Resonant Test Systems, type SGM is applied for the generation of a continuously variable alternating (AC) voltage of a fixed frequency (mainly 50 or 60 Hz) for high-voltage (HV) routine, type and development testing of capacitive test objects. They can also be applied for HV on-site tests, but SAMGOR offers for that application the more economic solution of frequency-tuned resonant test systems.

Capacitive test objects are cables, capacitors, gas insulated switchgear (GIS), but also large rotating machines, instrument and power transformers (for applied voltage tests). Resonant test systems enable not only HVAC tests at 50/60 Hz, but also at higher or lower frequency (20-300 HZ) and dynamic tests with fast voltage changes (e. g. for capacitors). Because of their precise sine-wave, resonant test systems are very well suited for the combinations of HVAC withstand tests with partial discharge (PD) measurement. SAMGOR adapts the resonant test systems to the requirements of the relevant standards and the demand of the customer.

The main advantage of resonant test systems is the low power demand, because only the losses in the test circuit must be replaced from the power supply. The quality factor Q which is the relation between the test power S and the loss power P ranges between Q = 10 and values up to 100, this means only 10 to 1 % of the test power must be supplied. A resonant test system is remarkably lighter, cheaper and more economic than an AC transformer test system and should be applied if the test objects are capacitive. In case of a disruptive discharge the test object is not destroyed, because the system goes out of resonance. SAMGOR resonant test systems are characterized by a very modern system configuration and have proven highest reliability.

Tunable reactor modules for series resonant circuits are available between 50 and 1600 kV and test power between 50 and 37500 KVa.

Tunable frequency modules for series resonant circuits are available between 100 and 1600 kV and test power between 50 and 9000 KVa. (Typical Frequency adjustment: 10-300 HZ)

Application

◆Air-cushion base frame for transformers (AeroGo)

◆HV filter inductance for coupling capacitor

◆Standard capacitor

◆Additional HV connections

◆Partial Discharge detectors

◆Capacitance and power loss factor measuring bridges