Excellent PLC
| Company Information | ||||||||
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| Mobile | +8613666033393 | |||||||
| +8613666033393 | ||||||||
| 13666033393 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Product Overview
The ABB REX010 Earth Fault Protection Unit is a compact, intelligent protection device designed for low and medium-voltage systems. It offers reliable earth fault detection, ensuring the safety and integrity of electrical networks. This unit is especially effective in applications where fast and selective earth fault protection is crucial.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Earth Fault Protection Unit |
| Model | REX010 |
| Rated Voltage | 24–220 V DC / 24–230 V AC |
| Frequency Range | 45–65 Hz |
| Operating Temperature | -25°C to +55°C |
| Storage Temperature | -40°C to +70°C |
| Mounting Type | Flush or surface mounting |
| Response Time | < 30 ms |
| Communication Protocol | Modbus RTU (RS-485) |
| Degree of Protection | IP20 (Front), IP10 (Rear) |
| Dimensions (W x H x D) | 254 x 203 x 53 mm |
| Weight | 3.5 kg |
Applications
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Power distribution networks
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Substations
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Industrial electrical systems
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Renewable energy systems
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Generator and transformer protection
Key Advantages
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Fast and accurate earth fault detection
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Compact design for flexible installation
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User-friendly interface and settings
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Remote monitoring via Modbus
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High reliability and long operational life
FAQ
Q1: What is the primary function of the REX010 unit?
A1: It detects and isolates earth faults in electrical systems to prevent equipment damage and ensure safety.
Q2: Can REX010 be used in both AC and DC systems?
A2: Yes, it supports both AC and DC control voltages.
Q3: Does the unit support remote communication?
A3: Yes, it uses Modbus RTU over RS-485 for remote monitoring.
Q4: What is the typical response time for fault detection?
A4: Less than 30 milliseconds.
Q5: Where is this unit typically installed?
A5: In switchgear panels, control cabinets, or substation panels.
Q6: Is the REX010 suitable for outdoor use?
A6: No, it is intended for indoor installations with adequate enclosure protection.
Q7: Can the device be panel-mounted?
A7: Yes, it supports flush or surface mounting options.
Q8: What protections does the unit offer aside from earth fault?
A8: It focuses solely on earth fault protection.
Q9: Is the configuration process complicated?
A9: No, it has a straightforward setup with clear parameter menus.
Q10: What is the operating temperature range of the unit?
A10: From -25°C to +55°C.
Related or Similar Models
| Model | Description | Dimensions (mm) | Weight |
|---|---|---|---|
| REX521 | Feeder Protection Relay | 258 x 206 x 54 | 3.7 kg |
| REF601 | Feeder Protection, Compact Unit | 220 x 180 x 50 | 2.9 kg |
| REJ601 | Motor Protection Relay | 220 x 180 x 50 | 2.8 kg |
| REX640 | Advanced Protection Relay | 270 x 212 x 60 | 4.0 kg |
| REU615 | Voltage Protection Relay | 260 x 200 x 55 | 3.6 kg |
| REL670 | Line Protection IED | 275 x 215 x 65 | 4.5 kg |
Popular ABB Models
| Model | Description | Dimensions (mm) | Weight |
|---|---|---|---|
| REF615 | Feeder Protection IED | 261 x 197 x 60 | 3.4 kg |
| RET670 | Transformer Protection Relay | 276 x 219 x 65 | 4.8 kg |
| REM615 | Motor Protection IED | 260 x 198 x 58 | 3.5 kg |
| REU611 | Voltage Protection IED | 250 x 190 x 50 | 3.2 kg |
| REX521 | Feeder Protection Relay | 258 x 206 x 54 | 3.7 kg |
| REL650 | Line Protection Relay | 268 x 210 x 60 | 4.3 kg |
