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VTZ/R-24
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Side mounting type indoor High Voltage Vacuum Circuit Breaker

VTZ/R-24


VTZR-24.jpg


1General  Description

VTZ/R-24 Side mounting Indoor High Voltage Vacuum Circuit Breaker is widely used for 3phase AC 50(60)HZ and 3.6-24KV indoor device,which is used for protecting and controlling electrical equipment in fields of industry&mining enterprise. power plants and substation.

2.Applying  conditions:

Ambient temperature;-10----+40

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

Seismic intensity ≤8

Saturated vapor pressuredaily average ≤2.2kPamonthly average≤1.8kPa

Altitude:≤1000m;(Not including special requirement

Service environmentshould be avoided fire, explosion risk, serious pollution, chemical corrosion and violent vibration

3.Structural characteristics:

1.Adopt module operating mechanism,integrated stored energy hand shank and reasonable whole structure.

2. Use module design to easy dis-assemble and replace broken parts.

3.Adopt Solid-closure technology in primary circuit to improve insulation and achieve free maintenance.

4.Long life,The circuit breaker meet M2 &E2.

5.Own excellent breaking property to make and break  inductance and capacitance.

6.suitable for KYN-28and XGN-12 and replace VD4-12 and HVX-12.

7.Flexible main circuit connection way to meet different requirement of switchgear .

4.Technical specification

No.

Item

Unit

Data

1

Rated voltage

kV

24

2

Rated power frequency withstand voltage/1min

65

3

Rated lighting impulse withstand voltage

125

4

Rated frequency

Hz

50/60

5

Rated current

A

630

1250

6

Rated short circuit breaking current

kA

20


25

25

31.5

31.5

7

Rated withstand current(peak)

kA

50


63

63

80

80

8

Circuit resistance of each phase

μΩ

≤50

≤45

5.Mechanical property

No.

Item

Unit

Data

1

Clearance between open contacts

mm

12 ± 1

2

Over-travel

3.5 ± 0.5

3

Bounce time of contact closed

ms

≤ 2

4

Non simultaneity of 3 phase contact opened&closed

≤ 2

5

Opening time

20~50

6

Closing time

3070

7

Average opening speed   

m/s

1.11.6

8

Average closing speed

0.5~1.0

6.overall drawing




7.Secondary connection diagram







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