The tester is a new intelligent testing instrument
The tester is a new intelligent testing instrument. The previous relay protection test tools were mainly composed of voltage regulators and phase shifters, which were bulky and imprecise, 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, and substation comprehensive automation has become the mainstream. The portable design is suitable for on-site use.
The tester simplifies operation while increasing the instrument's functions. It can perform various calibrations on common relays, and the panel layout is exquisite, making it easy for operators to operate.
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l The instrument is equipped with a separate auxiliary circuit with adjustable power output (wide adjustment range); it can be used as a voltage source alone;
l Digital display for intuitive reading;
l Compact structure, lightweight, easy to carry and transport.
l The instrument can change gears without rewiring.
l The main and auxiliary circuits of the instrument do not require external multimeters or meters; the main circuit voltage and current are directly displayed (excitation characteristics are intuitive).
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
Maximum output capacity: 1500VA
2. Instrument power supply: AC220V±5%, 50Hz±5%
3. Functions:
The instrument can calibrate the following various relays or group protections.
① Measuring relays: including current and voltage relays, can measure their pickup value, dropout value and coefficients.
② Time relays: can measure their pickup value, dropout value and operating time, with time measurement error not greater than 0.2ms.
③ Auxiliary relays: calibration of various auxiliary relays with pickup coils and holding coils, can measure pickup value, dropout value, holding value and operating time.
