Product Overview
The ABB REX521 REX521GHHPSH04G is a comprehensive feeder protection relay engineered for medium-voltage power distribution systems. Designed for both directional and non-directional protection applications, it integrates multiple protection, control, measurement, and supervision functionalities into a single 件. It is suitable for a wide range / power systems including radial, isolated, and grounded networks.
Technical Specifications
| Parameter | Specification |
|---|---|
| Rated Frequency | 50 / 60 Hz |
| Current Inputs | 0.2 A / 1 A / 5 A |
| Voltage Inputs | 100 / 110 / 115 / 120 V |
| Sensor Input Voltage Range | 9.4 V RMS (±12 V peak) |
| Auxiliary Power Supply | 24–265 V AC/DC (PS_87H, PS_87L) |
| Digital Inputs | 9 inputs, 18–265 V DC |
| Power Outputs | Max 250 V AC/DC, up to 30 A for 0.5 s |
| Communication Protocols | SPA, IEC 103, Modbus, DNP 3.0, LON |
| Mounting Dimensions | 148.8 × 265.9 × 235 mm |
| 重量 | 5 kg |
| Operating Temperature | -10°C to +55°C |
| Storage Temperature | -40°C to +70°C |
| Enclosure Protection | IP54 (front), IP20 (rear) |
| Display | 2×16 character LCD |
Applications
The REX521 relay is designed for the protection / feeders in single busbar systems using one circuit-breaker. It supports various configurations including:
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Short-circuit and time overcurrent protection
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Directional and non-directional earth fault protection
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Thermal overload protection
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Voltage and frequency-based protection
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Circuit-breaker failure protection and auto-reclosing
It is suitable for:
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Radial isolated neutral networks
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Solidly earthed systems
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Resistive or resonant earthed systems
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Medium-voltage motor drives and transformers
Advantages
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Comprehensive Protection: Combines current, voltage, frequency, and thermal protection in one device.
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Flexible Configuration: 支持s multiple standard configurations (H01–H08, B01–B02, M01–M02).
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Communication Ready: Equipped with multiple protocol support for integration into SCADA and automation systems.
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Advanced Diagnostics: Includes circuit-breaker wear monitoring, transient recorder, and trip circuit supervision.
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User-Friendly: Easy configuration via CAP tools and front panel HMI.
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Compact Design: 保存s panel space with rack-mountable structure.
FAQ
1. What types / faults does the REX521 protect against?
The REX521 protects against overcurrent, earth faults (directional/non-directional), thermal overloads, voltage anomalies, and circuit-breaker failures.
2. Can this relay support automatic reclosing?
Yes, configurations like B02, M02, H01–H08 support 1 to 5 automatic reclosing shots.
3. What communication protocols are supported?
SPA, IEC 103, Modbus, DNP 3.0, and LON (in specific versions).
4. What is the operating temperature range?
The 件 operates between -10°C and +55°C and can be stored between -40°C and +70°C.
5. Is the relay suitable for motor protection?
Yes, especially in configuration H07 which includes motor-specific protections.
6. What voltage and current inputs does it support?
Voltage: 100–120 V; Current: 0.2 A / 1 A / 5 A.
7. How is the relay configured?
Configuration is done using ABB’s CAP501 or CAP505 tools.
8. Does it support remote control and monitoring?
Yes, through rear and front communication ports and integration into automation systems.
9. What are the enclosure protection ratings?
IP54 for the front side and IP20 for the rear side.
10. How many digital inputs and outputs are available?
It features 9 digital inputs, 3 power outputs, 2 signal outputs, and 1 IRF output.
Related REX521 / Similar ABB 型号s
| 型号 | Configuration Type | Protocols | Voltage Input | Dimensions (mm) | 重量 |
|---|---|---|---|---|---|
| REX521B01 | Basic Overcurrent & Earth | SPA, Modbus | 100 V | 148.8×265.9×235 | 5 kg |
| REX521B02 | With Auto-reclosing | SPA, Modbus | 100 V | 148.8×265.9×235 | 5 kg |
| REX521M01 | Directional Earth Fault | IEC103, DNP 3.0 | 100 V | 148.8×265.9×235 | 5 kg |
| REX521M02 | With Reclosing & DEF | IEC103, DNP 3.0 | 100 V | 148.8×265.9×235 | 5 kg |
| REX521H07 | Motor Protection | SPA, IEC103 | 100 V | 148.8×265.9×235 | 5 kg |
| REX521H08 | Advanced Voltage Protection | SPA, IEC103 | 100 V | 148.8×265.9×235 | 5 kg |
Popular ABB Relay 型号s
| 型号 | Application Area | Rated Voltage | Dimensions (mm) | 重量 |
|---|---|---|---|---|
| REF615 | Feeder Protection | 100–230 V | 177×229×195 | 4.5 kg |
| REM615 | Motor Protection | 100–230 V | 177×229×195 | 4.5 kg |
| RET615 | Transformer Protection | 100–230 V | 177×229×195 | 4.5 kg |
| REF620 | Feeder Automation | 100–230 V | 177×229×195 | 4.5 kg |
| REX640 | All-in-one Protection | Universal | 240×280×226 | 6.5 kg |
| REU611 | Voltage Regulation | 100–240 V | 170×200×170 | 3.5 kg |
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