The type 5287 extends the performance of the Capacitance -tan d field test sets and MIDAS 2880 and MIDAS 2881. It adds an additional high current power supply and nominal capacitor for on-site transformer short circuit impedance measurement. The system is designed for on-site inductance testing, especially for short-circuit impedance testing at power transformers. The short circuit impedance of a winding is tested with the opposite (secondary) winding shorted. The requirement for the high current power supply and high accuracy measuring device is met with the 5287 in combination with MIDAS 2880 or MIDAS 2881. The current output is automatically interrupted when the current booster is overloaded. The interrupt is indicated at the front panel. After sufficient cooling of the power supply the system turns back into normal operating mode. The test complies with IEC 60076-5.

Advantages
• Convenient in on-site transport and measurement.
• Space saving.
• Ensures safe operation.

Applications
• Short-circuit impedance testing of power transformers.