Lw38

Basic Info.

Model NO.	LW38
Type	Circuit Breaker
Function	Conventional Circuit Breaker, Break Load Current, Over-Load Current
Certification	ISO9001-2000
Transport Package	Export Box
Trademark	DGG
Origin	China
HS Code	8504311000
Production Capacity	100000PCS/Year

Product Description

GENERAL
LW38-40.5w outdoor AC High-Voltage Sulfur Hexafluoride(SF6) circuit breaker (hereinafter referred to as "circuit breaker") is an outdoor high-voltage distribution switchgear with three-phase AC 50Hz and rated voltage of 40.5kV. It can be used to open and close rated current and fault current, switch on and off capacitor banks, and switch lines. It is especially suitable for frequent operation and can also be used as a contact circuit breaker. The circuit breaker uses SF6 gas as the arc extinguishing and insulation quality is installed outdoors and adopts the elevated porcelain column structure.The circuit breaker complies with technical standards such as GB / t1984-2014 high voltage AC circuit breaker, DL / t402-2016 high voltage AC circuit breaker, and JB / T 9694-2008 high voltage AC sulfur fluoride circuit breaker.
MODEL DESCRIPTION

USAGE: ENVIRONMENTAL CONDITION

1. Altitude: ≤ 1000m, If the altitude is higher than 1000m, the rated insulation level shall be corrected accordingly.
2. Ambient temperature: -40 oC ~ +45 oC,
3. Maximum daily temperature difference: 25 K
4. Humidity: Average daily relative humidity: 95%, average monthly relative humidity: 90%.
5. Sunshine intensity: not more than 0.1W/cm 2
6. Wind Speed: 34m/s
7. Wind pressure: 700Pa
8. Pollution level: e - level
9. Icing thickness: Not more than 10mm
10. Resistance to floor drain: horizontal acceleration 0.3g, vertical acceleration 0.2g

MAIN ADVANTAGES
☆ SF6 gas arc extinguishing and insulation, excellent insulation performance;☆ Simple structure, long maintenance cycle;☆ Strong breaking capacity and long mechanical life;☆ Either built-in or external current transformer, with high measurement accuracy;☆ Built-in intelligent wet temperature controller to ensure the safe and reliable operation of the circuit breaker in cold regions;☆ The overall sealing design of the shell is improved to effectively prevent the adverse effects of sandstorms and other bad weather on the circuit breaker.
MAIN TECHNICAL PARAMETERS

No.	Item		Unit	Data
1	Rated frequency		Hz	50
2	Rated voltage		kV	40.5
3	Rated current		A	1250 / 1600 / 2000
4	Rated Short-Circuit Breaking Current		kA	31.5
5	Rated Short-Circuit Closing Current			80
6	Rated Short-Time Withstand Current			31.5
7	Rated Peak Withstand Current			80
8	Rated Out of Step Breaking Current			10
9	Rated Short-Circuit Continuous Time		s	4
10	Rated Short-Circuit Breaking Current Breaking Times		Times	10
11	Rated short-time power frequency withstand voltage	Interphase, to earth(dry)	kV/min	95/1
		Fracture (dry)		118/1
		Interphase, to earth(wet)		80/1
		Auxiliary circuit to earth		2/1
12	Rated lightning impulse withstand voltage	Interphase, to earth	kV	185
		Fracture		215
13	Rated Operating Voltage and Auxiliary Circuit Rated Voltage		V	AC220, DC220
14	Main Circuit Rsistance	Rated Current 1600A and below	μΩ	≤ 90
		Rated Current more than 1600A		≤ 40
15	Closing Time	Under AC Voltage	ms	≤ 100
		Under DC Voltage		55 ~ 100
16	Opening Time	Under AC Voltage		≤ 60
		Under DC Voltage		30 ~ 65
17	Closing - Opening Time			≤ 120
18	Opening - Closing Time			≤ 50
19	Full Breaking Time			≤ 78
20	Rated Operating Order			O - 0.3s - CO -180s- CO
21	Moving Contact Travel		mm	96±2.5
22	Contact Opening Distance		mm	60±1.5
23	Closing buffer Stroke		mm	10±2
24	Phase-to-Phase opening Synchronism		ms	≤ 3
25	Phase-to-Phase closing Synchronism		ms	≤ 3
26	Phase spacing		mm	725
27	Annual Gas Leakage rate of SF6		%	≤ 0.5
28	SF6 Gas Moisture content (ppm, gauge pressure at 20 degrees Celcius)	Handover Acceptance Value	V/V	≤ 150
		Distance Travel		≤ 300
29	SF6 Gas Rated Pressure (gauge pressure at 20oC)		MPa	0.45
30	SF6 Gas Replenish Pressure (gauge pressure at 20 oC)			0.42
31	SF6 Gas Locked Pressure (gauge pressure at 20oC)			0.4
32	Mechanical Life		Times	6000
33	SF6 Gas Weight		Kg	5
34	Weight (with CT)			800
	Weight (without CT)			1000
Note: If the altitude is over 1000m, the rated insulation level should be modified as appropriate.

OUTLINE AND INSTALLATION DIMENSION