Ep Hipot Electric Eprp-204 Three Phase Relay Protection Tester (SCM)

Product Description

General Information:
Protection systems play a key role for the safe and reliable operation of today's electricity power systems. Properly working protection devices help to maintain the safety of the system and to safeguard assets from damage. EPRP-204 Relay Protection Tester is the essential test tool for relay protection technicians.

Main Features:
 

• Standard 4-phase voltage and 3-phase current output. With 4-phase voltage and 3-phase current output, it is convenient to carry out various combination outputs for various types of protection tests. The single-phase voltage can output up to 120V, the single-phase current can output up to 40A (10 seconds), the current three can output 120A, the fourth phase voltage Ux is a multi-function voltage item, which can be set to 4 types of 3U0 or check the same voltage, or Output at any certain voltage value.
• Single machine is easy to operate Single machine is operated by a convenient and flexible rotating mouse through the large-screen LCD display, all in English. It can complete most of the field test and verification work, can verify various relays and microcomputer protections, and can simulate various complex transient, permanent, and conversion faults for a whole set of tests. It can be used after booting, and the operation is convenient and quick.
• Dual operation mode, connected to the computer and running through a full set of English operating software on the Windows platform, can perform various large-scale, complex and more automated calibration tasks, can easily test and scan various protection settings, and can store tests in real time Data, display vector diagrams, draw fault waveforms, print reports online, etc.
• The software is powerful and can complete various large-scale and complex calibration tasks with high degree of automation, such as three-phase differential test, factory power quick cut, automatic switch-on test, line protection inspection and simultaneous reclosure, etc. It can easily test and scan various Protect the fixed value, perform fault playback, store test data in real time, display vector diagrams, print reports online, etc.

• Abundant switch contacts are 7-way contact input and 2 pairs of empty contact output. The input contacts are empty contacts and compatible with 0~250V potential contacts, which can be intelligently and automatically identified. The input and output contacts can be expanded according to user needs.
• Large-screen LCD display This machine adopts a 320×240 dot matrix large-screen high-resolution graphic LCD display. All operation processes are set on the display. The operation interface and test results are displayed in English, which is intuitive and clear.
• Self-protection It adopts a reasonably designed heat dissipation structure, and has a variety of reliable and complete protection measures, soft start of power supply, and certain fault self-diagnosis and blocking functions.
• With independent dedicated DC power output The device is equipped with a 110V and 220V dedicated DC power output.
• High cost performance It is a cross-professional joint design product that integrates advanced scientific and technological achievements from multiple disciplines. It combines the performance of a large-scale tester and the price of a small-scale tester, and has a high performance-price ratio.

Hardware Structure

• High-Performance Industrial Control Computer

High performance Industrial control computer is adopted as the controlling computer, through which you can run the windows operating system directly. 6.4"TFT true color LCD display, tracking ball and optimized keyboard are allocated on the faceplate of this tester, which can be used without the external mouse and keyboard. USB interface, 10-100M net mouth and serial communication interface are located on the back plate of this tester, through which you can access data, communicate data and upgrade software conveniently.
The whole process and the result of the test will all be showed on the LCD. The English operational interface of the complete set is very friendly and convenient. The tracking ball and keyboard on the faceplate will implement the operation. The operation is simple and convenient, and is easy to be mastered. Operator only needs a little knowledge of computer.
Keyboard and mouse interface are also allocated on the faceplate. If you would like to use the external mouse and keyboard, through pluging them with corresponding interfaces, you can operate this tester just like operate a desk-top computer.

• Digital Signal Processor Microcomputer

High-speed digital controlling processor is adopted as the output core of the tester. 32 bit double precision arithmetic is employed in the software, through which arbitrary high-accuracy waveforms of each phase can be produced. Since integrative structure is adopted, the structure of the tester is layed compactly. The distance of data transmission is short with tight structure, which overcome the problem of fewer points of waveform output due to long data communicational line and narrow frequency band when using the test controller controlled directly by PC.

 

• D/A Conversion and Low-Pass Filtering

High precision D/A converter is employed for ensuring the precision and linearity of current and voltage in the whole range.
Due to high density of fitting ponit, fidelity of waveform is high and harmonic component is small, which doesn't have a strict requirement on the low-pass filter. Consequently, it has good characteristics of transient, phase frequency and amplitude frequency, which is easy to perform accurate phase-shifting and harmonic superposition and ensures very high precision even when the frequency is high.
 

• Voltage and Current Amplifier

For phase current and voltage, we persist in adopting high performance linear amplifier output mode in order to make the current and voltage source to directly output all kinds of waveforms from the DC waveform to the waveforms including all kinds of frequency components, such as square wave, combined waveform overlapped by each order harmonic, fault transient waveform, etc. In addition, the output waveform is clear and smooth without high-frequency radiated interference with neighboring equipment. It can simulate well all kinds of current and voltage characteristics under the circumstance of short circuit fault.
For power amplifier circuit, we adopt import power parts with high-power and hi-fi module style as power output, combining with heat dissipation structure laid elaborately and reasonably, it has enough large power redundancy and thermal capacity. The power amplifier circuit has overheated, overflow, overvoltage, and short circuit protections. When overflow occurs in the current circuit and overload or short circuit occurs in the voltage circuit, it will limit the output power automatically, switch off the whole power amplifier circuit and give alarm signal. In order to prevent the overheat of the power amplifier for long time operating under large current, a software time terminating system under large current is set in this tester. It can work for a long period when outputting is 10A or below. When the current is over 10A, the tester will start up the software time termination order. When time is up, the software will forbid power output automatically and give alarm signal. The higher output current is, the shorter the limiting time will be.



Technical Specifications:
 

AC current output
Phase current output (effective value)	0~40A
Output Precision	0.2
The 3 phase parallel current output(RMS):	0~120A
The allowed working value when the phase current work long time (RMS):	10A
The maximum output power of phase current	450VA
The maximum output power when 3 phase parallel current output	900VA
The allowed working time when 3 phase parallel current maximum output	10S
Frequency range (fundamental)	20~1000Hz
Harmonic time	1~20 times
DC current output
Current output	0~±10A / phase      0~±30A / 3 parallel
Output precision	0.5
The maximum load voltage output	20V
AC voltage output
Phase voltage output RMS value:	0~120V
Output Precision	0.2
Line voltage output RMS value:	0~240V
The output power of phase voltage/ line voltage:	80VA / 100VA
Frequency range (fundamental)	20~1000Hz
Harmonic time	1~20 times
DC voltage output
The output amplitude of phase voltage:	0~±160V
Output Precision	0.5
Line voltage output range	0~±320V
Phase voltage / Line phase output power	70VA / 140VA
Binary & Time measuring
Binary input	7 channels
Idle contacts	1~20mA,24V
Potential contact access	"0": 0 ~ + 6V; "1": +11 V ~ + 250V
2 pairs binary output	DC:220V/0.2A, AC:220V/0.5A
Time measuring range	0.1ms~9999s
Measuring accuracy:	0.1mS
Power Source	AC 220V±10%,50/60Hz
Environmental temperature	-10ºC~+50ºC
Dimension	400×360×180mm³
Weight	22kg

More details on Relay Protection Tester EPRP Series please contact EPHipot, we have professional tech team to design correctly designed products and systems.