33kv/72.5kv/123kv/145kv Outdoor Live Tank Sf6 Insulating Circuit Breaker

• Breaking Capacity: High Voltage Circuit Breakers
• Operation: Manual Type
• Speed: High-Speed Circuit Breaker
• Arc-extinguishing Medium: SF6
• Installation: Outdoor
• Structure: Live Tank
• Model NO.: LW
• Poles Number: 1
• Type: Circuit Breaker
• Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection
• Certification: ISO9001-2000
• Transport Package: Carton with Wooden
• Specification: 33kv/66kv/132kv
• Trademark: HEMG
• Origin: China
• Production Capacity: 5000PCS/Year

Product Description

LW high voltage sulphur hexafluoride circuit breakers belongs to three-phase alternating current 50 Hz high voltage switchgear, which is mainly used for the control and protection of transmission line as well as used as the contact circuit breaker.

The product adopts mixed type self-arc extinguish chamber. The triple pole is equipped with one spring operating mechanism to conduct the tree-pole mechanical operating, so as to realize remote or local operation.
 

1.3. Operating ambient

1.3.1 Height above sea level: 2500 m (special order is available for the high elevation);
1.3.2 Ambient temperature: -30ºC~+40ºC(special orders are available under -30ºC)
1.3.3 Rated wind speed:34m/s;
1.3.4 Shock resistance: level 8;
1.3.5 Dirtiness level: l level III 25mm/kV and level :3.1cm/kV.

1.4.  Technical parameters

1.4.1 See table 1 for main technical parameters of the circuit breaker
Table 1

No.	Name		Unit	Value
				LW-145
1	Rated voltage		kV	145
2	Rated current		A	1600,2000,3150
3	Rated frequency		Hz	50/60
4	Rated short time withstand current (4S)		kA	40
5	Rated short-circuit period		S	4
6	Rated short circuit Dropout current	Short-circuit current	kA	40
		Percent for zero frequency component	-	45%
7	Rated short circuit close current (peak value)		kA	100
8	Rated peak withstand current		kA	100
9	Close-in fault drop-out current		kA	Ie×90% le×75%
10	Rated step-out dropout current		kA	Ie×25%
11	Rated line charging dropout current		A	31.5
12	Initial pole factor		-	1.5
13	Rated operating sequence		-	O-0.3S-CO-180S-CO

 

 

 

Table 1 (continued)

No.	Name				Unit	Value
						LW-145
14	Rated insulation level	1-min power frequency stand voltage (valid value for dry and wet)		Open contact	kV	275
				Space in between		275
				Over the ground		275
		Lightning surge Stand voltage (peak value)		Open contact		750
				Space in between		650
				Over the ground		650
		5minZero gage pressure withstand test (valid value)		Open contact		105
				Over the ground		105
15	Open circuit time				ms	≤60
16	SF6 gas rated pressure (20ºC)				MPa	0.55
	Alarm pressure					0.50
	Interlock pressure					0.45
17	Terminal ST		Vertical orientation		N	1250
			Horizontal orientation			750
			Vertical direction			1000
l 8	Inherent opening time		Rated voltage		ms	26~35
			Low-voltage			26~35
19	Closing time				ms	≤120
20	Opening synchronism				ms	≤2
21	Closing synchronism				ms	≤4
22	Re-closing property Opening-0.3S-closi-ng and opening		First opening time		ms	26~35
			Opening and closing time		ms	280~300
			Closing time		ms	80~120
			Closing and opening time		ms	<50
			Second opening time		ms	26~35
23	Major loop circuit resistance for each pole				μOM	≤40
24	Control circuit voltage				V	DC110/DC220
25	Opening & closing coil voltage				V	DC110/DC220
26	Opening & closing coil current				A	3.67/2
27	Motor voltage				V	AC220/DC220
28	Motor				W	600
29	Heater voltage				V	AC220
30	Mechanical life				times	6000(2000×3)
31	Radio interference voltage				U V	≤500(2500)^*2
32	Leakage rate examination for SF6 gas				-	≤1%
33	Shell protection level				-	IP4×
34	SF6 gas is charged for each unit				kg	7
35	Gross weight for each unit				kg	2700

 

1.4.2 Mechanical parameters
See table 2 for mechanical parameters of the circuit breaker and the operating mechanism.
Table 2

No.	Item	Unit	Data	Remark
1	Stroke	mm	150^+2-4	See figure 13 for stroke measuring of the circuit breaker
2	Contact stroke	mm	27±2
3	Spring mechanism's piston rod stroke	mm	100^0-3
4	Gap between the shear lever roller and the cam	mm	1.4±0.3	As the Circuit breaker is in opening state, the closing spring has been stored with energy.
5	Set nut for the closing spring     Distance to the locating lever	mm	≤55
6	Closing electromagnetic iron stroke C	mm	5.0~5.5	The circuit breaker is in the opening status, see figure 14
	Gap between the Flip-flop and the release device D		2.0~2.5
	C -D		2.5~3.5
	Gap between the flip-flop and the de-bouncing bar E		1.0~2.0
7	Closing electromagnetic iron stroke F	mm	2.8~3.2	See table 15 for the on-position of the  circuit breaker
	Gap between the Flip-flop and the release device G		0.8~1.2
	F - G		1.6~2.4

 

See table 3 for parameters of the control circuit and the secondary group circuit
Table 3

No.	Item		Unit	Data	Remark
1	Opening & closing coil control voltage		V	DC110/220
2	Opening coil current		A	3.67/2
3	Closing coil current		A	3.67/2
4	Motor voltage		V	DC 220/ AC 220	As per purchase contract
5	Power of motor		W	600
6	Motor speed		r.p.m	530
7	Motor current		A	5.5/2.7
8	Heater	Voltage	V	AC 220	As per purchase contract
		Power	W	100(250)

 

1.4.3 See table 4 for gas pressure parameter of SF6 (20ºC) (gage pressure)
Table 4

No.	Item	Unit	Data
1	Rated inflation pressure	Mpa	0.55
2	Alarm pressure for air-in	Mpa	0.50±0.02
3	Bottoming pressure of the circuit breaker	Mpa	0.45±0.02