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MLW8A-40.5-SF6-Circuit-Breaker

SF6 Circuit Breaker MLW8A-40.5

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Description

 

MLW8A-40.5 type outdoor high-pressure sulfur hexafluoride circuit breaker is three-pole ac 50 Hz, outdoor high voltage switch equipment, applicable to 40.5 kV power transmission and distribution system control and protection, can also be used to contact circuit breaker and movable capacitor group.

Standard: IEC 62271-100.

Certification: ISO9001-2000, CCC

Operation: Energy-storage Type

Installation: Fixed

Arc-extinguishing Medium: SF6

Speed: Normal Type Circuit Breaker

HS Code: 85353000

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Parameters

 

No. Name Value
1 Rated voltage(KV) 40.5
2 Rated current(A) 1600/2000
3 Rated insulating level Power frequency withstand voltage (KV)/1min 95
Thunder impulse withstand voltage (KV) 185
4 Rated short-circuit breaking current (KV) 31.5/40
5 Rated out-of-phase breaking current (KA) 7.9/10
6 Breaking current of earth fault in different phase(KA) 27.4/34.8
7 Rated breaking current of sigle capacitor bank(A) 400
8 Rated operating sequence O-0.3S-CO-180S-CO
9 Rated SF6 gas pressure(Mpa) 0.55
10 Switch-off time(on rated voltage)(ms) 30 ≤t ≤40
11 Switch-on time(on rated voltage)(ms) 60 ≤t ≤80
12 Rated short-circuit switch current(peak)(KA) 80/100
13 Rated short-cirduration time(s) 4
14 Rated short time withstand current (KA) 31.5/40
15 Rated peak value withstand current(KA) 80/100
16 Mechanical life test(time) 6000
17 Cumulative breaking times of rated short-circuit breaking current 31.5KA/40KA(time) 20/16
18 Cumulative breaking times of rated current(time) 2000
19 Annual leakage rate of SF6(%) ≤0.5
20 Water content of SF6(V/V)(PPm) ≤150
21 Outer insulating leakage ratio distance(mm/KV) ≤25 , ≤31
22 Weight of the breaker(kg) 1000

 

Working Condition of MLW8A-40.5

  • Sunlight: 1000W/m
  • Relative humidity: Daily average value is 95%
  • Monthly average value is 90%
  • Seismic: Horizontal acceleration: 0.250g
  • Vertical acceleration: 0.125g
  • Pollution level: (25mm/kV)
  • Thickness of ice covering: 10mm (when wind speed 15m/s)
  • Protection degree: IP5XW
  • Max wind velocity 34m/s
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Solutions

 

Application: three-phase AC 50Hz outdoor HV electrical apparatus with CT14 spring operating mechanism, for control and protection of 40.5kV power system as well as communicating with circuit breaker. Current transformer inside as well for measuring and protection.

MLW8A-40.5-1

Dimensions:

MLW8A-40.5-2

Please state the following when placing the order:

  1. Title, model/specification of the product;
  2. Rated voltage, rated current and rated control voltage;
  3. Quantity of product and spare parts;
  4. Other special requirements.

You can asking Data Sheet List before order by e-mail: power@mettz.com or mettzpower@gmail.com

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