> Products > SF6 Circuit Breaker > LW36-40.5 SF6 Circuit Breaker

New Products

LW36-40.5 SF6 Circuit Breaker

Item:LW36-40.5 SF6 Circuit Breaker
SF6 Gas: Excellent arc extinguishing performance.
Compact Design: Simple structure and space-efficient.
Reliable Operation: Good opening performance with balanced operation.
Sealed Breaker: Reduced operational noise.
Low Maintenance: Minimal inspection and maintenance requirements.

Send Inquiry

Product Description

Item:LW36-40.5 SF6 Circuit Breaker

TheLW36-40.5 SF6 Circuit Breaker is a three-phase,50Hz outdoor high-voltage electrical equipment designed for the control and protection of40.5kV power transmission and distribution systems. It is suitable for applications including:

· Tie circuit breakers.

· Switching capacitor banks.

· Measurement and protection with attachable current transformers.

Key Features:

Compliance with Standards: Meets the national standardGB1984-1989 ("AC High Voltage Circuit Breaker") and the International Electrotechnical Commission standardIEC60056: 1987 ("High Voltage AC Circuit Breaker").

Excellent Breaking Performance:

o Usescompressed gas arc extinguishing chamber for rapid arc quenching.

o Short arcing time for enhanced protection.

o Capable ofbreaking 25 kA 20 times under rated voltage without performance degradation.

Low Maintenance:

o No need for maintenance orreplacement of SF6 gas during its service life.

o Offerslong electrical life with minimal intervention.

Reliable Insulation:

o Can withstand40.5 kV for 10 minutes at zero gauge pressure, ensuring robust insulation performance.

High Mechanical Reliability:

o Designed forfrequent operation, withstrong closing ability.

o Can safelyopen and close capacitor bank currents of up to400 amps without re-ignition.

o Capable of safely switchingempty long lines (up to25–50 km) without issues like arcing or burnout.

Compact and Simple Design:

o Compact size with asimple structure.

o Long periods of maintenance-free operation, ensuring reduced downtime and costs.

Model Description

Main Technical Parameters

No.	ltem		Unit	Data
1	Rated	voltage	kv	40.5
	Rated insulation level	Lightning impact withstand voltage (full crest value)	kv	185
		Power frequency withstand voltage (Imin)	kV	95
2	Rated current		A	1600 2000
3	Mechanical life		次 fime	3000
4	Rated pressure of sulphur hexafluoride gas lgauge pressure at 20℃)		MPA	0.50
5	Alarm pressure/minimum functional pressure (gauge pressure at 20℃)		MPA	0.47/0.45
6 7	Rated short circuit switching current		kA	25 63	31.5
	Rated short-circuit closing current(peak)		KA		80
8	Rated Short-Time withstand current(thermal stable current)		kA	25	31.5
9	Rated Short-Time withstand current (thermal stable current)		kA	60	80
10	Rated short circuit switching current		kA	63	8
11	The cumulative number of switching times under rated short-circuil switching		次Times	15	10
12	Rated short circuit duration		S	4
13	Closing time lat rated operating voltagel			≤0.1
14	Switching time (at rated operating voltage)		5	≤0.06
15	Rated order of operation			C-0.3s-CO-180s-CO
16	Rated opening and closing monomial capacitor bank current		A	400
17	In leakage		%years	≤1
18	Water content of sulfur hexafluoride gas (V/V)			≤150x10-9
19	CT14 spring operating mechanism with rated operating voltage
	Closing coil,opening coil voltage		V	IACI:220 380 IDC):48 110 220
	Energy storage motor voltage		V	IAC):220 380 (DC):110 220
20	Sulfur hexafiuoride gas weight		KG	8
21	Weight of circuil breaker [nduding operating mechanism)		KG	1400

Structure And Mounting Dimensions

Working Environment：

Item:LW36-40.5 SF6 Circuit Breaker

Working Environment of LW36-40.5 SF6 Circuit Breaker:

Ambient Temperature Range:

Min: -30°C

Max: +40°C

(For special conditions, can be customized for higher or lower temperature ranges.)

Altitude:

Can be used up to1,000 meters above sea level.

For altitudes above 1,000 meters, adjustments may be necessary to ensure proper performance.

Humidity:

The relative humidity should not exceed95% (non-condensing).

Pollution Level:

Suitable for environments withmoderate pollution levels (up topollution degree III as per IEC standards).

Seismic Resistance:

Designed to withstandearthquake intensity of up to8 degrees on the Richter scale.

Wind Resistance:

Can withstand wind speeds up to160 km/h, making it suitable for outdoor installations in areas subject to high winds.

Possible causes of electrical circuit failure

Item:LW36-40.5 SF6 Circuit Breaker

Possible Causes of Electrical Circuit Failure:

Insufficient SF6 Gas Pressure:

Low SF6 gas pressure can impair the breaker’s arc-extinguishing ability, leading to failure to interrupt faults properly. Regular gas pressure checks are necessary for reliable operation.

Contamination of SF6 Gas:

Contaminants (e.g., moisture, air, or particulates) in the SF6 gas can degrade its dielectric properties and arc-quenching effectiveness, resulting in faulty operation.

Mechanical Failures:

Wear and tear on internal components (e.g.,contacts,springs, oroperating mechanisms) can lead to malfunctioning, such as failure to close or open the breaker when needed.

Overcrrent or Short Circuit Conditions:

If the breaker is subjected tooverload orshort-circuit conditions beyond its rated capacity, it may fail to interrupt the fault current effectively, potentially leading to system damage.

Product Real Shot

FAQ

Item:LW36-40.5 SF6 Circuit Breaker

1.What is the rated voltage of the LW36-40.5 SF6 Circuit Breaker?

· The LW36-40.5 SF6 Circuit Breaker is designed for arated voltage of40.5 kV, suitable for 35 kV power transmission and distribution systems.

2.What type of gas does the LW36-40.5 use for arc extinguishing?

· The breaker usesSF6 (Sulfur Hexafluoride) gas, known for its excellent dielectric and arc-extinguishing properties, ensuring reliable operation even under high fault conditions.

3.What is the mechanical life of the LW36-40.5 SF6 Circuit Breaker?

· Themechanical life of the LW36-40.5 SF6 Circuit Breaker is designed to exceed3,000 operations, making it suitable for frequent switching in demanding environments.