12kV Pneumatic Type Load Break Switch

1. It combines LBS, earthing switch and fuse on one frame. It is compact and with small volume, easy to installation. 2. Direct-acting isolating fracture, high dynamic and thermal stable current; it can be operated at one time due to unique linkage operating procedures. 3. With insulation cover of fixed contact, it isolates ring main unit on structure, saves isolation plate between phases and gaps, can preventing arc short circuit in switchgear 4. With unique shutter structure, when LBS opening, earthing switch closed and shutter closed, with good protective performance. 5. Load break switch, earthing switch and fuse are in accordance with “5 prevention” mechanical interlock, which can prevent misoperation and is safe and reliable. 6. Charged energy by spring operating mechanism, can closing and opening by electrical and by manual.

Product Details

FKN12A-12D/T630-20 Type Indoor AC High-voltage Pneumatic Type Load Break Switch

 

General Description

FZN12A-12D/T630-20 type indoor AC high-voltage pneumatic type load break switch is three phases AC 50Hz, rated voltage of 12kV. It is used for CO load current, closed-loop current, no load transformer and cable charging current, making short circuit current. With earthing switch, the switch can withstand making short circuit current.

The operating mechanism can be operated by electrical or manual, which is easy to realize remote control.

General Description

FZRN12A-12D/T125-31.5 type indoor AC high-voltage pneumatic type load break switch-fuse composite apparatus is a electrical equipment that combining load break switch and HV current-limiting fuse. Combining any overcurrent between breaking working current and short circuit current; load break switch breaks working current, fuse breaks short circuit current; through striker, the fuse make load break switch to open.

With earthing switch, the switch can withstand making short circuit current.

The operating mechanism can be operated by electrical or manual, which is easy to realize remote control.

Main application

FZN12A-12D type indoor AC high-voltage pneumatic type load break switch is suitable to 12kV and below three-phase power distribution system, as control and protection for transformer, cable and overhead line. It is particularly suitable for terminal substation and box-type substation, and suitable for ring main unit, dual radiation power unit.

FZN12A-12D type pneumatic type load break switch can open and close load current and overload current.

FZN12A-12D type pneumatic type load break switch-fuse composite apparatus can open and close load current, overload current and breaking circuit short circuit current.

Applying ambient conditions

a. Ambient temperature: -25℃~+40℃ 

b.The height above sea level1000m.

c.Relative humidity: the average humidity of a day should be no more than 95%; the average humidity of a month should be no more than 90%.

d. Earthquake intensity: no more than 8 degree.

e.It should be installed in the place without dust, fire, chemical erosion, explosion, vapor and salt spray.

g. Pollution grade: II

Structural features

1. It combines LBS, earthing switch and fuse on one frame. It is compact and with small volume, easy to installation.

2. Direct-acting isolating fracture, high dynamic and thermal stable current;  it can be operated at one time due to unique linkage operating procedures.

3. With insulation cover of fixed contact, it isolates ring main unit on structure, saves isolation plate between phases and gaps, can preventing arc short circuit in switchgear

4. With unique shutter structure, when LBS opening, earthing switch closed and shutter closed, with good protective performance.

5. Load break switch, earthing switch and fuse are in accordance with “5 prevention” mechanical interlock, which can prevent misoperation and is safe and reliable.

6. Charged energy by spring operating mechanism, can closing and opening by electrical and by manual.

Main technical specification

Table 1

S.N.

Name

Unit

Data

FZN25-12D/T630-20

FZRN25-12D/T200-31.5

1

Rated voltage

kV

12

2

Rated frequency

Hz

50

3

Rated current

A

630

125

4

1min power frequency withstand voltage

kV

between phases and to ground 42between gaps 48.

5

Lightning impulse withstand voltage (peak)

kV

between phases and to ground 75between gaps 85

6

Rated short time withstand current (thermal stability current)

LBS

kA


-

ES

kA

20

7

Rated short circuit duration

LBS

s

4

-

ES

s

2

8

Rated short circuit making current

kA

50

-

9

Rated active load breaking current

A

630

-

10

Rated closed loop breaking current

A

630

-


5% active load breaking current


31.5

-

11

Rated cable charging breaking current

A

10

-

12

Rated breaking no load transformer capacity

KVA

1250

13

Rated short circuit breaking current (current-limiting fuse)

kA

-

31.5

14

Rated transfer current

A

-

1200

15

Fuse striker output energy

J

-

1+0.5

16

Mechanical life

times

20000

Table 2

S.N.

Name

Unit

Data

FZN25-12D/T630-20

FZRN25-12D/T200-31.5

1

Gap clearance

mm

≥175

2

Phase center distance

mm

210±2

3

Air distance between phases

mm

≥125

4

Stroke

mm

210±4

5

Overstroke

mm

≥40

6

Inherent opening time of shunt release

ms

40~65

9

Main circuit resistance

μΩ

≤130

 

Thank you for your interest to our products. 

For more information please kindly email us at market@joyelectric-china.com.


Joyelectric International is a professional China 12kV Pneumatic Type Load Break Switch distributor and agent among those well-known such manufacturers and suppliers, welcome to order 12kV Pneumatic Type Load Break Switch products from our factory and company.
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