Relay tester DC test module provides special DC voltage and current output ,mainly satisfying the requirements of doing tests including DC voltage relay, time relay and auxiliary relay. Main interface of DC module is as the following figure shows:
Interface Instruction
Interfaces of Relay tester DC test module and ‘AC Test’ module are similar, and their operating manner are basically the same. Using Relay tester DC test module, please refer to the ‘AC Test’. Here we only illustrate their difference as follows:
Parameter Setting
The maximum Voltage output of each phase is ±160V. When higher voltage needs to be output, you can adopt two-phase voltage output. One numerical value is positive, and another is negative, then the maximum Voltage output can achieve 320V. For example, if UA=100V, UB= -100V,then UAB=100-(-100)= 200V. The amplitude of line voltage is displayed on the lower left corner of main interface. Values of UA and UB are not always equal to each other and the positive and negative polarity should be paid attention to.
The maximum current output of each phase is 10A. If higher current is needed, you can use the mode of paralleling two-channels or three-channels current. The amplitude of each phase should be equal basically.
Attention:
When processing the time test of protective relay, the ‘Manual Operation’ testing mode should be selected due to normal action time is longer. It need not change after loading rated voltage on relay, and just waiting for its action. When connecting wires, the time-delay contact of relay should be connected with the digital input of tester.
Independent DC output
There is one channels independent heavy power DC output power supply on the back panel of tester. When doing test on the spot, we adopt DC power supply to provide one channels DC power supply for relay. This power supply provides 110V or 220V two shifts for outputting, and also have OFF shift closing the output. This DC power supply outputs is through rectifying and filtering of transformer winding, so it has not the function of voltage stabilization and can’t ensure high precision.
If the display of relay can’t work well, please measure the working voltage of DC output by the multimeter firstly and check whether the voltage is normal and protector tube works well.
Attention:
The output can produce as soon as the tester is provided with DC power supply, so please pay attention on safety in utilizing the tester!