AB-3S-12 outdoor high-voltage fast permanent magnet vacuum circuit breaker

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Overview

The AB-3S-12 series outdoor high-voltage three-phase permanent magnet vacuum circuit breaker is a new generation of pole-mounted intelligent vacuum circuit breaker developed by our company by integrating advanced technologies from home and abroad, drawing on the strengths of various sources, adopting a brand-new design concept, and utilizing high-tech methods. This product can be used as a switch for the 10kV side of the main transformer and the 10kV outgoing line in a 35kV substation, or as a pole-mounted switch in a distribution network. Combined with various control units produced by our company, it can easily realize control, protection, satellite measurement, and communication, making it the preferred equipment for achieving distribution network automation and miniaturization.

Model Meaning

AB-3S-12 outdoor high-voltage fast permanent magnet vacuum circuit breaker

Usage conditions

◆Ambient temperature: not exceeding 40℃; average daily temperature not exceeding 35℃; minimum ambient air temperature -25℃.

◆Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%; water vapor pressure: daily average not exceeding 2.2 kPa; monthly average not exceeding 1.8 kPa;

◆Altitude: Not exceeding 2000m;

◆The surrounding area is not significantly contaminated by dust, smoke, corrosive and/or flammable gases, vapors, or salt spray.

◆Vibrations or ground movements from outside the switching and control equipment are negligible;

◆The amplitude of induced electromagnetic interference in the secondary system shall not exceed 1.6kV.

Main technical parameters

Main technical parameters of circuit breaker

Project		Unit	Parameter
Rated voltage		kV	12
Rated insulation level	1-minute power frequency withstand voltage (RMS)	kV	42
	Lightning impulse withstand voltage (peak value)	kV	75
Rated frequency		Hz	50
Rated current		A	630/1250
Rated short-circuit breaking current		kA	20
Rated short-circuit making current (peak value)		kA	50
Rated operating sequence			Ot1(0.3s)-COt2(3s)-COt2(3s)-CO
Thermally stable current (4S)		kA	20
Dynamically stable current (bee value)		kA	50
Rated short-circuit current breaking times		次	30
CT ratio			30-1250/1 (5)
Operating power supply voltage		V	-220(-110)
Creepage distance			≥ 31
Number of machine operations		次	10000
Weight		kg	90+40 (quarantine)

Main technical parameters

Mechanical characteristics and technical parameters of circuit breaker after assembly and adjustment

Project	Unit	Parameter
Contact gap	mm	11±1
Contact travel (measures the relative position of the contact spring when it is open or closed)	mm	3±0.5
Average closing speed	m/s	0.6±0.2
Average tripping speed (per 10mm)	m/s	1.0-1.4
Closing time	ms	30-50
Opening time	ms	30~70
Contact closing bounce time	ms	≤2
Asynchronous closing of three-phase contacts	ms	≤2
Asynchronous tripping of three-phase contacts	ms	≤2
Resistance of each phase conductive circuit	μΩ	≤120; with isolation ≤170
Interphase center distance	mm	280±2