NARI Technology NSR661RF-D Motor Protection Measurement and Control Device

1 Overview
1.1 Product Features
1. The bay-level device adopts a high-performance hardware platform with a 32-bit RISC processor, offering powerful functionality.
2. Utilizes high-reliability industrial-grade components as the main body, employing automatic monitoring and compensation technologies to enhance hardware circuit stability and reliability.
3. Enclosed, reinforced unit chassis with vibration resistance and multi-layer anti-interference design, suitable for extremely harsh environments. The 6U chassis can be distributed and installed on switchgear for operation.
4. Analog circuits use high-precision, wide-range components without amplitude or phase adjustment circuits. Amplitude and phase adjustments are handled by software functions, making the circuit simple, reliable, drift-free, and reducing debugging and maintenance efforts.
5. Large-screen LCD display with an intuitive and user-friendly interface menu, providing detailed and clear information for convenient operation and debugging.
6. Modular design and structure with strong expandability.
7. The device is equipped with comprehensive protection sections and outputs, fully leveraging the advantages of microprocessor-based protection and greatly facilitating user operation.
8. High-speed sampling and real-time parallel computing. Completes all protection logic measurements and calculations at each sampling point, along with real-time organization of fault reports and event records.
9. Remote control of circuit breakers and soft壓板 (soft panels), with remote operation records and statistics.
10. Comprehensive device self-check strategy.

Protection Function Parameters
1. Accurate Operating Range
Current: 0.05In~20In
Voltage: 0.25V~130V (same for phase and line)
Frequency: 45Hz~55Hz
Rate of change of frequency: 0.3Hz/s~10Hz/s
Time delay: 0~100s
2. Comprehensive Analog Error
Current: ≤2.5% or 0.01In, whichever is greater
Voltage: ≤2.5% or 0.1V, whichever is greater
Frequency: ≤±0.01Hz
Time synchronization accuracy: ≤1ms
Event recording resolution: ≤1ms
3. Setting Accuracy
Current and voltage setting error: ≤±3%
Frequency setting error: ≤±0.01Hz

Frequency slip setting error:≤±0.1Hz/s

Synchronism check angle setting error:≤±2°

Other setting errors:≤±5%

Directional element boundary condition: ≤±5°

When the excitation quantity is ≥1.2 times the setting value, instantaneous operation section operating time:≤35ms

Time delay operation section operating time discrete error:≤30ms

Return time for each protection section:≤25ms