40.5kV Outdoor High Voltage SF6 Circuit Breaker (LW8)

Model NO.: LW8-40.5/2000-40
Delivery: FOB
Minimum order quantity: 1 piece

Quantity:

Product Description

Basic Info.

Model NO.	LW8-40.5/2000-40
Poles Number	3
Type	Circuit Breaker
Function	Conventional Circuit Breaker
Certification	ISO9001-2000, CE, CCC
Rated out of Step Breaking Current	10kA
Short-Circuit Breaking Current	40kA
Rated Short Circuit Duration	4s
Mechanical Life Time	3000 times
Moving Contact Travel	93-97mm
Trademark	VACEM
Origin	Wenzhou, China

1.General description

a. The circuit breaker is outdoor small ceramic column structure, which equipped with CT14 spring operation mechanism; mechanism and main part connected with simple installation. It has features of convenient adjustment, reliable operation, suitable for frequent operation; mechanism service life more than 3000 times;

b. Adopt air-compression arc-extinguishing structure, with strong breaking capacity, 40kA total breaking times up to 12, which is the highest in China;

c. Reliable sealing performance. Adopt import seal; dynamic seal adopts"V"type sealing ring with spring pressure compensation structure; the transformer secondary wiring board matched by cooperative enterprises, to ensure the annual leakage rate less than 1 %;

d. Inner current transformer adopts micro crystallizing alloy high magnetic materials, with accurate class up to grade 0.2 or grade 0.2S. According to users' needs, it can be matched with 12 transformers, to meet the load line of 50 km without restrike.

2.Main technical parameter

Item	Unit	Data	Technical parameter
Rated voltage	kV	40.5
Rated insulation level lightning impulse withstand voltage(peak)	kV	185
Rated insulation level 1 min P.F. withstand voltage	kV	95
Rated current	A	2000
Mechanical life time	time	3000
Rated air pressure of SF6(psig at 20ºC)	Mpa	0.05
Alarm pressure/Min.function pressure (psig at 20ºC)	Mpa	0.47/0.45
Rated short-circuit breaking current	kA	40
Rated short circuit making current(peak value)	kA	100
Rated short time withstand current(thermal stability current)	kA	40
Rated peak withstand current(dynamic stability current)	kA	100
Rated out of step breaking current	kA	10
Rated breaking times under short circuit breaking current	time	12
Rated short circuit duration	S	4
Closing time(under rated operation voltage)	S	≤0.1
Opening time(under rated operation voltage)	S	≤0.06
Rated operating sequence		O-0.3s-CO-180s-CO
Rated making single capacitor bank current	A	400
Annual leakage rate	%	≤1
SF6 water content(V/V)		≤150×10-6
Rated operation voltage of matched CT14 spring operation mechanism
Closing and opening coil voltage	V	AC:220 380 DC:48 110 220
Energy storage motor voltage	V	AC:220 380 DC:110 220
Weight of SF6 gas	kg	8
Weight of circuit breaker(including operation mechanism)	kg	1400
Moving contact travel	mm	95±2	Measure moving contact travel
Opening distance between contacts	mm	60±1.5	Measure distance between moving and fixed contact
Pole-to-pole closing synchronous	ms	≤3	Measure pole distance difference between moving and fixed contact
Pole-to-pole opening synchronous	ms	≤2	Measure pole distance difference between moving and fixed contact
Main circuit resistance	mΩ	≤120	Measure DC voltage reduction
Closing speed	m/s	3.2±0.2	Rated air pressure, measuring method
Opening speed	m/s	3.4±0.2	Rated air pressure, measuring method
Closing buffer distance	mm	10+0.5(-1.0)	Under closing state
Spacer of closing buffer	mm	1-2	Under closing state
Partial 48.6kV	Pc	20	Measure by partial measuring device under rated air pressure; apply voltage 48.6kV on the two out-line ends of the circuit breaker for 1 min, then reduce the voltage to 28kV to measure
Discharge 28kV	Pc	10