High Voltage SF6 Circuit Breaker LW25-126 LW25-145 LW25D-126 LW25D-145 LW25-252 LW25A-252

• Breaking Capacity: High Voltage Circuit Breakers
• Operation: Electric Type
• Speed: Normal Type Circuit Breaker
• Model NO.: LW25
• Arc-extinguishing Medium: SF6
• Installation: Open Frame
• Structure: Porcelain
• Poles Number: 3
• Type: Circuit Breaker
• Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection
• Certification: CE, CCC
• Phase: 3
• Outdoor or Indoor: Outdoor
• Rated Voltage: 40.5kv to 550kv
• Rated Current: 2000A, 3150A, 4000A, 5000A
• Transport Package: Non-Fumigation Wooden Box
• Specification: Please refer to the attachment
• Trademark: XD
• Origin: China
• HS Code: 8535291000
• Production Capacity: 5000

Product Description

Outdoor High Voltage Porcelain Type SF6 Gas Power Circuit Breaker for Substation.

Product Description

1.General

H.V.A.C.porcelain type SF6 gas circuit breakers, with voltage from 40.5-550kV and rated current up to 4000A, manufac-tured by our company, are provided with three kinds of operating mechanism, pneumatic, spring and hydraulic type. Motor is used in spring mechanism to charge closing spring and charge opening spring at closing. Disk spring is used in hydraulic mechanism to be charged in stead of traditional compressed nitrogen gas for charge, and hydraulic driv ing is used at both opening and closing. Compressed air is used in pneumatic mechanism as driven force for open while spring is used for close. The three kinds of operating mechanisms have their own features and are used in circuit breakers of different voltage class respectively.Due to the unit structure in circuit breaker, there are advantages of mini-mized number of breaks,lower number of parts, simple structure,high reliability and long period of inspection.

LW25-252/T4000-50 circuit breaker with spring operating mechanism was developed and fnished testing in Sep. 2006.
LW25D-126 (145)/T3150-40 (31.5) single-phase operated circuit breaker with spring operating mechanism was developed and fnished testing in Dec. 2006.
LW25A-252/Y4000-50 three-phase mechanically circuit breaker with hydraulic operating mechanism was develped and fnished testing in Jan. 2007.
LW25-126/T4000-40 special circuit breaker for reactive compensation fnished appraisal with swithing back-to-back capacitor bank current of 1600A, switching reactor in series current of 1600A, breaking single capacitor bank current of 3500-4000A, whinch can meet the requirement of general switchgear and branch switchgear for reactive compensation in UHV.
220kV and above circuit breakers with "XD" brand awarded "China awarded Brand" in Sept . 2007.

2.Normal Service Conditions

2.1 Altitude:≤1000m

2.2 Average relative humidity monthly:≤90%

2.3 Max.wind:≤35m/s

2.4 Pollution class: Third, Class: Fourth class

2.5 Ambient temperature :-35ºC~40ºC

(It's satisfed under the condition of -40ºC in heavy cold area)

2.6 Max.temperature difference daily:25K

2.7 Earthquake intensity:8 degree

2.8 Max.iced thickness:10mm

2.9 Max. radiance from sun:1000W/m2

Note: When product is used under the condition out of above range,

user and manufacturer shall consult to confrm.

Product Parameters

No	Ltem			Unit	LW9-40.5/T	LW9-72.5/T  LW9A-72.5/T	LW25-126T/145T  LW25D-126T/145T	LW25-252T LW25A-252/Y	LW15B-252/Y LW15-252/Q	LW-252/Y
1	Rated Voltage			KV	40.5	72.5	126/145	252	252	252
2	Rated Frequency			Hz	50	50	50	50	50	50
3	Rated Normal Current			A	3150/4000	3150/4000	2000.  3150.  4000	4000	3150.   4000	4000.    5000
4	Rated Short-Circuit Breaking Current			KA	50	31.5/40	31.5/40	40.     50	50	63
5	Rated Short-Circuit Making Current			KA	125	80/100	80/100	100.    125	125	160
6	Rated Short-Time Withstand Currend And Duration			KA	50(3s)	31.5/(4s)/40(4s)	315/(4s)/40(4s)	40/(4s)/50(4s)	50(4s)	63(3s)
7	Rated Peak Whithsand Current			KA	125	80/100	80/100	100.    125	125	160
8	Short-Line fault breaking Current			KA	le×90%			le×75%
9	Rated Out-Of-Phase BreakingCurrent			KA	le×25%
10	Creepage Distance			cm/KV	3.1	3.1	2.5.  3.1	2.5.   3.1		2.5.   3.1
11	1Min Power Frequency Withstand Voltage	Dry Test	Across Open Breaks  To Earth	KV	95+23.4       95	160+42           160	230+95              275	460+145                                  460		520+165/520         460
		Wet Tese	Across Open Breaks  To Earth	KV	95               95	160+42           160	230+95                275	460+145                               460		460+145     460
12	Rated lightning Impulse Whithstand Voltage		Across Open Breaks  To Earth	KV	185+33      185	350+59           350	650+100            650	1050+200                           1050		1188+226/1188         1188
13	5Min.Power FrequenceyWithstand Voltage Under Zero -Gauge pressure			KV	1.3×40.5×√3	1.3×72.5×√3	1.3×145×√3	1.3×252×√3		1.3×252×√3
14	Closing Time			ms	≤150	≤150	≤150	≤110	≤110	55-80
15	Opening Time			ms	≤30	≤30	≤30	≤30	≤25	14-30
16	Breaking   Time			ms	≤60	≤60	≤60	≤60	≤50	≤50
17	Close-Open  Time			ms	40-60	40-60	40-60	50-70	40-60	40-60
18	Operating    Asynchronism      Between  poles		Open	ms	≤2	≤2	≤2	≤30	≤3	≤3
			Close	ms	≤4
19	Rated Reclose Operating Sequence				O-0.3s-CO-180s-CO
20	Rated Pressure Of  SF6 Gas			Mpa	0.5	0.50 ;0.40	0.5;0.40	0.60; 0.40	0.6	0.60
21	Alarm/Lock Pressure Of  SF6 Gas			Mpa	0.45/0.40	0.45/0.40; 0.35/0.3	0.45/0.40; 0.35/0.30	0.55/0.50;0.35/0.33	0.55/0.50	0.55/0.50
22	Annual Leakage Of SF6  Gas			%	≤0.5
23	Number Of Breaks Per Pole			Piece	1
24	Opening Time Of  Mechanisem			Times	≥10000
25	Load On teminal In Y-Direction			N	750	750	1250	1500	1500	1500
26	Load On teminal In X-Direction			N	500	500	750	1000	1000	1000
27	Load On teminal In Z-Direction			N	750	750	1000	1250	1250	1250
28	Resistance Of Man Circuit				≤50	≤50	≤45	≤45	≤42	≤42
29	Operating  Mechanism				Spring mechanism	Spring mechanism	Spring mechanism	Spring Mechanism Or Hydraulic Mechanism	Hydraulic Mechanism OrPneumatic Mechanism	Hydraulic Mechanism
30	Weight Of SF6  Gas Filled For Each CB			kg	6	4	6	30	30	30
31	Weight Of One Set Of CB			kg	1100	1100	1400/2100	3500	4000/4500	3700
32	Applied Standards			GB/T1984,     IEC62271-100,    DL/T402

Detailed Photos