allow for the addition of future circuits by installing bases that will be equipped with a circuit breaker at a later date.

• Isolate the power circuits when the circuit breaker is mounted on or through a panel. It acts as a barrier for the connections of the plug-in base. Insulation is made complete by the mandatory short terminal shields on the circuit breaker.

The following types of circuit breaker can be installed in a plug-in base:

• 3P and 4P circuit breakers for general-purpose applications

• Circuit breakers with toggle handle, direct rotary handle, or extended rotary handle

• Motor-operated circuit breakers

The plug-in circuit breaker is made up of the fixed circuit breaker and a plug-in kit, which includes:

• Plug-in base

• Power connections

• Short terminal shields

• Safety trip interlock

For more information about plug-in circuit breaker installation, consult the instruction sheets on the Schneider Electric website:

• GHD16276AA, Plug-in base for ComPacT NSX100-250

• GHD16316AA, Plug-in base for ComPacT NSX400-630

Plug-in Kit and Chassis Installation Demonstration Video

For information about installation of ComPacT NSX DC circuit breakers, consult the ComPacT NSX100–250 circuit breakers installation video. To access the video, click the following link: https://youtu.be/XaXO6QgeWvM, or copy and paste the link to your Web browser.

Disconnecting the Circuit Breaker

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, CSA Z462, NOM-029-STPS, or local equivalent. This equipment must only be installed and serviced by qualified electrical personnel. The circuit breaker must be in the O (OFF) position. Do not use tools to disconnect or connect the circuit breaker. Failure to follow these instructions will result in death or serious injury.

Follow this procedure to disconnect the circuit beaker:

Step	Action
1		Switch the circuit breaker to the O (OFF) position.
2		Remove both mounting screws.
3		Pull out the circuit breaker, keeping it horizontal.

NOTE:

• The auxiliary circuits automatically disconnect because of the connectors located on the base and at the rear of the circuit breaker.

• Open the circuit breaker before disconnecting it. If the circuit breaker is in the closed I (ON) position when disconnecting, a pre-trip mechanism trips the circuit breaker before the pins are disconnected.

Connecting the Circuit Breaker

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, CSA Z462, NOM-029-STPS, or local equivalent. This equipment must only be installed and serviced by qualified electrical personnel. The circuit breaker must be in the O (OFF) position. Do not use tools to disconnect or connect the circuit breaker. Failure to follow these instructions will result in death or serious injury.

Follow this procedure to connect the circuit beaker:

Step	Action
1		Switch the circuit breaker to the O (OFF) position.
2		Connect the circuit breaker.
3		Replace both mounting screws. Tighten the screws to a torque of 2.5 N•m (22.1 lb-in).

NOTE:

• The auxiliary circuits automatically disconnect because of the connectors located on the base and at the rear of the circuit breaker.

• Open the circuit breaker before connecting it. If the circuit breaker is in the closed I (ON) position when connecting, the pre-trip mechanism trips it before the pins are connected.

Protection Against Direct Contact with Power Circuits

An adapter enables the base to take the same isolation and connection accessories as the unit-mount circuit breaker.

Configuration	Protection index	Description
	IP20	Built-in plug-in base: Without circuit breaker With circuit breaker without terminal shields
	IP40	Built-in plug-in base and circuit breaker with terminal shields.
	IP40	Plug-in base with adapter, terminal shields and blanking plate without circuit breaker: The adapter enables the use of all the connection accessories of the fixed circuit breaker. It is required to equip the plug-in circuit breaker with long and short terminal shields and interphase barriers. Terminal shields are mandatory for plug-in circuit breakers. Short terminal shields are supplied in the plug-in kit. They can be replaced by long terminal shields available as an option. The blanking plate is not supplied by Schneider Electric.
	IP40	Plug-in base with adapter and terminal shields, and circuit breaker with terminal shields.