LW8-40.5 Type Outdoor AC HV SF6 Circuit Breaker Made in China - Suppliers and Manufacturers

Product Description

1.Introduction of LW8-40.5 Type Outdoor AC HV SF6 Circuit Breaker

LW8-40.5 Type Outdoor AC HV SF6 Circuit Breaker is a kind of outdoor HV electrical equipment, three-phase, AC 50Hz. LW8-40.5 Type Outdoor AC HV SF6 Circuit Breaker is used not only for control and protection for 35kV power transmission and distribution system, but also for connecting circuit breaker and opening and closing capacitor bank, as well as for measurement and protection when it is equipped with current transformer.

2. Parameter (Specification) of LW8-40.5 Type Outdoor AC HV SF6 Circuit Breaker

No.	Item		Unit	Parameter
1	Rated voltage		kV	40.5
2	Rated insulation level	1min power frequency withstand voltage	kV	185/215(fracture)
2	Rated insulation level	Lightning impulse withstand voltage	kV	95/118(fracture)
3	Rated current		A	2000
4	Mechanical endurance		time	5000
5	Rated pressure of SF6 gas(20ºC meter pressure)		Mpa	0.45
6	Locking pressure (20ºC meter pressure)		Mpa	0.40
7	Lowest ambient temperature		ºC	-30
8	Rated short-circuit breaking current		kA	31.5
9	Rated short-circuit making current(peak)		kA	80
10	Rated short time withstand current(thermal current)		kA	31.5
11	Rated peak withstand current(dynamic current)		kA	80
12	Rated out-of-phase breaking current		kA	7.9
13	Breaking times of the rated short-circuit breaking current:		time	16
14	Close time		s	≤0.1
15	Open time		s	≤0.06
16	Rated operation sequence			O-0.3s-CO-180s-CO
17	Rated breaking/opening current of single capacitor group		A	400
18	Last time of short circuit current		s	4
19	SF6 leakage rate (yearly)			≤1
20	Moisture Content of SF6 gas(20ºC)		Ppm(v/v)	≤150
21	Rated operating voltage of spring operation mechanism
	Voltage of closing and opening coil		V	AC 220, 380 DC:48, 110 , 220
	Voltage of energy storage motor		V	AC 220 DC 220
22	Weight of SF6 gas		kg	8
23	Weight of circuit breaker (including operation mechanism)		kg	1400

Table 2

No.	Item	Unit	Technical Requirements	Test conditions and methods
1	Travel of movable contact	mm	95±2	Measurement of movable contact travel refer to darawing12
2	Clearance between contacts	mm	605±1.5	Measurement of Clearance between movable and fixed contact refer to drawing 12a
3	Three-phase switch-on asynchrony	ms	≤3	Measurement of pole distance difference between movable and fixed contact refer to darawing14
4	Three-phase switch-off asynchrony	ms	≤2	Measurement of pole distance difference between movable and fixed contact refer to drawing 15
5	Resistance of main loop	μΩ	≤120	Measurement to DC voltage drop method, put in 100A
6	Speed at instant of contacts touching	m/s	3.2±0.2	Rated voltage and measurement method refer to drawing 14
7	Speed at instant of contacts disconnecting	m/s	3.4±0.2	Rated voltage and measurement method refer to the drawing 15
8	Cuisine stroke of making	mm	10+0.5 -0.1	Refer to drawing 6 under the closing status
9	positioning gap of Cuisine stroke of making	mm	1-2	Refer to drawing 6 under the closing status
10	Partial charging 40.5kV 25.7kV	PC	20	At rated gas pressure, use partial instrument to put 40.5kV between two outgoing wires for 1min, then drop to 25.7kV equably
10	Partial charging 40.5kV 25.7kV	PC	10

3. Product application for LW8-40.5 Type Outdoor AC HV SF6 Circuit Breaker

a. Altitude to be not more than 1000m.
b. Ambient temperature: -30ºC - + 40ºC, the average value of 24H to be not more than 35ºC;
c. Relative humidity: the daily average value to be not more than 95%, monthly average value to be not more than 90%,
d. Speed of wind: not more than 35km/s
e. Contamination condition to be III grade, porcelain bushing creepage distance shall be 1050 mm (nominal creepage ratio to be not less than 25mm/kV);
f. The ambient air should be free of the flammable material, explosive danger, chemical corrosive and intensive shake.

4. Product Qualification for LW8-40.5 Type Outdoor AC HV SF6 Circuit Breaker

LW8-40.5 Type Outdoor AC HV SF6 Circuit Breaker is equipped with CT14 type spring operating mechanism. And it is conformed to the requirements of the standard of GB1984-89 and IEC56 .