Low-voltage instrument transformer
max. 5 000 A, max. 52 kV Trench Group

Low Power Instrument Transformers
For Medium Voltage Switchgear

The modern digital technology has modified the requirements for instrument transformers used for measurement and protection applications.
The modern secondary equipment does not need the high power output of the instrument transformers (ITs) as this was necessary for electromechanical relays.
For this reason Trench developed the LOPO- Instrument Transformers series, a range of voltage and current transformers which are compatible with the modern microprocessor controlled relays and other secondary equipment with high input impedance. LOPO- ITs fit into existing as well as future designs of switchgear and fullfill the requirements of IEC standards 60044-7 and 60044-8.
The output signal for the LOPO-Voltage Transformer is volts rather than conventional hundreds of volts; the output of the LOPO- Current Transformer is millivolts rather than conventional amperes.
Please refer to the separate leaflet for an updated list of available relays.