69kv 72.5kvsf6 Gas Insulatedcircuit Breaker Lw36-72.5

• Customization: Available
• Breaking Capacity: O
• Operation: Manual Type
• Model NO.: LW36-72.5
• Speed: Normal Type Circuit Breaker
• Arc-extinguishing Medium: Oil-immersed Type
• Installation: Fixed
• Structure: MCCB
• Poles Number: 2
• Type: Circuit Breaker
• Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvoltage Protection)
• Certification: ISO9001-2000
• Rated Current: 1250A
• Rated Voltage: 36
• Color: Black
• Voltage: 72.5
• Transport Package: Wooden Box
• Specification: 0.5
• Trademark: XIKAI
• Origin: Zhejiang, China

Product Description

LW36-72.5/1250A outdoor self energy high-pressure sulfur hexafluoride circuit breaker is a three-phase ac 50/60 Hz outdoor high voltage electric transmission and transformation equipment, By Opening or closing the rated current and fault current and conversion circuit to realizing the protection,control and operation of the power transmission and transformation system. The product can open or close brake and operate the auto reclosing very fast and realize the linkage of three pole electric.

The circuit breaker using the latest design principle, And it has much feature such as simple construction,small volume material consumption, It is necessary to the operation of the energy is small and high reliability,easy to install,low noise and so on. It is developed a new generation of high-pressure sulfur hexafluoride circuit breakerby ourselves.

2 Use of environmental conditions

2.1Ambient temperature:  -40°C--+ 50°C

2.2Wind pressure:≤700 pa

2.3Altitude:≤3000m

2.4Seismic intensity:≤9degrees

2.5Air polluted degree: level

3 Nominal parameter

 

 

 

 

Technical parameter

No.	Item		Unit	Data
1	Rated voltage		KV	72.5
2	Rated current		A	3150
3	Rated frequency		HZ	50/60Hz
4	First pole to clear factor			1.5
5	Rated short circuit breaking current		KA	31.5
6	Rated short-circuit current (peak)		KA	100
7	Rated short-circuit withstand current		KA	40
8	Rated power frequency withstand voltage(1min)	Phase to earth	KV	K·230
		Phase to phase		K·(230+70)
9	Rated lightning impulse withstand voltage	Phase to earth	KV	K·550
		Phase to phase		K·(550+103)
10	Rated peak withstand current		KA	100
11	Rated out of step current		KA	10
12	Near fault current		KA	90%1K
13	Electrical life of rated short circuit breaking current		times	20
14	Rated short circuit duration		s	4
15	Rated line charging close current		A	50
16	Rated operation sequence			O-0.3s-CO-180s-CO
17	Main circuit resistance		μΩ	≤35
18	Rated SF6 gas pressure		MPa	0.5
19	SF6 gas leakage rate		ppm	≤0.5
20	Moisture content of SF6 gas (V/V)			≤150
21	Mechanical life		times	6000
22	Electric distance	Phase to earth	mm	3906/3150
		Phase to phase		3906/3150
23	Each filled with SF6 gas quality		kg	6
24	Quality of each circuit breaker		kg	1200

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