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HZJB-1200 Microcomputer Control 6 Phase Relay Protection Tester

6 phase relay test set

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.

6phase relay tester

HZJB-1200_03

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.

General Rules For Use

Industrial control computer and Windows operating system have been set in this tester. Please do not switch on or off the power supply of host too frequently.

USB interfaces are allocated on the faceplate or backplate, which allow hot-swap USB equipment (such as flash disk, etc), but the drawing or inserting must be done after the data transmission has been completed.

In order to ensure that the Windows operating system built in the industrial control computer can run steadily, please do not delete or alter the documents in hardware and the logo on the desktop at will. Please do not operate, alter, increase, delete or use the built-in Windows system to avoid any damage on the operating system. When using the USB disk to copy data, please do ensure that the flash disk is clear without virus, and also please do not use the flash disk to set other software programs in this system.

When connecting outside keyboard or mouse, please do not connect wrong terminal; otherwise the Windows operating system won't be started up normally.

Please do not shut off power supply directly during outputting so as to avoid the wrong protection action due to incorrect output.

When switch quantity is compatible with both idle contact and the potential (0～DC250V) and uses charged contact, the high terminal (anode) of contact potential should be connected with the common end +KM.

Do not insert objects (e.g.screwdrivers,etc.) into the ventilation slots or any input/output sockets. When taking the tester into operation,make sure that the air slots,the power switch and the power supply plug at the test set remain unobstructed.The instrument should be laid uprightly, or unfold the bracket for slightly tilted placement

Do not lead external AC/DC power into the voltage and current output sockets of tester.

If the disturbance is stronger on the spot or high safety is required, before doing the test, please ground the outlet of power source or the protective earth of the tester.

If the interface data is wrong or you can not input correctly when using this tester, you can settle the problem as follows: delete the "para" file under the "ERelay Test System, and then restart the running program, all data on the interface will be resumed to the default.

Test Guidance

Setting Parameter

-When doing the characteristic test of harmonic control of transformer, it can be loaded not only on high voltage side but also on low voltage side if single-phase current is selected for outputting differential current of harmonic superposition. When outputting it by adopting two-phase current synchronously, it loads the harmonic output by IA on high voltage side, and loading the fundamental wave output by IB on low voltage side. On the contrary, it can load fundamental wave on high voltage side by IA, and loading harmonic output by IB on low voltage side.

-For testing mode, you can fix fundamental wave, and adjusting harmonic from large to small in step size (harmonic should be set as variable at that time); or fixing the harmonic, and adjusting the fundmental wave from small to large in step size (fundamental wave should be set as variable at tht time). The testing effects are basically the same.

Testing Mode

Before the test, you can amend the connecting mode of transformer of differential protection to be Y(Y0)／Y, and setting equilibrium factor of low (middle) voltge side to be 1, which will simplify the test. When doing the test, no matter only loading current on high voltage side or loading current on high and low voltage sides at the same time, its principle is as follows:

1,Component of fundamental wave output must be larger than the action threshold current set by protection;

2,Output initial harmonic content must be protected by reliable lock-out, which means it must be larger than the coefficient of harmonic control set by the protection.

If the connecting type of transformer of differential protection is Y(Y0)／△, and the equilibrium factor of high and low voltage side are all not 1, how to test the ratio control coefficient of protection under the condition of not amending settings?

-Outputting in the state of 'differential current of harmonic superposion on high voltage side'

Since component of harmonic and component of fundamental wave are all added on high voltage side, component of two kinds of waveforms influenced by equilibrium factor of high voltage are the same, they will be counteracted mutually. So its testing mode is as same as the statement of above paragraph. Please refer to it.

-Outputting in the state of 'harmonic on high voltage side, differential current on low voltage side'

You must consider respectively the equilibrium factor of high and low voltage sides.

For being convenient to explanation, we hereby suppose the equilibrium factor of high and low voltage sides are respectively Kh and K1, differential threshold value is Ido, and harmonic control coefficient is Kxb, then:

a) The output component of fundamental wave (suppose it is output by IB) must be larger than Id0／Kl;

b) The output initial harmonic content (suppose it is output by IA) must be larger than Id0＊Kxb＊Kh.

Start the test, and reduce harmonic in step size till differential action acts. Suppose the harmonic current and fundamental wave current output by tester is respectively IA1 and IB1 at that time, then the formula of computing the coefficient of harmonic control:

Kxb＝Ixb／Ijb＝(IA1/ Kh)／(IB1＊Kl)

hzjb-1200 6 Phase Relay Protection Tester

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