Circuit Breakers / Protection Relays
Circuit Breakers
Circuit breakers are used to protect equipment from overcurrent situations caused, for example, by short circuits or ground faults in or near such equipment. Electrical power distribution systems and their components need protection from numerous types of malfunctions, including overcurrent conditions, overvoltage conditions, undervoltage conditions, reverse current flow, and unbalanced phase voltages.
Alot of the Air Circuit Breakers and the Oil Circuit Breakers installed between the 60’s and 80’s are now beginning to show their age. Regular servicing and maintenance of the Circuit Breakers are mandatory in order to prolong the life span of the Circuit Breakers. Bremco Electrical are specialists in the servicing and maintenance of circuit breakers. The Director and Leading Technician has over 30 years experience in the servicing of Circuit Breakers.
It is recommended that Preventative Maintenance be established with each client therefore eliminating the breakdowns and the loss of time and money when emergency shut downs need to occur inorder to service a faulty Circuit Breaker & Protection Relays. Bremco Electrical can offer each of their clients a Preventative Maintenance schedule which will allow us to stay on top of any issues thus giving our client the piece of mind.
Our standard Circuit Breaker service includes:
- Arc chute inspection and clean
- Replacement of Asbestos arc chutes (if necessary)
- Auxiliary contact inspection, clean and tighten
- Cluster inspection, clean and tighten
- Contact resistance test
- Contact temperature test
- Contact inspection, clean, tighten and adjustment
- Current transformer functionality test
- Earth contact inspection, clean and tighten
- Electrical wiring inspection and connection check
- Functionality test of charging motor, close, trip and undervoltage coils
- General clean
- Insulation inspection and clean
- Insulation resistance test
- Lubrication of mechanism, linkages and springs
- Manual operational test
- Mechanical inspection, clean and tighten
- Mechanical interlock inspection, tighten, lubricate and test
- Protection relay test including trip time test
- Secondary contact inspection, clean and tighten
- Shutter inspection, clean, tighten and test
- Inspection of oil, oil tank and analysing of oil
- Test report with recommendations
Protection Relays
We can test the built in protection relays within circuit breakers and external protection relays. In order to keep the highest integrity of these protection devices, regular testing is essential.
We can service the following Protection Relay types:
- Differential
- Directional
- Earth fault
- Earth leakage
- Overcurrent
- Overvoltage
- Reverse power
- Thermal overcurrent
- Undervoltage