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户内高压交流真空断路器是一种专门设计用于户内电力系统中的开关设备，它属于高压电器元件之一。"ZN"通常代表金属封闭式组合电器（Gas Insulated Switchgear, GIS）系列，"65"可能表示该断路器的特定型号或系列编号，"12"则表示该断路器的工作电压等级为12kV（即一万两千伏特），适应于交流电的操作，具备开断、关合、承载正常电流和在规定时间内关合及开断规定的过载电流以及短路电流的能力。 简单来说，ZN65-12户内高压交流真空断路器是一款能够在高压交流电路中安全、有效地进行分断和闭合操作的开关装置，适用于变电站、配电室等电力设施的馈线或主回路保护，以确保电力系统的可靠运行和用电安全。