Product Details

Working Principle
The device has a built-in 6-digit digital stopwatch, which can be started internally or externally. When started internally, press the "Output Control" switch to start the stopwatch, and stop it by shorting the stop terminals on the panel with a contact. The stopwatch has a separate power switch and can be turned off when not in use.
Audible and Visual Indication
The circuit device has a built-in audible and visual indication circuit. When the contacts of the relay under test operate, the contacts can be connected to the audible and visual indication jacks on the test box, which will emit an alarm sound or light to indicate the operation of the relay contacts.
Auxiliary Circuit
Single-Phase Relay Protection Tester The auxiliary circuit is the same as the main circuit. AC220V power enters through a fuse, and the voltage adjusted by the small knob of the dual-carbon brush voltage regulator T1 is output through the isolation transformer T4, which can directly adjust the output of 0-20V or 0-250V AC voltage or 0-350V DC voltage. The rated current of this circuit is 1A.
Press the "Output Control" switch of the auxiliary circuit and adjust the small knob to output.
Measurement Circuit
The main circuit output adjusted by the large knob includes AC "0-250V", "0-500mA", "0-10A", "0-100A", and DC "0-350V", "0-500mA", "0-10A". Through the relay conversion on the circuit board inside the device, each time a gear is switched, the corresponding output can be monitored.
Among them, the "0-500mA" gear is included in the "0-10A" gear. When in use, the "0-500mA" monitoring is below the "0-10A" position.

Product Overview
Single-Phase Relay Protection Tester is an intelligent testing instrument. Previous relay protection test tools were mainly composed of voltage regulators and phase shifters, which were bulky and had low accuracy, and could no longer meet the calibration work of modern microcomputer relay protection. With the continuous development of science and technology, microcomputer relay protection has been widely used in line protection, main transformer differential protection, excitation control, and other fields. Substation comprehensive automation has become the mainstream. The portable design is suitable for on-site use.
The tester simplifies operation while increasing the functions of the instrument. It can perform various calibrations on common relays, and the panel layout is exquisite, making it easy for operators to operate.

Technical Parameters
1. Output Characteristics
Output 1: AC current 0～150A/10V adjustable
0～20A/35V adjustable
0～5A/8V adjustable
AC voltage 0～250V/4A adjustable
DC current 0～20A/25V adjustable
DC voltage 0～300V/4A adjustable
Output 2: AC/DC voltage 0～250V adjustable
Millisecond meter time: 0～99.9999s
Resolution: 0.1ms
Rated capacity: 750VA
Output capacity: 1500VA
2. Instrument power supply: AC220V±5%, 50Hz±5%

Features
1. Intelligent host, using high-performance digital signal processor.
2. Standalone operation.
3. Can be connected to a computer for operation.
4. 16-bit DAC chip.
5. Large-screen LCD display.
6. "Foolproof" operation.
7. New high-fidelity power amplifier.
◆ Types of relays tested: current relay, voltage relay, reclosing relay, intermediate relay, differential relay;　
◆ The instrument is equipped with fixed value output and can be used as a voltage source alone;　
◆ Digital display for intuitive reading;　
◆ Compact structure, lightweight, easy to carry and transport.

Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.