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LW38-40.5 outdoor high voltage AC Sf6 circuit breaker

LW38-40.5 outdoor AC high voltage sulphur hexafluoride circuit breaker (hereinafter referred to as "circuit breaker") is an outdoor high-voltage power distribution switchgear with three-phase AC 50Hz and rated voltage of 40.5kV. It can be used to divide and match rated current and fault current, cast and cut capacitor group and conversion line. It is especially suitable for frequent operation or as a contact breaker. The circuit breaker uses SF6 gas as the arc extinguishing and insulating medium, and is installed outdoors. It adopts an elevated porcelain column structure. The circuit breaker complies with GB 1984-201 4 “High Voltage AC Circuit Breaker”, DL/T 402-2016 “High Voltage AC Circuit Breaker” and JB/T 9694-2008 “High Voltage AC Sulfur Hexafluoride Circuit Breaker” and other technical standards.

parameters

Environmental Conditions

1、 Altitude: no more than 1000m, if the altitude is higher than 1000m, the rated insulation level should be corrected accordingly;

2、 Ambient temperature: upper limit +45℃ , lower limit -40℃ , maximum daily temperature difference of 25K;

3、 Humidity: average daily relative humidity ≤ 95%, average monthly relative humidity ≤90%;

4、Solar radiation intensity: ≥0.1W/cm2;

5、Wind speed: 34m / s;

6、Wind pressure: 700Pa;

7、Pollution level: e level;

8、Ice thickness: ≤10mm;

9、 Tolerance to earthquake: horizontal acceleration 0.3g, vertical acceleration 0.2g

Main Features

1、 Using SF6 gas to extinguish arc and insulation, excellent insulation performance;

2、The structure is simple, and the maintenance period is long;

3、Strong breaking ability and long mechanical life;

4、 Either built-in or external current transformer, high measurement accuracy;

5、 Built-in intelligent wet temperature controller to ensure safe and reliable operation of circuit breakers in high and cold regions;

6、 The overall sealing design of the housing has been improved to effectively prevent the bad weather caused by sandstorms and other bad weather.

Technical Information

Technical Specification
Rated frequency		Hz	50
Rated voltage		kV	40.5
Rated current		A	1250、1600、2000
Rated short-circuit breaking current		kA	31.5
Rated short circuit closing current		kA	80
Rated short-time withstand current		kA	31.5
Rated peak withstand current		kA	80
Rated out-of-step breaking current		kA	10
Rated short circuit duration		S	4
Rated short-circuit breaking current breaking times		Times	1 0
Rated short-time power frequency withstand voltage	Interphase and ground (dry test)	kV/min	95/1
	Fracture (dry test)	kV/min	118/1
	Phase to ground (wet test)	kV/min	80/1
	Auxiliary circuit to ground	kV/min	2/1
Rated lightning impulse withstand voltage	Phase to ground	kV	185
Rated lightning impulse withstand voltage	Fracture	kV	215
Rated operating voltage and auxiliary circuit rated voltage		V	AC220、DC220
Main loop resistance	Rated current 1600A and below	μΩ	≤90
	1600A Rated current greater than 1600A	ms	≤40
Closing time	Under AC voltage	ms	≤100
	Under DC voltage	ms	55~100
Opening time	Under AC voltage	ms	≤60
	Under DC voltage	ms	30~65

			Continued on the table
Technical Specification
Combined-minute time		ms	≥120(Operating state) ≥120
Split-time		ms	≤50
Full break time		ms	≤78
Rated operation sequence		ms	O-0.3S-CO-180s-CO
Moving contact stroke		mm	96±2.5
Contact opening distance		mm	60±1.5
Closing buffer stroke		mm	10±2
Phase-to-phase closure		ms	≤3
Phase-to-phase closure		ms	≤3
Phase spacing		mm	725
SF6 annual air leak rate		%	≤0.5
SF6 gas moisture content (ppm, gauge pressure at 20 ℃)	Handover acceptance value	V/V	≤150
SF6 gas moisture content (ppm, gauge pressure at 20 ℃)	Running value	V/V	≤300
SF6 gas rated pressure (20 ° C gauge pressure)		Mpa	0.45
SF6 gas supplemental pressure (gauge pressure at 20 °C)		Mpa	0.42
SF6 gas blocking pressure (gauge pressure at 20 ° C)		Mpa	0.4
Mechanical life		Times	6000
SF6 gas weight		kg	5
Weight	With CT	kg	800
	Without CT	kg	1000

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Overall and installation dimensions

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LW38-40.5 outdoor high voltage AC Sf6 circuit breaker