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Supplemental and Obsolescence Digest 174

International Miniature Circuit Breakers

QO® Plug-on and Bolt-on Connections

 

General Description

In 1955 Square D Company introduced the QO Plug-on System and revolutionized the way electrical contractors install miniature circuit breakers in the United States. Today as part of Schneider Electric we offer the same Plug-on System technology around the world. A full line of IEC certified QO products are available for residential, commercial and industrial applications.

 

Table 7.1:

International Miniature Circuit Breaker Description

Circuit Breaker	Description	1Ø Consumer Units	3Ø Distribution Boards
QO-MBGX	Main circuit breakers with residual current protection	X	—
QO-M/QO-L	Main switches and lugs	X	X
QOE	Branch circuit breaker	X	X
QOE-RCBO	Branch circuit breaker with residual current protection	X	X
QOVS	Branch circuit breaker	X	X
QOXD	Branch circuit breaker	X	X

 

Characteristics

●	Circuit breakers are rated 240 Vac single phase and 415 Vac three phase, 50/60 Hz.

●	Circuit breakers are available in 1-, 2- or 3-pole construction.

●	Thermal trip elements are factory calibrated to 40¡C (IEC 947-2) and 30¡C (IEC 898) ambient temperature.

●	RCBO devices available with 10 mA, 30 mA and 100 mA residual current protection.

●	Trip-free handle ensures tripping even when the circuit breaker is held or locked in the ON position.

●	Circuit breakers are in compliance with international standards set by the International Electrotechnical Commission (IEC).

●	The CE marking is located on each circuit breaker in accordance with the low voltage directive of the European Union.

●	The entire QO circuit breaker family provides the advantage of a plug-on connection. (Bolt-on connections also available)

 

Accessories

 

Accessory	Description	Cat. No.	QOE	QOE-RCBO	QOXD
Handle Tie	Ties two 1P circuit breakers together	QO1HT			X
Handle Lock-Off (Clamp)	Attaches to 1P circuit breaker handles	QO1LO			X
	Attaches to 1P, 2P, 3P circuit breaker handles	HLO1			X
Handle Padlock Attachment	Attaches to 1P, 2P, 3P circuit breaker handles	QOEPLA	X
	Attaches to 1P circuit breaker handles	QOE1PL		X
	Attaches to 1P circuit breaker escutcheon (fixed)	QO1PA			X
	Attaches to 2P, 3P circuit breaker escutcheon (fixed)	QO1PL			X
	Attaches to 1P circuit breaker handles (removable)	QOHPL			X
	Attaches to 2P, 3P circuit breaker handles (removable)	QO1HPL			X
	Attaches to 2P circuit breaker handles (removable)	GFI2PA