Building Technologies

Saelig introduces new coil for AC or fast pulse current measurements

10 July 2019

Saelig Company Inc. has introduced Teledyne Test Tools T3RC Rogowski current probes that offer broad current measurement ranges and a wide frequency span, which the company says are also easy to use in difficult-to-reach parts of circuits. Five models are available, providing measurement capabilities up to 6,000 amps and with the capability to connect around the leg of a small TO-220 device. The probes connect to any standard oscilloscope via a conventional BNC connection.

The flexibility of the probe sense coil means that measurements can usually be made without modification to the circuit under test, giving more accurate electrically isolated results with a very low insertion load (a few pH). Being designed for either battery power or wall plug operation, these Rogowski current probes are equally suited to fieldwork or benchtop measurements.

The T3RC0300-UM version features the smallest cross-section sense coil at only 1.7 mm to allow probing around the leg of small power components such as inductors, capacitors or even switching devices as small as a TO-220 MOSFET. The T3RC0600-HF and T3RC3000-HF models cover applications up to 600 A and 3,000 A respectively. With extended high-frequency coverage, 5 kV peak insulation and a wide operating temperature range from -40° C to 125° C, these probes are ideal for both industrial temperature as well as general environments. The T3RC3000-LF and T3RC6000-LF versions offer an extended low-frequency performance down to less than 1 Hz. The low-frequency performance means that the maximum droop on low-frequency pulses is typically 0.1%/ms or less, while offering the highest level of peak insulation of 10 kV and an operating temperature range of -20° C to 100° C.

T3RC features:

  • Five different probes cover a wide range of applications
  • Maximum current measurement coverage up to 6000 A
  • Maximum voltage insulation up to 10 kV peak
  • Connect to a wall plug or use with batteries
  • Low loading of the circuit under test
  • Wide coil operating temperature from -40° C to 125° C on (UM and HF), -20° C to 100° C (LF)
  • Use without modification to the DUT

The Teledyne LeCroy T3RC probes are available now from their authorized North American distributor Saelig Company Inc. For more information, click here.



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