Active Member
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[China]
Address: No.1207-1, Building #1, the National University Sci-Tech Park of Henan Province, No.11 Changchun Road, Zhengzhou, Henan 450000
Contact name:Tony Han
Zhengzhou Great Electric Co.,Ltd. |
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4 Phase voltage & 3 Phase current output Protection Relay Test Equipment With Fault Playback
Main Test of 4 Phase voltage & 3 Phase current output,
1.AC TEST
2.DC TEST
3.Harmonic Superposition Test
4.High-Low Frequency Test
5.Power Direction & Impedance Test
6.Synchronization Test
7.Full Group Test
8.Distance & Zero Sequence Protection
9.Characteristic of Impedance
10.Differential Protection
11.Differential Harmonic
12.Comprehensive Test of Line Protection of 6-35 KV Microcomputer
13.Fault Review
Technical Index of 4 Phase voltage & 3 Phase current output,
| AC current source | |
| Output accuracy | 0.5% |
| Output range | 3*(0-40A); 0-120A (three phases in parallel) |
| Phase current which can get long-time working 10A | |
| Maximum output power of phase current: 420VA | |
| Maximum output power of three phase current in parallel: 900VA | |
| Permissible working time (when three phase current in parallel to get maximum output): 10s | |
| Frequency (basic wave) range | 20-1000Hz |
| Harmonics times | 1-20 times |
| DC current source | |
| Output accuracy | 0.5% |
| Current output | 0-+/-10A per phase; 0-+/-30A (three phase in parallel) |
| Maximum load voltage output | 20V |
| Output accuracy | 0.5% |
| Phase voltage output | 4*(0-120V) |
| Line voltage output | 0-240V |
| Phase voltage/line voltage output power | 80VA/100VA |
| Frequency (basic wave) range | 20-1000H |
| Harmonics | 1-20 times |
| DC voltage source | |
| Output accuracy | 0.5% |
| Phase voltage output amplitude | 0-+/-160V |
| Line voltage output amplitude | 0-+/-320V |
| Phase voltage/line voltage output power | 70VA/140VA |
| Dimension | 400*300*180mm |
| Weight | approx 20KG |
| Power supply | AC 220V±10%,50／60Hz |
| Ambient temperature | -10℃ ～ +50℃ |
Switch signal and time measurement
| Switch signal input | 7circuits | Idle contact: 1～20mA,24V Potential contact access: “0”:0～ +6V； “1”:+11 V～ +250V |
| Switch signal output | 2 pairs | DC:220V／0.2A；AC:220V／0.5A |
| Time measure | Test range: 0.1ms ～ 9999s , accuracy 0.1mS Measurement range: 0.1ms ～ 9999s Measurement accuracy:0.1mS | |
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.
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 equipments. 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 layed elaborately and reasonably, it has enough large power redundancy and thermal capacity. The power amplifier circuit has overheat, 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.
