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FZRN61 load break switch with disconnect switch and earth switch

Short Description:


Product Detail

Product Tags

Overview

• FZN61-12DG/630-20 and FZN61-12DG/1250-25 indoor AC high voltage miniaturized vacuum load break switches are three-phase high voltage switch equipment with rated voltage of 12kV and rated frequency of 50Hz, are used to switch load currents, closed loop current, no-load transformer and cable charging current, and make short circuit current. The three-position miniaturized vacuum load break switch equipped with an disconnect switch at the top and a earth switch at the bottom can withstand short-circuit current.

• FZRN61-12DG/200-31.5 AC high voltage miniaturized vacuum load break switch-fuse combination unit is indoor high voltage switch equipment, combines of FZRN61-12DG miniaturized load break switch and S□LAJ-12 (XRNT□-10) high voltage current-limiting fuse. It can break any current up to the short-circuit current; the load break switch breaks the working current, the fuse breaks the current, and the joint breaks any current between the working current and the full short-circuit current. At the same time, the fuse opens the load break switch through its strike.

 

Type Description

 

Use Conditions

• Ambient air temperature: -30℃~+40℃;

• Altitude: ≤1000m; above 3000m can be customized;

• Relative humidity: daily average ≤95%, monthly average ≤90%;

• Earthquake intensity: ≤8 degree;

• Places without danger of fire and explosion, chemical corrosion and severe vibration;

• Pollution degree: II.

 

Technical Parameters and Performance

NO.

Item

Unit

Vacuum load break switch

Vacuum load break switch-fuse combination unit FZRN61-12(D)/T200-31.5

FZN61-12(D)/Т630-20

FZN61-12(D)/Т1250-25

1

Rated voltage

kV

12

2

Rated frequency

Hz

50

3

Rated current

A

630

1250

200

4

Rated short time withstand current

kA

20, 25

5

Rated peak withstand current

kA

50, 63

6

Rated short circuit making current

kA

50

63

80

7

Rated active load breaking current

A

1250

1250

8

Rated closed loop breaking current

A

1250

1250

9

Breaking no-load transformer

kVA

2000

10

Ground fault current

A

20

11

Line and cable charging current under ground fault conditions

A

20

12

Rated short-circuit breaking current

kA

 

31.5/50 (depends on the fuse)

13

Rated transfer current

A

3150

14

Fixed opening time

ms

45

15

Power frequency withstand voltage (1min)

kV

Phase-to-phase, phase-to-earth, across vacuum open contacts: 42, across disconnect open contacts: 48

16

Lightning impulse withstand voltage

kV

Phase-to-phase, phase-to-earth, across vacuum open contacts: 75, across disconnect open contacts: 85

17

Mechanical life

times

>10000

 

Product Assembly Analysis Drawing

1. upper outlet   2. disconnect switch   3. insulating base    4. flexible connection   5. upper fuse holder

6. fuse   7. lower fuse holder   8. trip plate   9. lower outlet   10. metal frame   11. vacuum interrupter

12. spring mechanism   13. operating panel    14. earth switch

Product Structure Introduction

• The vacuum disconnect load break switch is a modular product; the frame structure: compact structure, integrated disconnect switch, vacuum load break switch, fuse, earth switch as a whole high-performance high voltage electrical products.

• Small size: width in the open and close state: the width of the vacuum load break switch ≤299mm.

• High parameters: the rated current of the vacuum load break switch is up to 1250A; the rated current of the switch-fuse combination unit is up to 200A, which can protect a 2000kVA transformer.

• The incoming line disconnect switch is linked with the earth switch. After the earth switch is opened, the incoming line disconnect switch will be closed in the same action.

• Rotary disconnect switch with visible fracture after opening.

• There is a mechanical interlock between the vacuum disconnect load break switch and the disconnect (earth) switch to prevent misoperation. Ensure that the vacuum load break switch can be closed after the disconnect switch is closed; the disconnect switch can be opened only after the vacuum load break switch is opened.

• The load break switch can be equipped with an electric operating mechanism, which is electric and manual, can realize remote control.

• Optional auxiliary switch, shunt and overcurrent release.

• The opening and closing speed of the vacuum load break switch is not affected by the manual operation.

• The anti-misoperation mechanism meets the requirements of the “five preventions” of the complete set of high voltage equipment.


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