Industrial PC Relay Protection Tester
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, wide transmission bandwidth, and can generate a high-density fitting sine wave of 500 points per cycle for the fundamental wave. The output waveform is smooth with 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 fitting waveform accuracy and good linearity. It can output 12 analog signals simultaneously, meeting the *testing requirements of 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 precision and good reliability, it simultaneously outputs 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. The operation interface and test results are displayed in Chinese, and all operation processes are 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. Only AC 220V power supply is needed, and it 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 group 110VDC/1.0A, the other group 220VDC/0.6A. They are automatically output simultaneously at power-on and can be used as protection power supply without software settings or adjustments.
6. Intelligent self-protection
Adopts a newly designed heat dissipation structure to ensure good ventilation. It can simultaneously detect overcurrent, overvoltage, overload, short circuit, excessive temperature, abnormal data, and other phenomena that endanger the safety of 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's alarm indicator light turns red and the power amplifier is automatically cut off.
7. Rich contacts and powerful software functions
This device has eight channels of switch quantity input (A B C R a b c r) and 4 channels of switch quantity output. 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, and all interfaces are displayed in Chinese. It can complete the verification work of most field tests. It can also conveniently complete protection device tests from foreign manufacturers such as ABB, Siemens, AREVA, etc.
The device can be placed vertically or horizontally, can be operated offline, or connected to an external PC for operation. Test results can be automatically organized and recorded as test reports for future reference. They can also be saved directly using a USB drive and conveniently transferred to an external PC for editing, printing, and other processing. Software upgrades are simple and fast, directly via USB drive upgrade or download from an external PC, without changing any hardware.
The software has powerful auxiliary calculation functions, which can automatically calculate positive, negative, and zero sequence voltages and currents, 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.
8. Special design for railway use
Specially designed electric railway differential test menu, based on the working principle of electric railway traction transformer differential protection, automatically tests the percentage restraint characteristics of the transformer.
9. Per-phase differential test menu
According to the working principle of transformer differential protection, automatically tests the transformer's percentage restraint characteristics, harmonic restraint characteristics, and DC magnetizing characteristics.
Precautions
1. The tester has a built-in industrial PC and Windows operating system. Please do not turn the host power on and off too frequently.
2. The device panel or back panel is equipped with USB ports, allowing hot-plugging of USB devices (such as USB drives), but be sure to do so after data transfer is complete.
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 drive, or desktop icons. If you really need to store data on this machine, please store it on the D drive. When using a USB drive to copy data, ensure the USB drive is clean and virus-free, and do not use the USB drive to install other software programs on 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 output errors that may cause protection misoperation.
6. The input channels are compatible with dry contacts and potential (0~250VDC). When using live contacts, the high potential (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 chassis. Generally, place the instrument upright or open the support feet and place it slightly tilted.
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, reliably ground the ground terminal of the power cord (3-core) or the device's grounding hole.
10. If problems such as interface data errors or device connection failures occur during use, you can solve them as follows: press the reset button downward to reset the DSP; or exit the running program and return to the main menu, then restart the program, and all interface data will be restored to default values.
Technical Specifications
AC voltage output
0~250V continuously adjustable, maximum output capacity 600VA, over-range protection 260V
