summarize
ZW7-40.5 series outdoor high-voltage vacuum circuit breaker is a three-phase AC 50Hz outdoor high-voltage electrical equipment with a rated voltage of 40.5kV. Attached spring operating mechanism or electromagnetic operating mechanism, it can be remotely electric opening and closing, or it can be manually stored on the spot, and manually opened and closed. The design performance meets the requirements of the national standard of GB1984-89 “AC High Voltage Circuit Breaker”, and meets the requirements of the International Electrotechnical Commission standard of IEC-56 “AC High Voltage Circuit Breaker”. ZW7-40.5 series outdoor high-voltage vacuum circuit breaker is mainly used for the control and protection of outdoor 40.5kV power transmission and transformation system, and is also suitable for the normal operation and short-circuit protection of urban and rural power distribution networks and industrial and mining enterprises. The overall structure of the product is a pillar type of porcelain bottle, the upper porcelain bottle is equipped with a vacuum interrupter, and the lower porcelain bottle is a pillar porcelain bottle. It is suitable for places with frequent operation. And it has the characteristics of good sealing, anti-aging, high pressure resistance, non-combustion, no explosion, long service life, easy installation and maintenance, etc.
The circuit breaker structure is a porcelain bottle pillar type, the upper porcelain bottle is an arc extinguishing chamber porcelain bottle, a vacuum interrupter is installed inside, the lower porcelain bottle is a pillar porcelain column, and the three-phase porcelain bottle is co-installed on a structure box, and the moving end of the arc extinguishing chamber is connected with the output shaft of the spring mechanism through the turning arm, the tie rod. The connecting rod of the spring mechanism and the circuit breaker is in a waterproof mechanism box. The product is mainly composed of vacuum interrupter, current transformer, transmission mechanism and spring operating mechanism.
Environmental conditions of use
Altitude: ≤2500m;
Ambient air temperature: up to 40°C, min. -35°C;
Wind pressure not exceeding 700Pa (equivalent to wind speed 34m/s);
The seismic intensity does not exceed 8 degrees; Air pollution level: Level III;
Daily temperature difference: no more than 25°C
Main technical parameters
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serial number
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appellation
|
unit
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parameter
|
||
|
1
|
Rated voltage
|
KV
|
40.5
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||
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2
|
Rated insulation level
|
Power frequency withstand voltage
|
Dry
|
95
|
|
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Wet (to ground)
|
80
|
||||
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Lightning impulse withstand voltage (peak value)
|
185
|
||||
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3
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Rated current
|
A
|
1250；1600；2000
|
||
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4
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Rated short-circuit interrupting current
|
KA
|
20；25；31.5
|
||
|
5
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Rated sequence of operations
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open-0.3S closeOpen-180S- closeOpen
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|||
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6
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Rated number of short-circuit interrupting currents
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次
|
12
|
||
|
7
|
Rated short-circuit closing current (peak)
|
KA
|
50、63、80
|
||
|
8
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Rated peak withstand current
|
KA
|
50、63、80
|
||
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9
|
Rated short-circuit withstand current
|
KA
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20、25、31.5
|
||
|
10
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Rated short-circuit duration
|
S
|
4
|
||
|
11
|
Average fraction speed
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m/s
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1.5±0.2
|
||
|
12
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Average speed
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ms
|
0.7±0.2
|
||
|
13
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Contact closing bounce time
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≤ 5
|
|||
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14
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Three-phase (split) gate synchronous time difference
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≤ 2
|
|||
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15
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Closing time
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≤ 150
|
|||
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16
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Opening time
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≤ 60
|
|||
|
17
|
Mechanical life
|
number
|
10000
|
||
|
18
|
Rated operating voltage and rated voltage of auxiliary circuit
|
V
|
DC 110/220
|
||
|
AC 110/220
|
|||||
|
19
|
DC resistance per phase circuit (without transformer)
|
μΩ
|
＜ 100
|
||
|
20
|
Static and dynamic contacts allow for wear thickness
|
mm
|
3
|
||
|
21
|
weight
|
KG
|
800
|
||
Dimensions of the main body of the product
