general checks including assembly,tightness,external insulation, paint, corrosion protection, operating devices, earth connection and operations counter
checks of electrical circuits including wiring, position indication, alarms, lockouts, heating and lighting
checks of the insulation including filling pressure and quality
site operations
insulating and interrupting fluid alarm and lockout pressures on rising and falling pressures
characteristic rising and falling operating pressures for hydraulic and pneumatic systems including lockout, low pressure alarm, safety valve
power consumption during operations
verification of the operating sequence
closing and opening times of each pole including control and auxiliary contacts
recharging time of the operating mechanism
mechanical travel characteristics for circuit breaker
opening,closing and auto reclosing at the minimal functional pressure for operation
anti pumping operation checking
the application of an opening command on both releases simultaneously