66KV SF6 Ckt Breaker For Three Phase AC 50HZ Power System

Basic Information
Place of Origin: XIAN
Brand Name: XG
Certification: ISO,CCC
Model Number: LW8...
Minimum Order Quantity: 1 STES
Price: USD300-1000
Packaging Details: WOODEN CASE
Delivery Time: 7-15 DAYS
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 2000 SETS
Detail Information
Frequency: 50/60Hz Poles Number: 3
Phase: 3 Medium: SF6
Material: Galvanized Sheet And Accessories Certificate: ISO14001 BS OHSAS18001
Standard: IEC/GB
High Light:

66KV SF6 Ckt Breaker


IEC SF6 Ckt Breaker


66KV gas insulated circuit breaker

Product Description

66KV SF6 circuit breaker

Product Description


66KV SF6 circuit breaker

66KV SF6 circuit breaker



66KV SF6 circuit breaker66KV SF6 circuit breaker

1. Environmental Condition

  • Ambient temperature:-40℃~+40℃
  • Altitude:≤2000m
  • Wind pressure:≤700Pa
  • Daily temperature differenc:25℃
  • Icing thickness:≤10mm
  • Air pollution level:Ⅲ

2. Technical Data


No. Item Unit Data
1 Rated voltage KV 72.5
2 Rated current A 3150
3 Rated frequency HZ 50
4 First pole to clear factor   1.5
5 Rated short circuit breaking current KA 40
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 31.5
16 Rated operation sequence   O-0.3s-CO-180s-CO35
17 Main circuit resistance μΩ ≤35
18 Rated SF6 gas pressure MPa 0.6
19 SF6 gas leakage rate ppm ≤0.55
20 Moisture content of SF6 gas (V/V)   ≤150
21 Mechanical life times 10000
22 Electric distance Phase to earth mm 3906/3150
Phase to phase 3906/3150
23 Each filled with SF6 gas quality kg 8
24 Quality of each circuit breaker kg 1700


3. Application


Self-energy type SF6 circuit breaker LW36B-66 is outdoor unit which is developed by our company and Xi'an High Voltage Apparatus Research Institute with sulfur hexafluoride gas as insulation and arc extinguishing medium and principle of single variable pressure cabinet type arc extinguishing. The product is suitable for 66KV three-phase AC 50HZ power system, which is used for points and load current , overload current and short circuit current.



  • GB1984
  • GB/T28001-2011 idt OHSAS18001:2007
  • GB/T24001-2004 idt ISO14001:2004

5. Features

a) Reliable breaking performance

b) Reliable mechanical operating performance:high operational reliability, mechanical life up to more than 10000 time

c) Reliable insulation

d) Reliable sealing performance

e) Strict process of product components




Company Information

66KV SF6 circuit breaker


ISO 9001:2008 & National CCC certification


66KV SF6 circuit breaker

Packaging & Shipping
66KV SF6 circuit breaker
Frequently Asked Question

Are you manufacturer or trading company?

Xi'an XIGAO Group is a specialized manufacturer with over 20years production experience, and have our own

trade mark "XIGAO GROUP".

How to pay sample and express charges?
For samples charge, you could pay through West Union or Transfer to our company's account. If you have a

international express account, we could send samples to you by freight collected. Please kindly note we will

charge a reasonable cost of samples.

What is your terms of payment ?
We accept West Union, T/T, irrevocable L/C at sight. Prefer T/T 30% deposit before production, the balance

against copy of B/L.

How do you control the quality ?
Professional QC team comply with TQM insure you the quality. Each step is in compliance to the standards,At

the same time ,we will take photos or shoot video for you.

What about lead or shipping time?
The lead time depends on the quantity you ordered, generally within 20-30 days upon receipt of advance payment.

Contact Details

Phone Number : +8613319220197

WhatsApp : +8613319220197