Acceptable leakage current for 6.6kv vacuum breaker

A very specific question!

For a 6.6 kV vacuum breaker, the acceptable leakage current is typically specified in the manufacturer's documentation or in relevant industry standards. Here are some general guidelines:

• According to IEC 62271-100:2018 (High-voltage switchgear and controlgear - Part 100: General), the maximum permissible leakage current for a vacuum circuit breaker (VCB) at 6.6 kV is:
  • 1.5 mA for a rated voltage of 3.3 kV to 6.6 kV.
  • 2.5 mA for a rated voltage of 6.6 kV to 12 kV.
• According to IEEE C37.04-2019 (IEEE Standard for Switchgear - AC Switchgear, Part I), the maximum permissible leakage current for a vacuum circuit breaker (VCB) at 6.6 kV is:
  • 2.5 mA for a rated voltage of 3.3 kV to 6.6 kV.
  • 5.0 mA for a rated voltage of 6.6 kV to 12 kV.

Please note that these values are general guidelines and may vary depending on the specific manufacturer, model, and application of the vacuum breaker. It's essential to consult the manufacturer's documentation or contact the manufacturer directly for the specific acceptable leakage current value for your 6.6 kV vacuum breaker.

In general, leakage current is an important parameter in the design and testing of vacuum circuit breakers, as it affects the device's performance, reliability, and safety.