The CTMP-2006 relay test mode allows the testing of over-current, over-voltage and under-voltage protective relays including test of time characteristics. This mode also provides for the measurement of burden voltage and low values of resistance. The screen above shows the output current as sourced by the X1-X2 terminals as OA and the burden voltage measured by the H1-H2 terminals across a 1000 micro-ohm test resistor as BV. The screen displays the measured value of the resistance in micro-ohms. This screen is accessed for relay pickup tests, ammeter calibration, burden tests, resistance tests, trip testing by secondary injection and other test functions requiring a current source. The I squared T value is a test set protective function that limits the operating time at currents over the continuous rating of the unit, 30 AMPS. The high current mode is provided by a 0-10V output of the test set that will source up to 80 Amps for short duration tests. The ability of this test set to precisely measure the amplitude and angles of AC voltages and currents allows an accurate determination of the resistive component of an impedance connected to the unit. It can therefore replace the classic “ductor” or DLRO and measure contact resistance of circuit breakers and switches over a range of 0-6500 micro-ohms. Current measurement accuracy over the 0 to 80 AMP range is 0.5% of reading.

The voltage test mode provides an output of 0-200VAC and is capable of operating point or "pickup" tests. The unit will time under-voltage relay drop-out on removal of voltage and over-voltage pickup on application of voltage. Screens are not shown but are similar to current tests. Voltage measurement accuracy is rated at 0.2% of reading.

The screen above shows the unit timing a protective device. Timer may be stopped on closing or opening contact. These sensing modes are selected from an easy to use menu.