Vacuum Circuit Breaker ZN63A(VS1)-12kV

1.It adopts VS1 operating mechanism, integrated design of operating mechanism and circuit breaker
2.Careful workmanship, safe and durable.
3.Short delivery time
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Product Details

VS1 indoor high-voltage vacuum circuit breaker is an indoor switchgear with a rated voltage of 12kV and AC 50 / 60Hz. It adopts an integrated design of the operating mechanism and the circuit breaker body. It can be equipped with a dedicated propulsion mechanism to form a handcart unit and KYN28A-12 type switch cabinet is used together, and can also be used as a fixed unit and equipped with corresponding mechanical interlocks, which is suitable for fixed cabinets such as XGN2.

Products comply with GB1984 "High Voltage AC Circuit Breaker", JB / T 3855 "High Voltage AC Vacuum Circuit Breaker", DL / T 403 "Ordering Technical Conditions for 12kV ~ 40.5kV High Voltage Vacuum Circuit Breaker" and IEC62271-100 "High Voltage AC Circuit Breaker", etc. Provision of standards.

Other series of special handcarts supporting KYN28 switch cabinets include isolation, fuses and arrester cars.


Normal use conditions

1. Ambient temperature: Max. Temperature: +40℃, Min. Temperature: -15℃, and average temperature daily should be no more than 35℃

2. Relative humidity: average relative humidity daily: ≤95%, average relative humidity monthly: ≤90%; Average vapour pressure daily: ≤2.2kPa, average vapour pressure monthly: ≤1.8kPa

3. Altitude above sea level: no more than 3000m

4. Earthquake intensity: not exceed 8 degrees

5. It should be installed in the places without fire, explosion, serious filth, and chemical erosion and violent vibration.


Main technical parameters of VS1

Item

Unit

Value

Rated voltage

kV

12

Rated frequency

Hz

50/60

Rated power frequency withstand voltage

kV

42

Rated lightning impulse withstand voltage(peak)

kV

75

Rated current

A

630

1250

1600

2000

2500

3150

4000

Rated short circuit opening current

Rated short time withstand stable current

4s rated short time withstand current

kA

20

20






25

25







31.5

31.5

31.5

31.5




40

40

40

40

40

40







50

Rated short circuit closing current (peak)

Rated peak withstand current

Rated dynamic and stable current

kA

50

50






63

63







80

80

80

80




100

100

100

100

100

100







125

Breaking times of short circuit breaking current

times

50(≤31.5kA)/ 30(40kA)/ 12(50kA)

Rated dynamic and stable time

s

4

Rated operating sequence


O-0.3s-CO-180s-CO

O-180s-CO-180s-CO(≥40kA)

Mechanical life

times

20000/10000≥(40kA)

Rated breaking current of single or back to back capacitor bank

A

630/400

Note: (1)The switchgear should be supplied with compulsive cold wind when the rated current is 4000kA

 

Mechanical feature parameters of VCB after installation and adjustment

Item

Unit

Value

Contact clearance

mm

9±1

Overtravel of contacts

mm

3.5±0.5

Center distance between poles

mm

210(150)±1.5/275±1.5

Out of simultaneity of CO operations of three poles

ms

≤2

Contact bouncing duration at closing operation

ms

≤2/≤3(≥40kA)

Average opening speed

m/s

1.1±0.2

Average closing speed

m/s

0.6±0.2

Opening time

ms

20-50

Closing time

ms

35-70

Main circuit resistance

μΩ

≤60/45(630A)

≤50/40(1250~1600A)

≤35/30(2000A)

≤25(≥2500A)

Allowed wear thickness of contact

mm

≤3

 

Parameters of energy storage motor

The operating mechanism uses a permanent magnet single-phase DC motor and is equipped with a special reducer; the gears in the reducer are sealed in a grease-filled box, and the output speed is 17r/min.

Rated voltage(V)

Rated output power

Normal working voltage range

Energy storage time at rated voltage(s)

DC110  DC220

75/100*

85%~110% rated voltage

≤15

 

Technical parameters of closing/opening coil


Closing electromagnet

Opening electromagnet

Latching electromagnet

Anti-jump relay

Rated voltage(V)

DC220

DC110

DC220

DC110

DC220

DC110

DC220

DC110

Coil power(W)

244/323

303

244/323

303

4.0

2.7

1.0

Rated current(A)

1.11/1.47

2.75

1.11/1.47

2.75

18mA

25mA

9.1mA

Operating voltage range

80%~110% of rated voltage

65%~120% of rated voltage

80%~110% of rated voltage



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