MODEL 590F: LIVE HV CT TESTER

The Model 590F is a broad term used to describe the measurement abilities of a series of clamp on CT models used in conjunction with our popular offline CT tester called the 590G-V2 and 590J-V2. Combined they are capable of testing the CT ratio and phase accuracy on an active or live power network.

The 590F has optional configurations for either High Voltage (HV) or Low Voltage (LV) line systems. A chosen 590F clamp on CT or (Clip-on) is specifically calibrated for use with the chosen line voltage and current to an accuracy of 0.05%. The 590F HV Clip-on CT’s come with a metal case which houses an optical data interface.

The HV Clip-on and the case are mounted on to a 2.2 metre hot stick which allows for high voltage isolation to just over 100kV line to ground. Higher insulation voltage hot sticks may be used but must be specified.

For line voltages to 600V the LV Clip-on CT’s are used, a hot stick is not necessary but care must be taken when placing the Clip-on onto the line. Electronic compensation is applied to all measurements to greatly improve the Clip-on CT’s accuracy over a wide operating range, typically 50A to 1400A.