Components - MPACT Withdrawable circuit breaker

MPACT - Withdrawable circuit breaker

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Features

Pre-mounted into a self-contained 'cassette', this versatile circuit breaker can be inserted or withdrawn via sliding rails using a racking drive mechanism controlled by a racking handle.

It provides three set positions: Disconnected | Test | Connected.

Any attempt to withdraw the unit whilst in service will automatically trip the breaker, either by the racking position safety mechanism or by the insertion of the racking handle.

It can be racked to the disconnected position with the cubicle door closed or open.

Insulated shutters to isolate the main contact zone
Front access padlocking for safety shutters
Secure padlocking in the "Disconnect" position
Clearly visible operational position indication
Carriage position switch (optional)
Termination: Flat copper palms (standard) with captive M10 fixing nuts
'T' terminal adaptors for horizontal/vertical connection (optional)
Front access connections (optional)
Automatic disconnect of secondary circuits
Lifting lugs for ease of removing the circuit breaker from the cassette
Front access of secondary terminals for simple connection
Cassette side mounting fixing parts (optional)

Installation

Circuit breakers are delivered pre-mounted in the cassette (standard).

Versatile fixing arrangements allow mounting onto any switchboard or cubicle using four M8 bolts (see dimensional drawings for mounting details and recommended clearance distances).

Earthing point situated on the right hand side of cassette (front view).

MPACT - Withdrawable circuit breaker

Performance

Characteristic	Symbol	Units
Rated current (40°C)	In	A		400		630		800			1000
Endurance (number of operating cycles)
Mechanical (with maintenance)				20000		20000		20000			20000
Mechanical (without maintenance)				10000		10000		10000			10000
Electrical (at rated current)				5000		5000		5000			5000
Rated service voltage (50/60 Hz)	Ue	V		690		690		690			690
Rated insulation voltage (50/60 Hz)	Ui	V		1000		1000		1000			1000
Rated impulse withstand voltage	Uimp	V		8000		8000		8000			8000

Number of poles				3 & 4		3 & 4		3 & 4			3 & 4
Rating of 4th pole				100%		100%		100%			100%
ACB type				S	N	S	N	S	N	H	S	N	H
Frame size				1	1	1	1	1	1	2	1	1	2

Rated ultimate short-circuit	Icu	kA (rms)	220V	50	65	50	65	50	65	80	50	65	80
breaking capacity			415V	50	65	50	65	50	65	80	50	65	80
			500V	50	65	50	65	50	65	80	50	65	80
			615V	50	50	50	50	50	50	65	50	50	65
			690V	40	40	40	40	40	40	60	40	40	60

Rated service short-circuit	Icu	kA (rms)	220V	50	65	50	65	50	65	80	50	65	80
breaking capacity			415V	50	65	50	65	50	65	80	50	65	80
			500V	50	65	50	65	50	65	80	50	65	80
			615V	50	50	50	50	50	50	65	50	50	65
			690V	40	40	40	40	40	40	60	40	40	60

Rated short time withstand current
1 second	Icw	kA (rms)		50	65	50	65	50	65	80	50	65	80
3 seconds	Icw	kA (rms)		40	50	40	50	40	50	50	40	50	50
Rated short-circuit making capacity	Icm	kA (peak)	415V	143	143	143	143	143	143	176	143	143	176
			500V	143	143	143	143	143	143	176	143	143	176
			600V	143	105	143	105	143	105	143	105	105	143
			690V	84	84	84	84	84	84	105	84	84	105
Power dissipation at In (Fixed breaker)		Watts		16	11	39	27	63	43	23	106	68	36
Power dissipation at In (Withdrawable)		Watts		33	22	75	53	127	86	49	211	135	77

Design and specifications are subject to changes without notice

Dimensions

Dimensional Drawings - Type S - 3 pole - Frame size 1, In = 2000A and 2500A (max)

Copperwork must be supported within 200 mm of breaker connections – busbars or cables. All connections to be tightened to 50Nm.

Dimensional Drawings - Type S - 4 pole - Frame size 1, In = 2000A and 2500A (max)

Copperwork must be supported within 200 mm of breaker connections – busbars or cables. All connections to be tightened to 50Nm.