Ru-Lena Ind. (Holding) Co., Ltd.
Main products:fuse cut out parts,polymer arrester,arrestor disc,ACSR,galvanized steel cable
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Contact Us
  • Contact Person : Mr. Han Daniel
  • Company Name : Ru-Lena Ind. (Holding) Co., Ltd.
  • Tel : 86-0411-39852517
  • Fax : 86-0411-39852510
  • Address : Liaoning,Dalian,1302-1305 Tower B, The Manhattan Tower, No. 101 Youhao Road, Zhongshan Dist.
  • Country/Region : China
  • Zip : 116001

LW--72.5/T3150-31.5

LW--72.5/T3150-31.5
Product Detailed
Related Categories:Circuit Breakers
Related Product Searches:LW--72.5/T3150-31.5,High Quality,HV circuit breaker
The type LW-72.5/T3150-31.5 outdoor high voltage SF6 circuit breaker is equipment with CBT-I spring operating mechanism for 3-

The circuit breaker take on self-energized arc control system , which has the features of simple construction, small volume, small needed operation power, good stability, easy installation, low operation noise and so on. It is the new type high voltage SF6 circuit breaker manufactured by our company.

2.Main Features

Type LW--72.5SF circuit breaker take on self-energized arc control device, which applies the blockage effect of the arc more effectively, reasonable pressure ratio and speed characteristic, reduces the diameter of the air cylinder, lighten the weight of arc device, so that make thus the operation power of the mechanism decline apparently.

The 3 stage circuit breaker installate on the same crossbeam, the three pole gang operation adopt duplex pull rod construction, which make the pull rod only bear the pull force and the stress is more even, and the simultaneity between phases is good, is the advantage construction among switchgear equipments. The arm and drive shat are connected by involute spline, which make the moment of force bigger.

CTB-1 spring operation mechanism has strong operation force, so it could afford reasonable opening and closing speed, and the envelope of the mechanism is make of corrosion resistant steel which has the features of firm, aesthetic and high protect level.

3.Main Technical data

 

Number

Item

Unit

Data

Importance level

1

Rated voltage

KV

72.5

 

2

Rated insulation level

KV

Fig.2

 

3

Rated frequency

Hz

50

 

4

Rated current

A

3150

 

5

Rated short circuit breaking current

KA

31.5

 

6

Rated short time withstand current

KA

31.5

 

7

Rated peak withstand current

KA

80

 

8

Rated duration of short circuit

S

4

 

9

Rated short circuit making current(peak)

KA

80

 

10

Rated short line fault breaking current

KA

L90:22.5

L90:28.35

 

L75:18.75

L75:23.63

11

Rated line charging breaking current

A

10

 

12

Rated out of phase breaking current

KA

7.9

 

13

First-pole-to-clear factor

 

1.5

 

14

SF6 gas pressure(20°)

MPa

Fig,3

 

15

Mechanical characteristic

 

Fig,4

 

16

Rated operating sequence

 

O-0.3s-CO-180-CO

 

17

Operation mechanism main technical data

 

Fig.5

 

18

Main loop resistance

≤50

[A]

19

Permissible load on wiring terminal

Horizontal

N

750

 

transverse

N

500

 

vertical

N

750

 

20

Mechanical duration

times

10000

[B]

21

SF6 gas leakage per year

 

≤0.5%

[A]

22

SF6 gas vapor content(V/V)

PPm

≤150

[B]

23

3-pole circuit breaker total weight(include mechanism)

Kg

1000

 

24

SF6 gas weight

Kg

4

 

25

External dimensions

mm

2800×440×4296

 

LW--72.5/T3150-31.5



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