Wuhan Rising Electric.,CO is specialized in manufacturing all grades of transformer testing equipment, load no-load transformer characteristic tester, automatic ratio groups of test instrument, transformer winding deformation tester, power frequency testing transformer, automatic anti jamming tester, series resonance test device, partial discharge detection device, insulating oil dielectric strength tester, etc With abundant of experience and professional team we have exported our products to many countries and regions all over the world, especially the Middle East area, Asian area. Eastern Europe, etc. Also our products are widely recognized and trusted by users.

Rated Parameters/Function

The index is designed to guide the tester that all kinds of the relay protection device test can be done by the following series which modules of software.

Relay test:

Relay protection type	Test Item	Proposed test module	Remarks
Signal relay	Corresponding test items	DC Test AC and DC Test	If the intermediate relay is required AC/DC hybrid input, please test in ‘The AC And DC Test ‘module. If Rated current of the signal relay is too small, please use the voltage loop output of tester to do experiments.
Time relay
Intermediate relay
Coincidence relay
Other DC voltage and current relay
Current relay	Corresponding test items	AC Test	The sequence component relay can be tested in the special sequence module of ‘AC Test’. The inverse time relay can be tested in the "It characteristics" module.
Over (under) voltage relay
Sequence component relay
Synchronous check (or phase comparison) relay
Inverse time current relay
Differential relay	DC magnetic feature	Differential Relay, Differential Harmonic, AC/DC Test, Harmonic Test	Please refer to ‘Appendix 5’ for correct wiring in the test
	Harmonic braking feature
	Proportional braking feature	Differential Relay, AC Test
Power (directional) relay	Corresponding test items	Power Direction &Impedance, AC Test	Before testing the power (direction) relay, the type of connection and the action boundary of the protection should be determined in advance.
Impedance relay
Synchronous relay	Corresponding test items	Synchronization Test, AC Test	UA, UC of tester is fixed as the system side and the side to side voltage output for ‘Synchronization Test’ module.
Frequency relay	Corresponding test items	High-Low Frequency Test	When the ‘automatic frequency conversion’ method is chosen in the single machine, the frequency slip value can be measured.

Computer protection test:

	Relay protection type	Test Item	Proposed test module	Remarks
Line protection	Multi-section over current	Corresponding test items	AC Test	As long as the method is proper, the tests of most relays and microcomputer protection can be done by the ‘AC Test’ module, which should be selective learning.
	Over (under) voltage
	Sequence component voltage and current
	Frequency device
	Power direction protection
	Reclosing and tansform fault	Corresponding test items	Full Group Test, State Series, Comprehensive Test of Line Protection of 6-35 KV Microcomputer	Requirement that if the Synchronization check and no-voltage check test is done, the Ux as the side and side voltage output and the tester is to use Ua instead of Ux for testing.
	Distance & Zero Sequence Protection,	The Setting value verification of Distance & Zero Sequence Protection	Distance & Zero Sequence Protection, Full Group Test, AC Test	"Distance & Zero Sequence Protection” can automatically test multiple sections, various fault types and other distance and zero sequence value.
	Distance & Zero Sequence Protection,	Characteristic of Impedance	Characteristic of Impedance
	Power frequency variation distance	Setting value verification	Distance & Zero Sequence Protection	The fault current should be large enough, such as 10~15A (when CT is 5A)
	Compound voltage blocking(directional) overcurrent	Over current, low voltage, negative sequence voltage, sensitive angle	AC Test, Comprehensive Test of Line Protection of 6-35 KV Microcomputer	Some of the protection of the "low voltage" and "negative sequence voltage" input by different terminal, replacing the wiring is necessary in the test.
	Low cycle, low voltage load shedding device	Corresponding test items	High-Low Frequency Test, Comprehensive Test of Line Protection of 6-35 KV Microcomputer	If other conditions are satisfied, the device cannot move, please confirm whether the device also need to input current and switch contacts
The generator transformer protection	Differential protection	Proportional braking characteristic	Differential Protection, Differential Value, AC Test	When the differential protection is used in the differential protection of generator, it can be regarded as the transformer protection with the connection type of Y/Y, high and low voltage side balance coefficient of 1. "Differential protection" module pay attention to the curve characteristic search and the "differential value" module focuses on the differential value test. Their combination can test the differential protection.
	Differential protection	Harmonic braking characteristic	Differential Protection, Differential Value, Harmonic Test
	Loss of magnetic protection	Corresponding test items	AC Test	The angle of output voltage and current should be paid attention in the test.
	Excitation protection	Corresponding test items	AC Test
Other protection	Automatic quasi synchronization device	Corresponding test items	Synchronization Test	To do the automatic adjustment test, the line must be in accordance with the requirements of instruction when testing the input.
	Busbar differential protection	Corresponding test items	AC Test	Please see the instructions of the BP-2B and RCS-915 of "Nari part protection" on in the Appendix 6.
	Optical fiber line differential protection	Corresponding test items	AC Test	Before the test to determine whether the device to form a "self loop", if, then the protection of the action value should be equal to half of its set value.