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
24
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
45
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型戶內(nèi)高壓交流真空斷路器是一種專門設(shè)計(jì)用于交流高壓電力系統(tǒng)中的開關(guān)設(shè)備，其主要用于額定電壓為12kV（即12千伏特）的配電網(wǎng)絡(luò)中。該斷路器采用了先進(jìn)的真空滅弧技術(shù)，能夠在分閘和合閘過程中通過高真空環(huán)境來熄滅電弧，從而實(shí)現(xiàn)快速、安全且無觸點(diǎn)的開斷操作，確保了線路在正常運(yùn)行及故障情況下具有良好的隔離和切斷能力。 主要特點(diǎn)包括： 1. **真空滅弧**：利用高真空環(huán)境作為絕緣和滅弧介質(zhì)，極大地提高了斷路器的操作速度和可靠性，同時(shí)降低了維護(hù)成本和對(duì)周圍環(huán)境的影響。 2. **戶內(nèi)安裝**：適用于城市配電網(wǎng)的室內(nèi)配電設(shè)施，占用空間相對(duì)較小，適應(yīng)性強(qiáng)，特別適合于緊湊型變電站或開關(guān)柜內(nèi)使用。 3. **高壓交流系統(tǒng)**：專為交流高壓電力系統(tǒng)設(shè)計(jì)，能夠承受和開斷不同等級(jí)的電流負(fù)荷，如負(fù)荷開關(guān)、變壓器饋線等。 4. **安全性與穩(wěn)定性**：具備完善的保護(hù)功能，如過載、短路、欠壓等保護(hù)措施，能有效防止電氣火災(zāi)和其他安全事故的發(fā)生，并確保系統(tǒng)的穩(wěn)定運(yùn)行。 總之，ZN65-12型戶內(nèi)高壓交流真空斷路器憑借其優(yōu)良的技術(shù)性能和廣泛的適用性，在高壓配電網(wǎng)中發(fā)揮著關(guān)鍵性的控制與保護(hù)作用。