Product intruduction
LW36-40.5 outdoor self energy HV AC SF6 circuit breaker is an outdoor three phase HV AC equipment used in electricity grids with altitudes of no greater then 3000m, environment termperature of no less then -30oC, local pollution classes of no higher than Class IV, and AC 50Hz with maximum voltage of 40.5kV. It is suitable for the control and protection of HV supply and tranformation lines in power plants, transformer, stations, and industrial and mining enterprise. It can also be used as a connection circuit breaker.
LW36-40.5 self energy HV SF6 circuit breaker is equipped with advanced hot-expansion plus auxiliary pressure gas self-energy arc extinguishing technology and matched with new type spring actuating mechanism. It has features such as long electrical endurance, small operating power, high electrical and mechanical reliability, high technical parameters, and moderate price. It is the first choice product for current 40.5kV electircity grids.
Feature
Its main performance features are as follows:
1. High rated parameters
2.High electrical reliability
3.High reliability of operating mechanism
.
Main technical parameter 

1	Rated voltage	kV	40.5
2	Rated power frequency withstand voltage (1min)
2.1	To earth	kV	95
2.2	Across open contact	kV	118
3	Rated lightning impulse withstand voltage
3.1	To earth	kV	185
3.2	Across open contact	kV	215
4	Rated frequency	Hz	50/60
5	Rated curent	A	2500
6	Rated short-circuit breakering current (Isc)	kA	31.5
7	Rated short-circuit making current (peak)	kA	80
8	Rated hsort-time withstand current	kA	31.5
9	Rated peak withstand current	kA	80
10	Rated duration of short-circuit	s	4
11	Rated operating sequence		o-0.3s-CO-180s-CO
12	Rated single capacitor bank breaking current	A	630
13	Rated line charging brekaing current		50
14	Rated out of phase breaking current	kA	8
15	Double earth fault breaking current	kA	27.4
16	Mechanical endurance	Times	10000
17	Number of rated short-circuit breaking current	times	20
18	Rated SF6 gas pressure (20oC gauge pressure)	Mpa	0.45
19	Gas refilling alarm pressure	Mpa	0.4
20	Minimum functional pressure	Mpa	0.35
21	Annual leakage of SF6 gas	%	≤0.5
22	Gas humidity content (L/L) (20oC at handover)	L/L	≤150x10-6