DC Protection Device Gradient Coordination Tester

DC Protection Device Gradient Coordination Tester

Specialized testing equipment for substation DC systems, professionally verifying the effectiveness of the differential coordination between upper and lower levels of DC protection devices.

Portable and easy to operate, highly automated, with accurate sampling, data can be archived and reports can be exported.

Suitable for DC 110V/220V power supply systems, meeting the requirements for on-site testing and pre-commissioning trials in substations.

The MOEORW-WSAC DC protection device differential coordination test system is specifically designed for substation DC systems, adaptable to field operation requirements, portable, easy to operate, and highly automated. It integrates predictive testing and short-circuit verification functions, employing upper and lower computer collaborative control for accurate sampling and efficient analysis. It can complete differential coordination verification of DC protection devices at different levels, automatically record and analyze data, and support report export, effectively avoiding the risk of cascading trips and ensuring the safe and stable operation of the DC power grid.

• Operating power supply: AC220V (voltage range: 100~264V), 47~63Hz
• Voltage rating: DC110V/DC220V
• Voltage accuracy: ±0.5%
• Current accuracy: ±1%
• Prediction accuracy: ±5%
• Current output response time: 1ms
• Time measurement accuracy: 1ms
• Delay time range: 0~1s
• Delay adjustment accuracy: 0.1s
• Recording resolution: 12 bits
• Device dimensions: 432*195*414 (length*width*depth mm)
• Maximum estimated current: 8000A
• Maximum short-circuit current withstand: 5000A

The entire system is divided into two parts: upper-level computer display and control, and lower-level computer execution and protection. A centralized control approach is adopted to improve system security and convenience.

1. It adopts a 100M data acquisition card and a VC development platform, with high sampling rate and high accuracy and reliability.
2. Computer-controlled, with a fully localized Chinese graphical interface, it is simple to operate and easy to use.
3. It has two working modes: low current prediction and short circuit verification.
4. It features a pure high-power resistive load with good linearity and high precision. The output regulation uses a high-power switching transistor to achieve contactless adjustment.
5. It can store large amounts of data (depending on hard drive capacity), enabling electronic archiving; it can print reports, quickly search historical records, and facilitate analysis.

This tester is suitable for DC power supply systems with voltage levels of DC110V and DC220V.