SC902 Microcomputer Relay Protection Tester

SC902 Microcomputer Relay Protection Tester

1.1 Main Technical Features
The main characteristics of the microcomputer based relay protection tester are as follows:
The classic Windows XP operating interface is user-friendly and easy to operate. In order to facilitate user use, a large number of keyboard shortcuts have been defined, making the operation "one click in place";
A high-performance embedded industrial control computer and an 8.4-inch high-resolution color TFT LCD screen can provide rich and intuitive information, including the current working status of the device, next step work prompts, and various help information;
Equipped with ultra-thin industrial keyboard and optical mouse, various operations can be completed through the keyboard or mouse just like operating a regular PC;
Equipped with an external USB interface, it can facilitate data access and software maintenance;
All projects can be tested without the need for external devices, automatically displaying and recording test data, and completing the depiction of vector diagrams and characteristic curves;
Using a high-performance D/A converter, the waveform generated has high accuracy, good linearity, and good transient response and amplitude frequency characteristics. Ensure waveform accuracy and other required indicators throughout the entire measurement range;
Using a unique algorithm, the generated waveform * is completely different from the waveform generation method of curve fitting, ensuring that the signal is a pure sine wave;
L can directly output AC voltage, AC current, DC voltage, DC current, with variable amplitude, phase, frequency, and 2-20th harmonic;
The power amplification part adopts a new high-power high fidelity linear power amplifier circuit, with high output power and low ripple interference. Each phase voltage can output 120V and current can output 40A. When the output current reaches 40A, the output power can reach 450VA/phase or above, and the waveform can still ensure no distortion or peak shaving;

In addition to providing traditional Ua, Ub, Uc, Ia, Ib, Ic, there is also a fourth voltage Ux output. Ux can be used for various functions, such as outputting various 3Uo, outputting the synchronous voltage of the line during line protection testing, etc;
L has 8 input ports and 4 pairs of output ports with open contacts. The input interface can automatically adapt to passive (air contact) and active inputs, and can automatically adapt to the polarity of active inputs. It can work normally within the input voltage range of ± 250V;
Provide various automatic testing software modules and GPS synchronization triggering tests (optional), etc;
The GPS synchronization triggering error is less than 50 μ S;
L can complete various complex verification tasks, conveniently test and scan various protection settings, and perform fault replay. Can store test data in real-time, display vector graphics, print reports, etc;
L adopts a carefully designed chassis structure, with small size, good heat dissipation, light weight, easy portability, and convenient flow testing;
The instrument has self-protection function, adopts a reasonably designed heat dissipation structure, and has reliable and complete multiple protection measures and power soft start, as well as certain fault self diagnosis and locking functions.

SC902 Microcomputer Relay Protection Tester

1.2 Main technical indicators
1.2.1 AC current source
Single phase output: 3 × 40A
Three phase parallel connection: 120A
lz·uiHigh output power: ≥ 400VA/phase
The amplitude, frequency, and phase of the output current of each phase can be independently adjusted
Output accuracy:
0.1A～0.5A：±10mA
0.5A～10A：±0.1%
10A～40A：±0.2%

Resolution:
0.1A～10A：5mA
10A～40A：10mA
Continuous output time:
Continuous output within the range of 0-10A
Continuous output time ≥ 60 seconds within the range of 10A to 20A
Continuous output time ≥ 10 seconds within the range of>20A
1.2.2 AC voltage source
Single phase output: 4 × 120V
lz·uiHigh output power: ≥ 60VA/phase
A voltage source with a shared neutral point for all four phases; The fourth voltage can be set as zero sequence voltage or any other setting
The output amplitude, frequency, and phase of each phase can be independently adjusted
Output accuracy:
1V～5V：±10mV
5V～120V：±0.2%
Resolution:
1V～10V：5mV
10V～120V：10mV
1.2.3 DC current source
Single phase output:- 10A～+10A
lz·uiHigh output power: ≥ 200VA
Output accuracy:
±0.5A～±1A：±10mA
±1A～±10A：±0.5%
Resolution:
±0.5A～±1A：5mA
±1A～±10A：10mA
1.2.4 DC voltage source
Single phase output:- 150V～+150V
lz·uiHigh output power: ≥ 100VA
Output accuracy:
±1V～±10V：±10mV
±10V～±150V：±0.5%
Resolution:
±1V～±10V：5mV
±10V～±150V：10mV
1.2.5 Angle of AC voltage and current source
Phase angle range: 0 °~360 °
Phase angle accuracy: ± 0.3 °
Phase angle resolution: 0.1 °
1.2.6 AC voltage and current source frequency
Frequency range: 1-2000Hz
Frequency accuracy:
1Hz～100Hz：±0.001Hz
100Hz～2000Hz：±0.01Hz
Frequency resolution: 1mHz
Capable of outputting harmonics of any amplitude from 2 to 20 times
1.2.7 Synchronization
Voltage and current synchronicity ≤ 10 μ S
1.2.8 Input volume
8-way independent switch contact input
Compatible with idle contacts and active contacts ranging from 15V to 250V, capable of automatically identifying the polarity of active contacts
Timing accuracy: ≤ 1mS when less than 1S
1.2.9 Output quantity
4 pairs of programmable switch air contact outputs
Contact capacity:
250VDC，0.5A
250VAC，0.5A
1.2.10 Power Supply
AC input voltage
Rated value: 220V ± 10%
Reference value: 220V ± 2%
AC power supply frequency:
Rated value: 50Hz ± 10%
Reference value: 50Hz ± 2%
1.2.11 Box size and weight
Box size: 360mm × 190mm × 420mm (W × H × D)
Weight: Approximately 20kg
1.2.12 Environmental conditions for use
Environmental temperature: - 10℃～+40℃
Relative humidity: ≤ 90%
Atmospheric pressure: 80-110kPa