The ABB DSPU131 3BSE000355R1 Medium and High Voltage Interface Module is a critical component in power automation and protection systems, designed to ensure safe and reliable operation in electrical substations and industrial power networks.
Here’s its detailed technical profile:
1. Core Functions
Voltage Monitoring & Signal Conditioning:
Interfaces with medium/high-voltage (MV/HV) sensors (e.g., PTs, CVTs) to measure AC voltages up to 400kV
Converts high-voltage inputs to standardized low-level signals (e.g., 0-10V, 4-20mA) for protection relays and SCADA systems
Protection & Control Integration:
Provides galvanic isolation (≥2.5kV AC) between primary HV circuits and secondary control systems
Enables fast fault detection (<10ms) for overvoltage/undervoltage conditions
Redundancy & Diagnostics:
Supports dual-redundant power supplies (24-48V DC) for mission-critical applications
Self-monitoring with LED alarms for insulation degradation or signal loss
2. Technical Specifications
Input Range: 50-400kV (via external sensors), 50/60Hz frequency compatibility
Accuracy: ±0.5% of full scale (typical)
Response Time: ≤8ms for step changes
Environmental: Operates at -40°C to +85°C (IEC 61850-3 compliant)
3. Key Features
Modular Design: Hot-swappable for maintenance without de-energizing HV systems
Protocol Support: IEC 61850, DNP3.0, and Modbus for seamless grid automation
Surge Protection: Built-in transient voltage suppressors (TVS) for lightning/switch surges
This module ensures ABB’s trademark reliability in harsh electrical environments while enabling digital transformation in power infrastructure.
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