| Industrial PC Relay Protection Tester |
Industrial PC Three-Phase Relay Protection Tester Instrument Features:
1. Embedded host, equipped with ultra-large-scale programmable logic device (CPLD)
The host adopts a high-speed high-performance embedded microcomputer system equipped with CPLD, with fast response speed and wide transmission bandwidth. It can generate a high-density fitted sine wave of 500 points per cycle for the fundamental wave, with smooth output waveform and no harmonic components. Due to the large number of output points and precise filtering circuits, the waveform distortion is extremely small.
When outputting harmonics, even for the 9th harmonic at 450Hz, a high density of 55 points per cycle can be achieved. The software has strong human-machine dialogue and online help functions, and can control any test parameter.
2. Single machine with 12-channel D/A simultaneous output
Uses 16-bit high-precision DAC chips to ensure high waveform fitting accuracy and good linearity. It can output 12 analog signals simultaneously, meeting the testing needs for transformer protection, standby power supply automatic switching, etc.
3. High-precision linear power amplifier, simultaneously outputting 6-phase voltage and 6-phase current
The carefully designed voltage and current amplifiers achieve AC/DC sharing, and the output stage adopts a unique high-precision ultra-linear amplification technology. With high accuracy and good reliability, it can simultaneously output 6-phase AC voltage and 6-phase AC current. Each phase AC voltage output is up to 130V, 70VA, and the AC current full parallel output is up to 180A.
DC voltage output can reach 300V, 130VA.
4. Large-screen LCD, complete interfaces, integrated single-chassis structure
This machine uses a 640×480 dot matrix 8.0" large-screen high-resolution graphic LCD, with all operation interfaces and test results displayed in Chinese. The entire operation process is set on the display screen, which is intuitive and clear.
The device can be operated with its own keyboard, and also provides external keyboard/mouse ports. It also provides 2 USB ports and 2 RS232 ports for communication with external computers and other devices. It only needs AC 220V power supply and can work immediately after power-on. It is portable and very suitable for mobile testing and field work.
5. Auxiliary DC source (optional)
This machine can be optionally equipped with two independent DC power supplies, one 110VDC/1.0A and the other 220VDC/0.6A, which automatically output simultaneously when powered on. They can be used as protection power supplies without software settings or adjustments.
6. Intelligent self-protection
Adopts a newly designed heat dissipation structure to ensure ventilation. It can simultaneously detect overcurrent, overvoltage, overload, short circuit, excessive temperature, data anomalies, and other phenomena that endanger the device itself. Even operational errors will not damage the device. In addition, when dangerous signals such as external voltage enter the tester through terminals,
the device alarm indicator light turns red and automatically cuts off the power amplifier.
7. Rich contacts and powerful software functions
This device has eight switch inputs (A B C R a b c r) and 4 switch outputs. The input contacts are compatible with both dry contacts and 0-250V potential contacts, and can be intelligently identified. The device is operated through the large-screen LCD using 23 keys on the panel, with all interfaces displayed in Chinese.
It can complete the calibration work of most on-site tests.
The device can be placed vertically or horizontally, can be operated offline, or can be operated with an external PC. Test results can be automatically organized and recorded as test reports for future reference, and can also be saved directly to a USB drive for convenient transfer to an external PC for editing, printing, and other processing. Software upgrades are simple and fast, directly via USB drive or downloaded from an external
PC, without changing any hardware.
The software has powerful auxiliary calculation functions, automatically calculating positive, negative, and zero sequence voltage and current, primary and secondary active power, reactive power, and power factor.
The 6-phase voltage and 6-phase current outputs can perform dual-group tests for standby power supply automatic switching and three-phase differential tests for transformers, with very simple wiring.
Industrial PC Three-Phase Relay Protection Tester Instrument Applications:
1. Testing of all individual components in secondary dispatch (current, voltage, time, differential, balance, negative sequence, distance, power direction, inverse time, frequency, synchronization, reclosing relays, etc.).
2. Complete set transmission, able to simulate various simple or complex transient, permanent, and converting faults, and can superimpose transient DC components on the fundamental wave.
3. Can arbitrarily superimpose various harmonics, with online controllable initial angle and content.
4. Can output different frequency AC quantities per phase, dual-use for AC and DC.
5. Dedicated low-frequency unit for convenient testing of microcomputer low-frequency and low-voltage load shedding protection.
6. Automatic scanning of various protection time characteristics. Scanning of power and impedance protection characteristic curves.
7. Automatic testing of differential ratio and harmonic braking characteristics for microcomputer main transformer protection.
8. Automatic testing of complete distance, zero sequence, and overcurrent protection.
9. User-programmable test units to meet special test purposes, such as testing of standby power supply automatic switching devices.
10. Testing of various protections such as motor loss of excitation, out-of-step, reverse excitation, reverse power, and synchronization.
Technical Parameters:
1. AC voltage output: 0~250V continuously adjustable, maximum output capacity 1000VA
2. AC current output: 0~20A, 0~100A continuously adjustable. At 0~20A, open circuit voltage 5V; at 0~100A, open circuit voltage 10V
3. DC voltage output: 0~300V continuously adjustable, maximum 3A
4. DC current output: 0~200mA, 0~5A continuously adjustable. At 0~200mA, open circuit voltage 48V; at 0~5A, open circuit voltage 24V
5. Digital millisecond meter: maximum range: 100 seconds, resolution: 0.001 seconds, accuracy: 0.01% ± 2 digits
6. Overall measurement accuracy: 0.5 level
7. Dimensions: 420×310×160, 8. Weight: 16kg
Precautions:
1. The tester device has a built-in industrial PC and Windows operating system. Please do not frequently switch the host power on and off.
2. The device panel or back panel is equipped with USB ports, allowing hot-plugging of USB devices (such as USB drives), but note that plugging and unplugging must be done after data transmission is completed.
3. The device is equipped with a dedicated self-restoring CF card to avoid operating system damage caused by illegal shutdown, deletion or modification of files on the hard disk, and desktop icons. If you really need to store data on this machine, please store the data on the D drive. When using a USB drive to copy data, please ensure that the USB drive is clean and virus-free, and do not use the USB drive to install other software programs in this system.
4. When connecting an external keyboard or mouse, do not plug into the wrong port, otherwise the Windows operating system may not start normally.
5. Do not turn off the power directly in the output state to avoid protection misoperation due to incorrect output when turning off.
6. The input contacts are compatible with dry contacts and potential (0~250VDC). When using live contacts, the high potential end (positive) of the contact should be connected to the common terminal COM.
7. When using this instrument, do not block or seal the ventilation openings of the device. Generally, place the instrument upright or open the support feet to tilt it slightly.
8. It is forbidden to introduce external AC or DC power into the voltage and current output jacks of the tester. Otherwise, the tester will be damaged.
9. If the on-site interference is strong or safety requirements are high, before testing, please reliably ground the ground terminal of the power cord (3-core) or the device grounding hole.
10. If problems such as interface data errors or device connection failures occur during use, you can solve them by pressing the reset button downward to reset the DSP; or exit the running program to return to the main menu and restart the program, then all data on the interface will be restored to default values.
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