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The ZW20-12 (ZW20B-12) outdoor pole-mounted high-voltage vacuum circuit breaker is an outdoor high-voltage switchgear with a rated voltage of 12kV and a three-phase AC 50Hz. Mainly used for breaking and closing the load current, overload current and short circuit current of the power system.
It is suitable for the protection and control of substations, industrial and mining enterprises and urban and rural power distribution networks, and is especially suitable for places with frequent operations and urban automation power distribution networks. This product is matched with the controller, which can meet the requirements of the distribution automation system and can reliably and effectively complete the traditional recloser function.
Technical characteristics
Electrical connection through aviation socket and outdoor sealed control cable, with fault detection function, protection control function and communication function reliable judgment, detection of zero sequence current and interphase short circuit fault current in and out of the field, and automatic removal of single-phase ground fault The main body switch of the short circuit fault between phases and phases is vacuum extinguishing and SF6 gas insulation. The box body refers to the gas seal of Toshiba, Japan, explosion-proof, and the insulation structure technology has the excellent overall sealing performance. The SF6 gas-filled inside does not leak and is not affected by the outside world.
Normal service condition:
1. Ambient air temperature: -40℃~+40℃; daily temperature difference: daily temperature change is not more than 25℃; According to the material properties of SF6 gas, when the ambient temperature is -40℃, if the air pressure inside the cabinet is 0.05Mpa, this When the SF6 is still in gaseous state, to ensure the normal operation of the product. (When the ambient temperature is -40°C and the gauge pressure is 0.05Mpa, the SF6 liquefaction point is -55°C; at zero gauge pressure, the SF6 liquefaction point will not exceed -60°C).
2. The wind speed is not more than 35m/s;
3. There is no place where there is flammability, explosion hazard, strong chemical corrosives (such as various acids, alkalis or dense smoke, etc.) and severe vibration.
4. Altitude: ≤1000m;
5. Covering thickness: 10mm;
6. Air pollution degree: Level IV;
7. Earthquake intensity: ≤7 degrees;
8. The neutral point grounding method of the power grid: the neutral point is not grounded, the neutral point is grounded through the arc suppression coil, and the neutral point is grounded through low resistance.
Technical Parameters
No.
Item
Unit
Parameter
1
Rated voltage
KV
12
2
Rated frequency
Hz
50
3
Rated current
A
630 1250
4
Power frequency withstand
voltage(DryWet isolation fracture)
KV
423448
5
Lightning shock withstand voltage
KV
75
6
Rated short-circuit breaking current
KA
2025
7
Rated short circuit breaking current breaking times
times
30
8
Rated operating sequence
O-0.3s-CO-180s-CO
9
Rated short-circuit closing current
KA
50 63
10
Rated short-time withstand current
20 25
11
Rated peak value of withstanding current
50 63
12
Rated short circuit duration
s
4
13
Mechanical endurance
times
10000
14
Contact allowable wear thickness
mm
3
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2012
Total Annual:
1000000-9000000
Employee Number:
50~100
Ecer Certification：
Active Member
Knkong Electric Co., Ltd (Zhengzhou Knkong Mechanical And Electrical Co., Ltd)was established in 2012. A wholly-owned subsidiary of Henan Sanhe Electric Group. We are mainly responsible for overseas market exporting, electronic components, and technology import.
Relying on a h... Knkong Electric Co., Ltd (Zhengzhou Knkong Mechanical And Electrical Co., Ltd)was established in 2012. A wholly-owned subsidiary of Henan Sanhe Electric Group. We are mainly responsible for overseas market exporting, electronic components, and technology import.
Relying on a h...
