ZN68A-12户内高压交流真空断路器

ZN68A-12
Z N 68A- 1 2Series
Indoor Vacuum circuit-breaker
12kV,...3150A,...40kAZ N 6 8 A - 11
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Type and Designation
ZN68A - 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
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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
ZN68A
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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
ZN68A-1212kV/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
ZN68A-12
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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

ZN68A-12型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，它属于真空灭弧技术的一种高压电器。该型号断路器的主要特征包括： 1. **额定电压**：12kV，表示它能够安全、有效地切断在12千伏级交流电网上操作的电压。 2. **额定电流**：具备一定的短路电流开断能力，但具体数值需查阅产品数据手册，因为这会根据不同的电流级别和保护特性有所差异。 3. **类型**：户内型，意味着它适用于室内安装环境，具有紧凑体积、低噪音及良好的防护等级等特点，以适应建筑物内的空间限制和安全要求。 4. **灭弧介质**：采用真空作为灭弧介质，确保在分合闸过程中能迅速并有效熄灭电弧，避免触头烧损和有害气体产生，提高开关设备的可靠性和使用寿命。 5. **适用范围**：主要用于电力系统的负荷开关、变压器馈线、母联等高压配电设备中，作为控制和保护用电设备的重要元件。 总之，ZN68A-12型户内高压交流真空断路器是一款高效、安全、可靠的高压开关设备，在电网运行维护中发挥着关键作用。