As all sites are different, our engineers will tailor the tests to suit site and client requirements. Bharti Automation regularly carries out the following routine site tests:Current transformer: CT ratio and phase error, CT magnetising curve, CT secondary DC resistance, CT secondary impedance, CT primary and secondary Insulation resistance, polarity.Voltage transformer: VT ratio, VT secondary and primary Insulation resistance, polarity. Surge arrestor Insulation resistance, variable frequency dissipation factor measurement, discharges counter check.Breaker switch: Contact resistance for all joints including main contact(s), insulation resistance

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