Combining some common incidents and measures to check and overcome incidents
11/06/2020
- Handling of abnormal transformer operation and malfunction
During operation, the MBA had unusual phenomena such as: Oil flow, lack of oil, overheating, abnormal noise, local heating at the top of the ceramic core, abnormal pressure regulator operating ... should seek corrective measures and solve quickly, if not, stop the machine to stop repairing.
- The operation of the MBA must be stopped in the following cases:
There is a loud, uneven sound and an electrical discharge next to the machine.
The temperature of the machine rises abnormally under normal cooling conditions and rated load.
Oil spills out of the machine through an extra oil tank, broken explosion-proof glass or oil spraying through a safety valve.
The oil level drops below the prescribed level and continues to lower.
The color of oil changes abruptly.
Porcelain cracked, broken, flashed surface, the oil pressure of the porcelain exceeded the allowed level. The core is red hot.
- When the MBA automatically disconnects the circuit:
Firstly, it is required to troubleshoot the audio problem and check the signal relays to determine the cause.
Firstly, it is required to troubleshoot the audio problem and check the signal relays to determine the cause.
If steam Relays or Thermal Relays have to check, the temperature of the case and other parts, if not overcome, stop operating the machine and carry out repairs.
If the transformer cuts off due to overload, external short circuit or faulty protection, it is necessary to adjust and reduce unnecessary load, then it may be possible for the MBA to resume operation.
- When the temperature of the oil in the MBA goes up to the limit, you can reduce the temperature by:
Check MBA load and cooling environment temperature.
Check cooling equipment, ventilation status of machine location.
If the oil level drops below the specified limit, a replenishment is required.
- When the machine deviates voltage:
Unbalanced output voltage between the phases: need to check the voltage of the phases, if the error must be checked again the transformer of the MBA.
Input and output voltage is too high or too low: it is necessary to change the step of the MBA and check whether the input and output voltage is at the prescribed level.
- When the MBA is on fire:
It is necessary to completely cut off the voltage from the machine, notify the Fire Prevention and Fighting Police and conduct the fire extinguishing according to the fire and explosion prevention process.
It is necessary to completely cut off the voltage from the machine, notify the Fire Prevention and Fighting Police and conduct the fire extinguishing according to the fire and explosion prevention process.
