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VCB Maintenance & Testing

Vacuum circuit breaker servicing and diagnostics — timing, travel, contact resistance and vacuum integrity.

VCB Maintenance & Testing — Tajalli Tech

From dairy plants to BHEL sites, we keep vacuum breakers operating within OEM tolerances.

Vacuum interrupters tested up to 33 kV class

What we provide

  • Timing, travel & contact resistance
  • Vacuum bottle integrity (hipot) test
  • Mechanism lubrication & alignment
  • Relay coordination check
  • Panel cleaning & terminations
  • 24×7 breakdown response

Why choose Tajalli Tech for VCB maintenance and testing

At Tajalli Tech, we provide comprehensive maintenance and testing of vacuum circuit breakers, designed to confirm that each interrupter remains capable of quenching the arc under fault conditions. The integrity of the vacuum inside the interrupter cannot be seen and is therefore central to every service we undertake. Our engineers carry out a high-voltage vacuum-integrity test across the open contacts, measure contact wipe and travel, timing and contact resistance, and service the mechanism, working throughout to the OEM tolerances and IEC 62271-100. Our experience extends from dairy plants to BHEL sites.

What you get

On completion, you receive a detailed report recording the vacuum test voltage applied and the pass or fail result, measured contact wipe and total travel checked against the manufacturer's figures, open and close timing, contact resistance in micro-ohms, and insulation resistance. The report is prepared in accordance with applicable IS/IEC standards, with any drift from OEM limits clearly identified for corrective action.

Why is the vacuum-integrity test so important?

A vacuum circuit breaker that has lost its vacuum can appear entirely healthy until a fault occurs, at which point it is unable to interrupt the current. The high-voltage test is the only reliable means of confirming that the interrupter remains sound. Our engineers carry out this work on-site across Lucknow, throughout Uttar Pradesh and pan-India.

Can you service any make of VCB?

Yes. We service vacuum circuit breakers from all major OEMs up to the 33 kV class, working to each manufacturer's travel and wipe tolerances rather than to a generic checklist.

Ready to get started?

Get a free assessment and quote from our engineering team.