ZN63(VBM7)-12 indoor high-voltage vacuum circuit breaker with side mounting
The ZN63(VBM7)-12 type side-mounted vacuum circuit breaker is an indoor high-voltage switchgear suitable for three-phase power systems with a rated voltage of 12 kV and a frequency of 50 Hz. It is used as a protective and control device. Due to the special advantages of vacuum circuit breakers, it is particularly suitable for places requiring frequent operation under rated current or multiple breaking of short-circuit current.
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ZN63(VBM7)-12 indoor high-voltage vacuum circuit breaker with side mounting
- Product details
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- Commodity name: ZN63(VBM7)-12 indoor high-voltage vacuum circuit breaker with side mounting
The ZN63(VBM7)-12 type side-mounted vacuum circuit breaker is an indoor high-voltage switchgear suitable for three-phase power systems with a rated voltage of 12 kV and a frequency of 50 Hz. It is used as a protective and control device. Due to the special advantages of vacuum circuit breakers, it is particularly suitable for places requiring frequent operation under rated current or multiple breaking of short-circuit current.
Overview
The ZN63(VBM7)-12 side-mounted vacuum circuit breaker is an indoor high-voltage switchgear suitable for three-phase power systems with a rated voltage of 12 kV and a frequency of 50 Hz. It is used as a protective and control device. Due to the special advantages of vacuum circuit breakers, it is particularly suitable for places requiring frequent operation under rated current or multiple breaking of short-circuit current.
The ZN63(VBM7)-12 side-mounted vacuum circuit breaker adopts a fixed installation and is mainly used for fixed switchgear. This circuit breaker can be used independently or in ring network power supply, box-type transformers, or various non-standard power supply systems.
Main Technical Parameters
Serial Number
Name
Unit
Data
1
Rated Voltage
KV
12
2
Rated Current
A
630-1250
1250
1250
3
Rated Short-Circuit Breaking Current
KA
20
25
31.5
4
Rated Short-Circuit Closing Current
KA
50
63
80
5
Rated Peak Withstand Current
KA
50
63
80
6
4S Rated Short-Circuit Withstand Current
KA
20
25
31.5
7
Rated Insulation
Level
1min Power Frequency Withstand Voltage
KV
42(48 at the break)
Lightning Impulse Withstand Voltage (Peak)
75(65 at the break)
8
Rated Operating Sequence
Open-0.3S-Close-Open-180S-Close-Open
9
Mechanical Life
Times
10000
10
Number of Rated Short-Circuit Breaking Current Operations
Times
50
11
Operating Mechanism Rated Closing Voltage (DC)
V
AC/DC220,110
12
Operating Mechanism Rated Opening Voltage (DC)
V
AC/DC220,110
13
Contact Gap
mm
11±1
14
Overtravel (Contact Spring Compression Length)
mm
3.5±0.5
15
Three-Phase Opening and Closing Bounce Time
ms
≤2
16
Contact Closing Bounce Time
ms
≤2
17
Average Opening Speed
m/s
1.1±0.2
18
Average Closing Speed
m/s
0.6±0.2
19
Opening
Under Maximum Operating Voltage
S
≤0.05
Time
Under Minimum Operating Voltage
≤0.08
20
Closing Time
s
0.1
21
Allowable Cumulative Wear Thickness of Moving and Static Contacts
mm
3
Overall Installation Dimensions
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