MHWGK-HI Microcomputer Relay Protection Tester (Industrial Control Computer)

1、 Product Introduction:

1. This device uses a high-speed and high-performance digital control processor as the control microcomputer, and applies a dual precision algorithm on the software to generate high-precision waveforms of any phase. Due to the use of an integrated structure, the various parts are tightly combined, the data transmission distance is short, and the structure is compact. Overcoming the problem of fewer output waveform points caused by long data communication lines and narrow frequency bands in laptop controlled measurement and control instruments.
2. Adopting high-speed high positionD/AThe converter ensures the accuracy and linearity of current and voltage across the entire range.
due toD/AHigh resolution and fitting density, low waveform distortion, small harmonic components, low requirements for low-pass filters, thus having good transient characteristics, phase frequency characteristics, and amplitude frequency characteristics, easy to achieve precise phase shifting and harmonic superposition, and can also ensure high accuracy at high frequencies.
3. The current and voltage of each phase do not use current and voltage boosters, but adopt direct output mode, so that the current and voltage sources can directly output waveforms from DC to various frequency components, such as square waves, combined waveforms of various harmonics, fault transient waveforms, etc., which can simulate the current and voltage characteristics of various short-circuit faults well.
4. The power amplifier circuit adopts imported high-power high fidelity modular power devices as the power output stage, combined with carefully and reasonably designed heat dissipation structure, with sufficient power redundancy and thermal capacity. The power amplifier circuit has complete protection against overheating, overcurrent, overvoltage, and short circuit. When overcurrent occurs in the current circuit, overload or short circuit occurs in the voltage circuit, the output power is automatically limited, the entire power amplifier circuit is turned off, and an alarm signal is displayed. To prevent overheating of the power amplifier circuit caused by long-term operation under high current, the device has set a software time limit for high current.10AThe device can operate for a long time when the output is below or above, and when the current exceeds10AWhen the time limit is reached, the software will automatically turn off the power output and give an alarm indication. The larger the output current, the shorter the time limit.

2、 Product features:

1. Flexible combination of voltage and current output

Three phase single-chip model/Three phase industrial control models have4phase voltage3The phase current output can be easily combined for various types of protection tests. Each phase voltage can output120VCan output three currents in parallel120A， 第4phase voltageUxAs a multifunctional voltage item, it can be set as4plant3U0Or check the voltage of the same period, or output any voltage value.

2. Convenient standalone operation

The single machine is operated by a convenient and flexible rotating mouse through a large LCD screen, with all Chinese displayed. It can complete most of the on-site testing and verification work, verify various relays and microcomputer protections, and simulate complex instantaneous, permanent, and conversion faults for whole group testing. Ready to use upon startup, easy and fast to operate.

3. New high fidelity linear amplifier (six phase industrial control model)

The output end of the six phase industrial control model has always insisted on using high fidelity and high reliability modular linear amplifiers instead of switch type amplifiers, which have excellent performance. It will not cause high or medium frequency interference on the test site, and ensures smooth waveform accuracy from high current to low current throughout the entire process.

4. High performance host (six phase industrial control model)

The output part of the six phase industrial control model adoptsDSPControl, fast computation speed, strong real-time digital signal processing capability, wide transmission bandwidth, high-resolution controlD/Atransformation. The output waveform has high accuracy, low distortion, and good linearity. The device adopts a large number of advanced technologies and precision component materials, and has undergone specialized structural design, resulting in small size, light weight, comprehensive functions, easy portability, and can work immediately after startup. Flow testing is very convenient.

5. Dual operation mode, connected to a computer for operation

passWindowsThe complete set of Chinese operating software on the platform can perform various large-scale, complex, and highly automated verification tasks. It can conveniently test and scan various protection settings, store test data in real time, display vector graphics, draw fault waveforms, and print reports online.

6. Powerful software functionality

It can complete various large-scale complex verification tasks with high automation level, such as three-phase differential test, plant power fast switching, backup automatic switching test, line protection check synchronous reclosing, etc. It can conveniently test and scan various protection settings, perform fault playback, store test data in real time, display vector graphics, and print reports online.

7. Rich switch contacts

8Road contact input and4Output to the air contact point. Input contacts are null contacts and0～250VPotential contacts are compatible and can be intelligently and automatically identified. The input and output contacts can be expanded according to user needs.

1. self-protection

   Adopting a well-designed heat dissipation structure, with reliable and comprehensive protection measures, power soft start, and certain fault self diagnosis and locking functions.

   9. Equipped with independent dedicated DC power output

   The device is equipped with one channel110Vand220VDedicated adjustable DC power output.

   10. cost-effective

   It belongs to cross disciplinary joint design products, integrating advanced technological achievements from multiple disciplines. Combining the performance of a large testing instrument with the price of a small testing instrument, it has a high cost performance ratio.

   IIIProduct Technical Parameters:

   1. AC current output：

   output accuracy： 0.2level

   Phase current output (effective value)： 0～40A

   Triple current output (effective value)： 0～120A

   Long term allowable operating value (effective value) of phase current： 10A

   Maximum output power of phase current ： 450VA

   Maximum output power at maximum output of triple current： 900VA

   Allowable working time at maximum output of triple current： 10s

   Frequency range (fundamental wave)： 0～1000Hz

   harmonic order： 0～20 time

   2. DC current output：

   output accuracy： 0.5level

   current output： 0～±10A /phase

   Maximum output load voltage： 20V

   3. AC voltage output：

   output accuracy： 0.2level

   Phase voltage output (effective value)： 0～120V

   Line voltage output (effective value)： 0～240V

   phase voltage/Line voltage output power： 80VA / 100VA

   Frequency range (fundamental wave)： 0～1000Hz

   harmonic order： 0～20time

   4. DC voltage output：

   output accuracy： 0.5level

   Phase voltage output amplitude： 0～±160V

   Line voltage output amplitude： 0～±320V

   phase voltage/Line voltage output power： 70VA / 140VA

   5. Measurement of switch quantity and time

6. Weight and Volume：

weight ：19.8kg(Single machine)

volume ：43.5cm*43cm*21cm