LW10B-550 SF6 Circuit Breaker

one post, two interrupters and one mechanism each pole. It could operate in single-pole mode and in three-pole mode as well.

1.General Description

LW34-40.5 series outdoor high voltage SF6 circuit breaker is 3-phase DC 50 Hz outdoor high voltage equipment. Is designed for control and protection of the electric power distribution and transimission system with voltage up to 40.5kV. It could be also applied circuit breaker connection and switching operation of capacity bank.

2.Main Features

2.1 LW34-40.5 is outdoor Insulator pillar structure,mechanism and main body have level, enhance level,vertical,handcart and railway electrification layout form.Bulk small, light weight, simple structure, convenient debugging installation, maintenance cycle length.

2.2 Good breaking performance, arcing time short,break short current 40kA

capacity current 630A.

2.3 The high pollution levels,altitude ≤3000m

2.4 surface is deal with dacromet or hot-dip galvanizing,shell use Astainless steel materials, corrosion resistance capability.

2.5 Every phase with 4 CT, or outside CT,measure accuracy could reach 0.2s

2.6 Combined with the transition stent devices for the oil and other products to replace.

3.Main technical data

No.	Name		Unit	Data
1	Rated voltage		kV	40.5
2	Rated insulation level	Lighting impulse voltage  (rms) Power frequency withstand voltage   1min	kV kV	185/215(break) 95/118(break)
3	Rated current		A	160025003150
4	Mechanicalendurance		Time	3000
5	SF6 gas rated pressure  (20 )		MPa	0.45
6	SF6 gas re-filled pressure  (20 )		MPa	0.42
7	SF6 gas lock-out pressure (20)		MPa	0.40
8	Rated short circuit breaking current		kA	40
9	Rated short circuit making current (rms)		kA	100
10	Rated short withstand current (thermal stability current)		kA	40(4s)
11	Rated withstand current (rms) (dynamic stability current )(rms)		kA	100
12	Rated out-phase breaking  current		kA	10
13	Close time (rated operation voltage )		ms	60≤t≤100
14	Open time  (rated operation voltage)		ms	55≤t≤65
15	Rated  operation sequence			o-0.3s-co -180s-co
16	Rated CO single capacity bank current		A	630
17	Annual leakage of gas		%	£1
18	SF6 moisture content20		ppm (v/v)	£150

LW10B-550 SF6 Circuit Breaker