High Voltage Electric Components - High Voltage Vacuum Circuit Breaker

High Voltage Vacuum Circuit Breaker

Outdoor High Voltage Vacuum Circuit Breaker

Introduction: High Voltage Vacuum Circuit Breaker
MZZ30-40.5 Series Outdoor High Voltage Vacuum Circuit Breaker is outdoor high voltage power distribution equipment which is of three-phase AC 50Hz 40.5kV rated voltage. If installed with spring actuator or electromagnetic actuator, it can remotely control motor opening, closing switch and manually store energy or opening, closing switch. Its design performance meets the national standard GB1984-89"AC High Voltage Circuit Breaker" and IEC-56"AC High Voltage Circuit Breaker" requirements..
MZZ30-40.5 Series Outdoor High Voltage Vacuum Circuit Breaker is mainly applied to the protection and control of the power distribution system in substations, industrial mining enterprises as well as agriculture network and many other frequently used places. Its overall is of porcelain pillar structure with the vacuum arc chamber in the upper part and support porcelain in the lower part. It is used in frequently operated occasions. It has such advantages as good seal ability, anti-aging, high-voltage proof, non-combustion, long life span and easy to install and maintenance.


Main Features and Environmental Conditions - High Voltage Vacuum Circuit Breaker
1. Environmental temperature: Maximum +40 °C, minimum -30 °C (General), and -40 °C (Alpine region);
2. Altitude: ≤1000m (rated insulation level should be improved if the altitude is elevated.)
3. Wind Pressure: No more than 700 Pa (equal to wind speed of 34 m / s)
4. Earthquake intensity < 8°
5. Contamination levels: class Ⅲ
Note: Diurnal temperature difference smaller than25°C
Model Meaning of High Voltage Vacuum Circuit Breaker

Main Technical Parameters - High Voltage Vacuum Circuit Breaker
Order Name Unit Data
1 Rated voltage KV 40.5
2
rated insulation level		 Work frequency voltage tolerance 1min Dry test 95
Wet test 80
Lightening impact current tolerance (peak value) 185
3 Rated current A 1250, 1600, 2000
4 Rated short circuit breaking current KA 20, 25, 31.5
5 Rated operation order Open-0.3S-close-open-180S-close-open
6 Rated breaking times of short circuit current Times 12
7 Rated short circuit closing current (peak value) S 50, 63, 80
8 Rated peak value current tolerance
9 4S short term current tolerance 20, 25, 31.5
10 Rated short circuit duration time 4
11 Average Switch opening time M/s 1.5±0.2
12 Average Switch closing time 0.7±0.2
13 Contact closing switch and bouncing time Ms ≤2
14 Time differences of three-phase closing (opening) switch in the same period ≤2
15 Switch closing time ≤150
16 Switch opening time ≤60
17 Mechanical life span Times 10000
18 Rated operation voltage and auxiliary circuit rated voltage V DC110/220
AC110/220
19 Direct current resistance of each circuit phase (sensor excluded) μΩ ＜100
20 Dynamic, stable contact allowed accumulated attrition thickness Mm 3
21 Weight KG 800

Contour & Installation Dimensions - High Voltage Vacuum Circuit BreakerPicture 1: Contour Dimensions Diagram of MZZ30-40.5/1600-31.5 Vacuum Circuit Breaker
1 up wire outlet terminal  2 Vacuum arc chamber  3 hand hole board  4 down wire outlet terminal 5 support porcelain 6 actuator cabinet
7 doors   8 loop screw 9 door handle bar 10 actuator (inside) 11 Observation window  12 Insulated bar   13 handle arm 14 Support 16 bolt
Picture 2: Installation Diagram of MZZ30-40.5/1600-31.5 Vacuum Circuit Breaker
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