12kV Vacuum Load Break Switch and Vacuum LBS-Fuse Composite Apparatus

FZN25-12D/T630-20 Type Indoor AC High-voltage Vacuum Load Break Switch FZRN25-12D/T200-31.5 Type Indoor AC High-voltage Vacuum Load Break Switch-Fuse Composite Apparatus General description FZN25-12D/T630-20 type indoor AC high-voltage vacuum load break switch is three phases AC 50Hz, rated...

Product Details

FZN25-12D/T630-20 Type Indoor AC High-voltage Vacuum Load Break Switch

FZRN25-12D/T200-31.5 Type Indoor AC High-voltage Vacuum Load Break Switch-Fuse Composite Apparatus 

General description

FZN25-12D/T630-20 type indoor AC high-voltage vacuum load break switch is three phases AC 50Hz, rated voltage of 12kV. It can be used as protection and control of electric equipments for power transmission and distribution of factories , mines and enterprises. It can be used for CO load current, closed-loop current, no load transformer and cable charging current.

It can be equipped with earthing switch with capability of making short circuit current.

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

FZRN25-12D/T200-31.5 type indoor AC high-voltage vacuum load break switch-fuse composite apparatus is three phases AC 50Hz, rated voltage of 12kV. It can be used as load control and short circuit protection for power transmission and distribution of factories , mines and enterprises.

It can be equipped with earthing switch with capability of making short circuit current.

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

Main application

FZN25-12D type indoor AC high-voltage vacuum load break switch and FZRN25-12D type indoor AC high-voltage vacuum load break switch-fuse composite apparatus are control and protection devices for three phases AC 50Hz, 12kV power distribution system. They are widely used for factories , mines, enterprises and buildings, etc. For protection of electrical equipment such as transformer, composite apparatus is more reliable than circuit breaker. It is particularly suitable for ring main unit, dual radiation power unit and box-type substation.

Applying ambient conditions

a. Ambient temperature: -25℃~+40℃ (Transportation and storage at -30 are allowable)

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.

f. No constant vibration

g. Pollution grade: II

Structural features

1. The product uses vacuum interrupter. Its performance is stable and reliable, with long electrical life, high breaking capability, strong making/breaking ability and easy to be operation and maintenance.

2. It combines switch body and operating mechanism, which integrates disconnector, load break switch and earthing switch. It is compact and with small volume.

3. Tandem arrangement of direct-acting isolating fracture and vacuum interrupter, high dynamic and thermal stable current;  it can be operated at one time due to unique linkage operating procedures.

4. Structure of cone fixed contact, insulation cover and shutter can separate busbar and load break switch unit completely.

5. Vacuum load break switch, earthing switch, shutter, switchgear door 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.

7. Operating voltage of closing and opening can be DC and AC.

8. The normal type is operated by left and right side operating mechanism, but can with front operating mechanism as user’s requirement.

9. Standard: GB3804, GB16926.

Main technical specification

Main technical specification of FZN25-12D type indoor AC high-voltage vacuum load break switch and FZRN25-12D type indoor AC high-voltage vacuum load break switch-fuse composite apparatus

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

≤200

4

1min power frequency withstand voltage

kV

between phases and to ground 42; between gaps 48.

5

Lightning impulse withstand voltage (peak)

kV

between phases and to ground 75; between gaps 85

6

Rated short time withstand current (thermal stability current)

kA

20

-

7

Rated short circuit duration

s

4

-

8

Rated peak withstand current (Dynamic stability current)

kA

50

-

9

Rated active load breaking current

A

630

-

10

Rated closed loop breaking current

A

630

-

11

Rated cable charging breaking current

A

10

-

12

Rated breaking no load transformer capacity

KVA

1600

13

Rated short circuit breaking current

kA

-

31.5

14

Rated transfer current

A

-

2000

15

Fuse striker output energy

J

-

1+0.5

16

Rated short circuit making current

kA

50

(prospective peak value)

17

Rated short time withstand current of earthing switch (thermal stability current)

kA

20

18

Rated short circuit duration of earthing switch

s

2

19

Rated voltage of auxiliary circuit

V

AC/DC220, AC/DC110

20

Mechanical life

times

10000

Mechanical parameters of FZN25-12D type indoor AC high-voltage vacuum load break switch and FZRN25-12D type indoor AC high-voltage vacuum load break switch-fuse composite apparatus

S.N.

Name

Unit

Data

FZN25-12D/T630-20

FZRN25-12D/T200-31.5

1

Air distance between electrified bodies and to ground

mm

≥125

2

Depth of conductive cylinder inserting into fixed contact seat

mm

≮18

3

Vacuum interrupter clearance

mm

6+10

4

Spring compression of vacuum interrupter’s contact pressure

mm

2+10

5

Average closing speed of vacuum interrupter

m/s

0.6±0.2

6

Average opening speed of vacuum interrupter

m/s

0.9±0.2

7

Closing bounce time

ms

≤2

8

Non-synchronism of three-phase opening and closing

ms

≤3

9

Main circuit resistance

μΩ

≤150

≤300

10

Max. torque of manual operation

n.m

≤160

11

Opening time by fuse triggered

m/s

-

30-40

12

Opening time by tripper triggered

m/s

40-45


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