Mobile menu

LW8-40.5 SF6 Circuit Breaker

LW8-40.5 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. LW8-40.5 type circuit breaker with CT14 type spring operation mechanism.

Accord with national standard GB1984-89 AC high voltage circuit breaker, and the international electro-technical commission standard IEC56 publications of high voltage circuit breaker.

Structure: ELCB

Certification: ISO9001-2000, CCC

Operation: Energy-storage Type

Installation: Fixed

Arc-extinguishing Medium: SF6

Speed: Normal Type Circuit Breaker

HS Code: 85353000

Specification:

  1. Outdoor type,
  2. SF6 circuit breaker, 
  3. Dirtness resistance,
  4. Spring mechanism.

Feature advantages

  1. open circuit performance is good, short arc time and current life is long, continuous open 31.5 kA short circuit current at rated voltage 21 times don't repair, do not replace the sulfur hexafluoride gas;
  2. insulation and reliable;
  3. high mechanical reliability, frequent operation;
  4. movable capacitor current is 400 a group without renewed;
  5. simple structure, small volume, no maintenance cycle is long.

LW8A-40.5(W)T2000-31.5 outdoor type SF6 breaker finds its universal range of applications for the three-phases electrical system with alternating current 50HZ and rated voltage 40.5kv. It is used for controlling and protecting the electrical system and measuring the current transformers. 

Parameter

unit

data

Rated voltage

kV

40.5

Lightning impulse withstand voltage

kV

185 / 215

Power frequency withstand voltage(1min)

kV

95 / 118

Rated current

A

2000

Mechanical life

time

3000

Sf6 gas rated pressure(20°C)

MPa

0.45

Closure pressure(20°C)

MPa

0.40

Rated short circuit breaking current

kA

31.5

Rated short circuit making current(peak)

kA

80

Rated short circuit withstand current

kA

31.5

Rated peak withstand current

kA

80

Rated out-of-phase breaking current
 

kA

7.9

Rated duration of short-circuit
 

s

4

Closing time
(Under rated operating voltage)

ms

≤100

Opening time
(Under rated operating voltage)

ms

≤60

Close-open time
 

ms

≥130

Rated operating sequence
 

 

open-0.3s-close-open-180s-close-open

The rated current opening and closing a single capacitor group
 

A

400

Accumulative breaking times of rated short circuit on power flow

time

21

yearly gas leakage rate
 

%

≤0.3

Sf6 gas water content(20°C)

ppm(v/v)

≤150

Working conditions:

  • 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: (25 mm/kV)
  • Thickness of ice covering: 10 mm
  • Protection degree: IP5XW
  • Max wind velocity: 34m/s
  • Note: Customized products are available.

You can ask Data Sheet List for this product before order: This email address is being protected from spambots. You need JavaScript enabled to view it.or This email address is being protected from spambots. You need JavaScript enabled to view it.