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Zw P-12 Series outdoor prepaid & metering vacuum circuit breaker

Zw P-12 Series outdoor prepaid & metering vacuum circuit breaker

Zw P-12 Series outdoor prepaid & metering vacuum circuit breaker

Product description Zw P-12 Series outdoor prepaid & meteringvacuum circuit breaker is a 3-phase AC, 50, 60 Hz, rated voltage of 12 KV outdoorvacuum circuit breaker, having metering function to be a integrated switchingunit. Equipped with 3-phase
Published in2018-08-04
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Detailed description

Product description

Zw P-12 Series outdoor prepaid & metering vacuum circuit breaker is a 3-phase AC, 50, 60 Hz, rated voltage of 12 KV outdoor vacuum circuit breaker, having metering function to be a integrated switching unit. Equipped with 3-phase multi-function meter the unit realizes switching off or closing load current, overload current and short-circuit current of distribution system. As a high-precision medium-voltage metering device, it also has multi-function display that are displaying active power, reactive power, active demand, power factors, prepaid amount, rate of payment, all measurement, settlement, accounting functions. Having used International standard IC card and RS485 interface, infrared communication, large screen LCD display and many other advanced technologies, it can flexibly pre-set a variety of functions, such as overload alarm and automatic power off, phase missing alarm, recording, automatic meter reading. This function can be make use of IC card or laptop computer as a medium to exchange information transmission between user and compute of power supply department. The power sector can choose one or more transmission modes according to local specific conditions. It is convenient for the electric power department to realize computer network management, so as to meet the requirement of effective and timely modern management for users.


Working Condition:
1. Altitude not exceeding 2000m;
2. Ambient temperature: -30° C ~+40° C;
3. Pressure: No more than 700 pa(the equivalent of wind speed 34m/s)
4. Earthquake level not exceeding 8 class;
5. Pollution level: 3


3. Technical parameters of the circuit breaker
No. Item Unit Parameters
1 Rated voltage kV 12 24
2 Rated frequency Hz 50
3 Rated current A 630 1250
4 Rated short circuit breaking current kA 20 25
5 Rated peak withstand current (peak) kA 50 63
6 Rated short time withstand current / duration kA/s 20/4 25/4
7 Rated short-circuit current (peak) kA 50 63
8 Rated operating sequence
O-0.3s-CO-180s-CO
9 Mechanical life time Circuit Breaker 10000
Disconnector 20000
10 Rated current breaking times time 10000
11 Rated short-circuit breaking current breaking times time 30
12 Power frequency withstand voltage (1min):( wet) phase-to-ground (dry), phases, / fracture kV 34/42/49 50/65/79
13 Lightning impulse withstand voltage (peak:phase-to-ground (dry), phases, / fracture kV 75/85 125/145
14 Secondary circuit 1min power frequency withstand voltage V 2000
15 weight kg =< 100 =< 150


4. Product Structure
        Main circuit breaker of ZW-P-12 Unit is integrated by a solid letters column, current transformers, spring mechanism and base composition. Spring operating mechanism and pole fixed to the base, integrated solid seal pole, current transformer, sealing structure between the spring mechanism to adapt to the outdoor environment. It is compact shape, nice, concise structure, easy installation, and installation without having to adjust to meet the interrupter open distance and overtravel requirements.
        The circuit breaker is also reserved for auxiliary switch contacts, fully meet the needs of different users. In order to meet customer needs, but also the addition of a clear fracture isolation switch isolation, have reliable mechanical interlock between the circuit breaker and, when not needed, isolation switch disassembly simple and convenient.

5. Mechanical parameters
No. Item Unit 12kV 24kV
1 Open contacts mm 9 ± 1 12 ± 1
2 Contact Overtravel mm 2 (0 / +1) 3(0/+1)
3 Opening speed m / s 1.2±0.2 1.4±0.3
4 Closing speed m / s 0.65±0.2 0.7±0.2
5 Contact closing bounce time ms =< 3
6 White center distance mm 280±2 340±2 380±2
7 Three-phase closing different period ms =< 2
8 Breaker loop resistance μ Ω < 80
9 Closing time ms 25 - 60
10 Opening time ms 18 - 45
11 Energy storage motor rated power W 40 70


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