Protection Relay Test Set

HMJBC-1200 six phase protection relay test set uses the latest generation of high-speed DSP digital signal processor as the core and adopts dual 12-bit D/C, high output precision and good waveform, stable performance.

Protection Relay Test Set is convenient to test the Automatic bus transfer equipment and the microcomputer differential protection device,ａnd equipped with calibration procedures for various relays are targeted. The powerful functional test software can also provide a variety of verification and search methods for complete sets of microcomputer protection and automatic testing of automatic devices.

Test item contains Line protection, differential protection, impedance protection, low cycle, synchronization, automatic switching, etc. Various types of fault simulation programs can simulate and replay actual various types of faults, transient processes, system oscillations, and reclosing actions.

1.Output up to 6-phase voltage and 6-phase current, which can be combined to achieve conventional 4-phase voltage 3-phase current type, 6-phase voltage type, 6-phase current type, and 12-phase type output modes.

2.With High-performance embedded industrial control computer and 8.4" large-screen high-resolution color TFT LCD display，the protection relay test set can provide rich and intuitive information, including the current working status of the equipment, next-step work tips and various help information, etc.

3.The output end uses a high-fidelity, high-reliability modular linear power amplifier, with excellent performance. Will not produce high-frequency and intermediate-frequency interference to the test site, and ensure that the waveform is smooth and accurate throughout the whole process from large current to small current.

4.The output part is controlled by DSP, with fast calculation speed, strong real-time digital signal processing ability, and can control the conversion of high-resolution D/A. The output waveform has high precision, low distortion and good linearity. Adopting a large number of advanced technology and precision component materials, professional structural design, the device is small in size, light in weight, full-featured, easy to carry, convenient for on site test.

5.Protection Relay Test Set can complete various automatic, large-scale and complex calibration tasks.It can easily test and scan various protection settings, perform fault playback, store test data in real time, display vector graphics, and print reports online.

6.Protection Relay Test Set can complete various automated, large-scale and complex calibration tasks.It can easily test and scan various protection settings, playback fault, store test data in real time, display vector graphics, and print reports online.

7.With an independent 110V and 220V dedicated DC power output, convenient for on-site inspection and use.

8.The new generation of TP-60A protection relay test set is equipped with 10-channel open-in and 8-channel open-out, which is convenient for testing the Automatic bus transfer equipment.

9.Provide various automatic test software modules and GPS synchronization trigger test (optional), etc.

Microcomputer differential protection is a relatively complex protection, so you can't avoid coming across some problems during debugging. Generally the following points have significant influences on test result:

1、Setting equilibrium factor. Wrong equilibrium factor may lead to a large deviation between the curve tested and setting curve.

2、Selection of restraint formula. Wrong selection of restraint formula results in the testing curve and restraint coefficient calculated deviating from the setting value of protection, even completely wrong.

3、When doing the test by three-phase current, if compensating current does not be included, generally speaking ,if the first action point acts correctly, action points following it will act immediately after current is added. In this case, though the testing phase does not satisfy the condition of differential action, the differential current of compensating phase will exceed the setting value of differential action, so the protection will act quickly.

Harmonic Superposition Test

The ‘Harmonic Superposition’ Test unit can implement superposition output of each order harmonic component of 3 phase voltage and current, which is used for testing the working behavior of equipment of power system in all kinds of harmonic conditions. It is often used for verifying constraint coefficient of differential harmonic.

UA、UB、UC、IA、IB、IC can be overlapped DC and 2～20 order harmonic output.

Each component can be displayed and recorded according to amplitude, and it also can be displayed and recorded according to percentage of fundamental wave

You can select automatic variety or manual variety, and the amplitude and phase will all be changed.

It can measure action value, return value, action time and return time.

¢ Testing Parameters

Variable Option

Variable：Select the channel needed to change from the pulldown menu. In this diagram, A Phase voltage is selected to be variable.

Waveform: Represent harmonic change from DC to the 20th time harmonic.

Step Size of Amplitude Value：The step size here is also corresponding with ‘Harmonic Expressing Mode’. When ‘Express in amplitude value’ is selected, the step size can also be expressed by amplitude, and the unit is A or V; however, when selecting the ‘Express in percentage of fundamental wave’, step size is also the percentage.

Range and Time of Variation

Initial Value of Varitaion：The initial data of variation comes from the data of foregoing harmonic set, which could not be amended. If the initial value needs to be amended, you must do it on the page of harmonic data. The initial value here is expressed in the way of amplitude.

Upper Limit of Variety：It is the output upper limit value of variable, which can ensure the output value not to be very large and avoid ruining the tester.

Variation Time：Variation time stands for the interval of each step variation, and it is normally set to be slightly larger than the setting action time of protection.

Anti-Oscillating of Contacts： The default value is 5ms. When doing the relay test, you should set longer Anti-Oscillating time according to requirement.

Expressing Method of Harmonic

You can select ‘Express in the mode of amplitude’, and also can select ‘Express in percentage of fundamental wave’ to express data of harmonic component of each phase. When ‘Express in percentage of fundamental wave’ is selected, the data of each order harmonic on the page of ‘harmonic’ will be displayed the percentage related to the amplitude of fundamental wave. The step size of amplitude of variable will also be expressed in the percentage of fundamental wave. For example, when the ‘Express in amplitude value’ is selected, amplitude of the second order harmonic of certain phase voltage is 2V and the amplitude of fundamental wave is 10V, then the second order harmonic displayed is 20% when selecting ‘Express in percentage of fundamental wave’.

Set Digital Quantity

The page of digital quantity is used for defining the action of which channel is effective. It defaults that digital quantity of all seven channels A、B、C、R、a、b、c are effective. When doing the test, you can define the digital quantity of which channel is effective (tick ‘√’ means effective). Relation of each is ‘or’.

Way of Variation

Here Manual Operation and Automation (automatically increase and decrease) two kinds of variation are available for implementing change to harmonic components of each phase during the test.