ZN65-12
ZN65-12 Series
Indoor Vacuum circuit-breaker
12kV,...3150A,...40kAZ N 6 5 - 1 21
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Type and Designation
ZN 65 - 12 /
VCB Breaking current
Indoor Rated current
No. of design Rated voltage
2
Operating Conditions
Site altitude 1000m not more than 1000m
Ambient temperature 40 15 max. to 40 min. to -15
95% 90%
Relative humidity Average dialy not more than 95%, average monthly not
more than90%
Shock of earthquake 8 magnitude max.
In the application of no fire explosion heavy dust chemical corrosion and violent vibration,etc.
Note:
Specical condition and requirement Consult with the manufacture
3
Technical Data
Electrical data
Rated voltage kV 12
1250
630 1250 1600
Rated current A 1250 1250 1600 2000
2000 2500
3150
Rated frequency Hz 50
Rated short-circuit breaking current (rms.) kA 20 25 31.5 40
Rated short-time withstand current(peak) kA 50 63 80 100
Rated short-time withstand current kA 20 25 31.5 40
Rated peak withstand current kA 50 63 80 100
Rated operations of short-circuit breaking current operations 50*
1min Rated power-frequency withstand voltage(1min) kV 42
Rated lightning impulse withstand voltage kV 75
Rated duration of short-circuit s 4
Rated single capacitor bank breaking current A 630
Rated back-to-back capacitor bank breaking current A 400
Percentage of DC. component of breaking current 40%
O 0.3s CO 180s CO( 31.5kA)
Rated operating sequence
O 180s CO 180s CO(40kA)
40kA, 30 30 Operations with 40kA
1Mechanical data
Contact stroke mm 10 1
Contacting travel mm 3 0.5
Bounce ms 2
Diff A-B-C ms 2
Opening speed m/s 0.9-1.5
Closing speed m/s 0.4-0.9*
Opening time(Rated voltage) ms 40
Closing time(Rated voltage) ms 30-60
Mechanical endurance 20000/31.5kA, 10000/40kA
operations
Rated operating voltage of opening/closing coil V AC/DC 220/110
Power of charging motor W 70 31.5kA 90 40kA
Power of opening/closing coil W 300
Charging time s 15
Permissible value of main circuit resistance 40
Mass of the circuit-breaker kg 120 2000A 150 2500A
Contact erosion limit mm 3
Rated compressive force of contact N 3200 3500/5000 5500
Bouncing back amplitude of opening contact mm 2
40kA 1.0~1.8m/s 40kA, opening speed:1.0~1.8m/s
0.8~1.2m/s closing speed:0.8~1.2m/s
ZN65
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Dimensions
12kV/630A, 1250A/20kA, 25kA, 31.5kA,
40kA
Fig1: Dimension for VCB of 12kV/630A,
1250A/20kA, 25kA, 31.5kA, 40kA
Note: With phase plate on request
Z N 6 5 - 1 212kV/1600A, 2000A, 2500A, 3150A/31.
5kA, 40kA
Fig1: Dimension for VCB of 12kV/1600A,
2000A, 2500A, 3150A/31.5kA, 40kA
Note: With phase plate on request
Z N 6 5 - 1 2
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Structure and Function
Structure
The mechanism and the main circuit of the
VCB are located at the front and back sides.
The spring charging mechanism is laid in front of
it. The operating device is designed in four
function units separately, i.e the closing function
unit and the charging function unit. The main

ZN65-12型户内高压交流真空断路器是一种专门设计用于交流高压电力系统中的开关设备，其主要用于额定电压为12kV（即12千伏特）的配电网络中。该断路器采用了先进的真空灭弧技术，能够在分闸和合闸过程中通过高真空环境来熄灭电弧，从而实现快速、安全且无触点的开断操作，确保了线路在正常运行及故障情况下具有良好的隔离和切断能力。 主要特点包括： 1. **真空灭弧**：利用高真空环境作为绝缘和灭弧介质，极大地提高了断路器的操作速度和可靠性，同时降低了维护成本和对周围环境的影响。 2. **户内安装**：适用于城市配电网的室内配电设施，占用空间相对较小，适应性强，特别适合于紧凑型变电站或开关柜内使用。 3. **高压交流系统**：专为交流高压电力系统设计，能够承受和开断不同等级的电流负荷，如负荷开关、变压器馈线等。 4. **安全性与稳定性**：具备完善的保护功能，如过载、短路、欠压等保护措施，能有效防止电气火灾和其他安全事故的发生，并确保系统的稳定运行。 总之，ZN65-12型户内高压交流真空断路器凭借其优良的技术性能和广泛的适用性，在高压配电网中发挥着关键性的控制与保护作用。