High Voltage Electric Components - High Voltage Vacuum Circuit Breaker

High Voltage Vacuum Circuit Breaker

Outdoor Pole Mounted High Voltage Vacuum Circuit Breaker

Introduction: High Voltage Vacuum Circuit Breaker
MZZ11-12/T630-20 Outdoor Pole Mounted High Voltage Vacuum Circuit Breaker is an outdoor high voltage power distribution equipment which is of three-phase AC 50Hz 630A~1250A rated current 16kA~20kA short circuit current. It is mainly used in opening and closing load current, overload current and short circuit current in the power system. It is applied to the protection and control of the power distribution system in industrial mining enterprises as well as agriculture network and many other frequently used places. Having kept all reasonable parts and good performance of ZW32, it multiplies the overall mechanical life span including the arc chamber than the former model. Its life span can reach as high as sixty thousand times and thirty times free maintenance during the lifetime.


Working & Environmental Conditions - High Voltage Vacuum Circuit Breaker
1. Environmental temperature: -40°C~+55°CDiurnal temperature difference25°C
2. Altitude: Lower than 2000m
3. Wind Pressure: No more than 700 Pa (equal to wind speed of 35 m / s)
4. No regular dramatic shake, earthquake intensity < 8°
5. No strong corrosion gas , conductive media (such as various acids, large alkali, thick smoke)
6. Anti-filthy-capacity: Ⅳ
Model Meaning of High Voltage Vacuum Circuit Breaker

Main Technical Parameters - High Voltage Vacuum Circuit Breaker [Electrical Switch]
Order Name Unit Parameter
1 Rated voltage KV 12
2 Rated current A 630/1250
3 Rated frequency HZ 50
4 1min work frequency voltage tolerance Dry test KV 42/49
Wet test 30
5 Lightening impact current tolerance (peak value) alternated, towards the ground/fracture KV 75/85
6 Rated short circuit breaking current KA 20
7 Rated short circuit closing current (peak value) KA 50
8 Rated peak value current tolerance KA 50
9 4S short term current tolerance KA 20
10 Rated operation cycle   Open-0.3S-close open-180S-close-open
11 Rated breaking times of short circuit current Times 3
12 Mechanical life span Times 50000
13 Secondary circuit 1min work frequency voltage tolerance KV 2
14
protective CT		 RATIO A ( )/5
CAPACITY VA 12
15 Weight Kg 100

Order Name Unit Parameters
1 Contact openness size Mm 11±1
2 Contact excess travel Mm 3+1.0 3-0.3
3 Average Switch closing time M/s 0.65±0.15
4 Average Switch opening time M/s 1.1±0.2
5 Time differences of three-phase closing switch in the same period Ms ≤2
6 Switch closing and bouncing time Ms ≤2
7 Switch closing time Ms ≤60
8 Switch opening time Ms ≤70
9 Direct current resistance of each circuit phase μΩ ≤200
10 Dynamic, stable contact allowed accumulated attrition thickness Mm 3
Contour & Installation Dimensions - Picture 1:  Contour and Installation Dimensions of ZW32-12/M630-20
1 Insulated cylinder  2 Vacuum arc chamber (in the cylinder) 3 Hoist ring 4 Switch handle 5 Energy storage handle6 The cabinet
7 permanent magnetic actuator(inside the cabinet) 8 open/close switch guides 9 Aviation plug 10 Current Transformer
Picture 2:  Contour and Installation Dimensions of MZW32-12/M630-20 (attached isolated switch)
1 Isolated knife 2 Insulated bar 3 Insulator 4 Static contact 5 isolated switch support 
6 Isolated switch actuator handle 7 Isolated switch support    8 Interlock bar
Back