Installation for off-line diagnosis of circuit breakers.
NovaTest is a three-phase, modular, portable installation for the off-line diagnosis of medium and high voltage switching equipment tested at the equipment manufacturer (in type and batch tests), as well as in operation for the application of the predictive maintenance).
Depending on the needs, the NovaTest installation can be configured for simultaneous diagnosis on three paths, two paths or a single current path.
Among the provided diagnostic methods can be enumerated: the method of electrical contact resistance, the method of kinematic characteristics, the method of vibration analysis, the method of pressure of the actuation medium, the method of actuation times and non-simultaneities.
The parameters registered and calculated by the NovaTest installation are:
- 3Ib – currents through the control coil circuit;
- 3Ucp – voltage drops on main current routes;
- 3C – mobile contactor races;
- 3Acc – vibration accelerations;
- 3V – mobile contact speed;
- 3R – electrical resistance of the main current paths;
- 2P – pressures (connects to any of the terminals for Icp, Ib, Ucp, C, Acc).
The main technical characteristics of the NovaTest installation are:
- supply voltage: 220V / 50 Hz or 20 Vdc;
- rated current through the main circuit: max. 3 x 500 A / 0.6 s;
- current through the control coils: max. 3 x 5 Acc / 2 Aca;
- switch operating voltages: 24 – 220 Vdc and 110 – 220 VAC;
- maximum galvanic isolation voltage: 1500 Vdc.
Current use of the NovaTest installation, related software and data bank for off-line diagnostics of medium and high voltage switching equipment may result in:
- increasing the operational safety of SEN (National Energy System);
- increasing the quality of new medium and high voltage switching equipment;
- increasing the quality of overhauls and repairs performed on high voltage switching equipment;
- reducing the decommissioning time of medium and high voltage switching equipment, especially those with a vital role in the operation of SEN;
- reducing the time and costs of performing series and type tests;
- increasing the quality of series and type tests.