Importance of overcurrent protection
Instantaneous overcurrent protection is one of the most basic and important current protection methods in power systems. Its core characteristics are: fast action and no delay.
The function of instantaneous overcurrent protection: In the event of a severe short circuit, it disconnects the circuit as quickly as possible to protect equipment and personnel. Without instantaneous overcurrent protection, an 8000A current lasting 0.5 seconds would burn out a cable.
The operating principle of instantaneous overcurrent protection = Real-time current monitoring → Once the set value is exceeded → Direct tripping without delay
Why is overcurrent protection needed?
1- Protects equipment from burnout
If not quickly disconnected, cables will melt within seconds, and transformers/generators will be reduced to scrap metal.
2- Prevents the escalation of accidents
If a short circuit is not disconnected in time, it will affect upstream equipment
Potentially causing cascading tripping → Power outage of the entire busbar → Large-scale power outage
Instantaneous overcurrent protection limits the fault to a minimum
3- Ensures personal safety
Instantaneous overcurrent protection trips before danger occurs, reducing the risk of casualties.
Products Description
VTZ-12GD-MT vacuum circuit breaker combination electrical appliance is a special vacuum circuit breaker for underground mining with rated voltage of 12kV and AC 50/60Hz.
It adopts permanent magnet mechanism and has mechanical manual closing and opening functions.
It is suitable for various places with explosion-proof requirements for power facilities.
The trolley unit is used in conjunction with PJG9-10 switch cabinet.
Our address
No. 1 East Gaoxin Avenue in the High-Tech Development Zone of Baoji City, Shaanxi Province, China
Phone Number
+86 180 9176 5658 (WhatsApp/Wechat)
xdtz03@westpowerelectric.com
