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The main causes of capacitor explosions can be listed as follows:
• Exposure to excessive heat,
• Problems caused by harmonic distortion,
• Voltage imbalances,
• Capacitor banks replaced without applying the equal aging method,
• Reactive power control relay not complying with standard discharge times (minimum acceptable time: 30 seconds).

The main causes of capacitor heating:
• Harmonics in the system,
• Improperly designed panel designs,
• Improper product placement within the panel (e.g., the filter should be on top and the capacitor on the bottom).

According to the international IEC 60831 standard, the internal discharge resistance is designed to reduce the voltage to below 50 volts within 60 seconds. However, in practice, a period of 30 seconds is considered appropriate. For shorter periods, it is recommended to add a discharge coil or resistor to the capacitor input.

According to the international IEC 60831 standard, the internal discharge resistance is designed to reduce the voltage to below 50 volts within 60 seconds.

It is not suitable to use harmonic filters with single-body capacitors designed for 400V and 400-440V ranges. In filtered compensation systems, the voltage increases due to the filter connected in series to the capacitor. This increase is approximately 7% at the commonly used 7% tuning frequency.
In this case, the voltage across a capacitor with a nominal voltage of 400V can rise to as high as 428V. A capacitor operating continuously at this level may be damaged in a short time. The maximum voltage overvoltage values specified in the IEC 60831-1 standard regarding voltage withstand are as follows:
• Un + 10%: 8 hours/24 hours,
• Un + 15%: 30 minutes/24 hours,
• Un + 20%: 5 minutes/24 hours,
• Un + 30%: 1 minute/24 hours.