Description

LW3-12, LW3-12 g I II II series outdoor high-pressure sulfur hexafluoride circuit breaker as sulfur hexafluoride gas arcing and a new type of outdoor high voltage electrical insulating medium. Operating mechanism ( I type) hand machine spring operation mechanism. ( II type) electromotor spring operating mechanism, ( Ill type) DC electromagnetic operating mechanism of three, all kinds of operation mechanism and circuit breaker ontology perfectly combined into a whole. Compared with other 10KV class outdoor circuit breakers, this product has obvious advantages such as simple structure, excellent arc extinguishing and insulation performance, small operation power, high rated parameters, long electrical life and long non-maintenance cycle. The use of this product can not only reduce the floor area. Reduce the project cost and eliminate the fire hazard, and can greatly improve the reliability of the power system.

The circuit breaker has all the functions of the basic circuit breaker, and the coincidence controller or section controller is used to constitute the smart circuit breaker. Cooperate with PT and reclosing controller (subsection controller), it has many functions such as closing on current control, overcurrent protection, short-circuit quick-break three-section compound protection and 1-3 reclosing, small current grounding protection, wired remote control and wireless remote control under bar, and the controller parameters can be set continuously. It is an ideal choice for substation, off-site scatter switch and simple metering switch.

Main technical parameters

Item				Unit	Data
Rated voltage				KV	10
Maximum operating voltage				KV	12
Rated insulation level (when 0.25mpa, 20°C)			Lightning shock pressure withstand full wave	KV	75
			Withstand voltage of 1 min power frequency	KV	42
			Rain withstand test	KV	34
			Reverse impact resistance	KV	85
Insulation level under zero gauge pressure	Withstand voltage of 1 min power frequency			KV	30
	Anti-phase pressure resistance of 1 min			KV	30
	5min maximum phase voltage			KV	9
Rated current				A	400,630
Rated short circuit breaking current				KA	6.3 8 12.5
Out-of-phase earth rec losing switching current				KA	5.5 7.1 10.9
Open current under zero gauge pressure				A	400 630
Rated operating sequence					0-0.3s-C0-180s-CO
Rated closing current (peak)				KA	16 20 31.5
Rated dynamic stability current (peak)				KA	16 20 31.5
Rated thermal stability current				KA	6.3 8 12.5
Stable heat stable time				s	4
Just close speed				m/s	2.6±0.2
Just points speed				m/s	2.6±0.2
Proper closing time II Type Ill Type				s	≤0.06
Proper closing time		I Type		s	≤0.06
		II Type Ill Type		s	≤0.04
Rated working pressure				Mpa	0.35 (20°C)
Minimum working pressure				Mpa	0.25 (2°C)
In a flat rate				%	<0.01
Mechanical stability (continuous integration) operation				Times	6000
Weight		I Type		Kg	122
		II Type		Kg	30
		Ill Type		Kg	132
SF6 gas moisture content				PPM	≤150

Outline and mounting dimensions

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Outdoor sulfur hexafluoride circuit breaker LW3-12