High Voltage Electric Components - High Voltage Vacuum Circuit Breaker

Indoor High Voltage Vacuum Circuit Breaker

Indoor High Voltage Vacuum Circuit Breaker - Electrical Switch

Introduction - Indoor High Voltage Vacuum Circuit Breaker 1. ZN85-40.5 Series Indoor High Voltage Vacuum Circuit Breaker is an indoor device of three-phase AC 50Hz 40.5kV rated voltage and configured with special 3AV3 spring actuator. The circuit breaker can be adopted in JYN1-10.5(Z) removal-type metal closed Switchgear and KYN61-40.5 assembled metal closed Switchgear. It is the most ideal circuit breaker of 40.5 KV devices. The series products have high parameters, strong breaking ability and reliable actions. It is of stable performance, long life span, and easy maintenance and without explosion or pollution danger. It is applied to the protection and control of single generatrix system electrical facilities in industrial and mining enterprises, power plants and substations. It also can be used in other frequently operated places as well as closing capacitor groups.
2. The product adopts integrated and modularized design which has reasonable simple structure. The arc chamber is on the upper side and the interlock as well as actuator is below. The 3AV3 spring actuator works stably and reliably without any adjustment. The vacuum arc chamber is in the closed insulation cylinder which reduces the overall dimension.

Working & Environmental Conditions - Indoor High Voltage Vacuum Circuit Breaker
1. Environmental temperature: Maximum +40 °C, minimum -15 °C (General), and -25 °C (Alpine region);
2. Humidity: Daily average relative humidity <95%, Daily steam pressure < 2.2kPa, monthly average relative humidity < 90%, monthly steam pressure <1.8kPa
3. Altitude: ≤1000m
4. Earthquake intensity < 8°
5. No flammable, explosive, dangerous chemical corrosion or dramatic shake.
Model Meaning
Technical Parameters - Indoor High Voltage Vacuum Circuit Breaker
Name Unit Parameter
Rated voltage KV 40.5
Rated current A 1600
Rated insulation level 1 min work frequency voltage tolerance KV 95
Rated lightening impact current tolerance 185
Rated frequency Hz 50
Rated short term current tolerance KA 31.5
Rated peak value current tolerance KA 80
Rated duration time of short circuit current S 4
Rated short circuit breaking current KA 31.5
Rated short circuit closing current KA 80
Rated operation sequence O-0.3s-CO-180s-CO
Opening time Ms ＜80
Rated breaking times of short circuit current Times 20
Rated cable charge breaking current A 50
Rated operation voltage V -110/~110,-220/~220
Mechanical life span Times 10000

Mechanical Features - Indoor High Voltage Vacuum Circuit Breaker
Name Unit Parameter
Contact openness size Mm 22±2
Contact excess travel Mm 3.5±0.5
Allowed accumulated attrition thickness Mm 3
Average Switch closing time M/s 0.65±0.15
Average Switch opening time (contact opens 12mm) M/s 1.8±0.2
Closing switch and bouncing time S ≤0.002
Time differences of three-phase closing switch in the same period S ≤0.002
Time differences of three-phase opening switch in the same period S ≤0.002
Contact bounce amplitude of opening the switch Mm 2
Resistance of each circuit phase (not includes contact arm) μΩ ≤40
Contour & Installation Dimensions
Picture1: Contour Dimensions of the Circuit Breaker Installed With MKYN61-40.5(Z)
Picture2: Contour Dimensions of the Circuit Breaker Installed With MJYN1-40.5(Z) Back