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型戶內(nèi)高壓交流真空斷路器是一種專門設計用于戶內(nèi)電力系統(tǒng)中的開關(guān)設備，它屬于真空滅弧技術(shù)的一種高壓電器。該型號斷路器的主要特征包括： 1. **額定電壓**：12kV，表示它能夠安全、有效地切斷在12千伏級交流電網(wǎng)上操作的電壓。 2. **額定電流**：具備一定的短路電流開斷能力，但具體數(shù)值需查閱產(chǎn)品數(shù)據(jù)手冊，因為這會根據(jù)不同的電流級別和保護特性有所差異。 3. **類型**：戶內(nèi)型，意味著它適用于室內(nèi)安裝環(huán)境，具有緊湊體積、低噪音及良好的防護等級等特點，以適應建筑物內(nèi)的空間限制和安全要求。 4. **滅弧介質(zhì)**：采用真空作為滅弧介質(zhì)，確保在分合閘過程中能迅速并有效熄滅電弧，避免觸頭燒損和有害氣體產(chǎn)生，提高開關(guān)設備的可靠性和使用壽命。 5. **適用范圍**：主要用于電力系統(tǒng)的負荷開關(guān)、變壓器饋線、母聯(lián)等高壓配電設備中，作為控制和保護用電設備的重要元件。 總之，ZN68A-12型戶內(nèi)高壓交流真空斷路器是一款高效、安全、可靠的高壓開關(guān)設備，在電網(wǎng)運行維護中發(fā)揮著關(guān)鍵作用。