Product Introduction

Product overview

---Zw3m-12 outdoor high-voltage fast permanent magnet vacuum circuit breaker is an outdoor distribution vacuum circuit breaker with rated voltage of 12kV and three-phase AC 50Hz.

---Outdoor high-voltage vacuum circuit breaker is a new generation of outdoor column vacuum circuit breaker developed to meet the needs of smart grid.

--- It is used to switch loads of different properties and frequent operations, and has the ability to break short-circuit current for many times.

---It can be used as the 10kV side outgoing line of the main transformer of the substation and the switch on the column of the distribution network.

---It is the preferred equipment to realize the intellectual, automation and miniaturization of the distribution network.

Product photo

Technical parameters

Item	Unit	Parameter
Rated voltage	kV	12
Rated current	A	630/1250
Rated frequency	Hz	50
Rated lightning impluse withstand voltage(peak)	kV	ground 75/fracture 85
Rated short-time power frequency withstand voltage(1min)	kV	wet test 34/ dry test 42/ fracture 48
Rated short-circuit breaking curent	kA	25
Rated short-circuit breaking curent times	Times	30
Rated short-time withstand current	kV	25
Rated short circuit duration	s	4
Rated peak withstand current	kA	50
Rated short-circuit making current	kA	50
Power frequency withstand voltage of secondary circuit(1min)	kV	2
Rated operating sequence		O-0.3s-CO-180S-CO
Mechanical life	Times	30000

Working conditions

1. Ambient air temperature: upper limit + 70 ºC, lower limit - 40 ºC

2. Air relative humidity: the daily average value shall not be greater than 95%, and the monthly average value shall not be greater than 90%;

3. Altitude: < 2000m;

4. Wind pressure: no more than 700pa (equivalent to wind speed of 34m / s)

5. Pollution level: Class V (specific creepage distance ≥ 31mm / kV)

6. Icing thickness: ≤ 10mm;

7. Seismic intensity: ≤ 8 degrees;

8. Installation site: there shall be no fire, explosion hazard, serious pollution, chemical corrosion and violent vibration.

Main Functions

1. protection: it is equipped with three-stage voltage blocking directional overcurrent protection, inverse time overcurrent protection, zero sequence protection, acceleration protection, overload protection, low-frequency load shedding, low-voltage splitting and three-phase triple reclosing;

2. Measurement: three-phase voltage, current, power factor, frequency, etc;

3. control function: automatic reclosing, local control and remote control can be set

4. Communication function: standard RS232, RS485 or Ethernet interface, supporting optical fiber, distribution network carrier, wireless, twisted pair and other communication modes, GPRS short message or communication, etc;

5. Other functions: local display, parameter setting, fault recording and alarm, etc.