Products Description
| Company Information | |||
| [email protected] | |||
| Mobile | +8613950166376 | ||
| +8613950166376 | |||
| 13950166376 |
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | ABB REX521 REX521GHHPSH04G Feeder Protection Relay |
| Rated Frequency | 50.0 / 60.0 Hz |
| Current Input (Rated) | 0.2 A / 1 A / 5 A |
| Voltage Input (Rated) | 100 V / 110 V / 115 V / 120 V |
| Voltage Input Withstand | 2 x Un (240 V continuous) |
| Power Supply Options | PS_87H (110–220 VDC / 110–240 VAC), PS_87L (24–60 VDC) |
| Auxiliary Voltage Variation | AC: 85–110% / DC: 80–120% of rated |
| Current Transformer Inputs | 4 (1/5 A), 1 (0.2/1 A) |
| Voltage Transformer Inputs | Up to 4 (depending on hardware version) |
| Sensor Voltage Range (RMS) | 9.4 V RMS |
| Sensor Voltage Peak | ±12 V |
| Input Impedance (Sensor) | >4.7 MΩ |
| Digital Inputs | 9 channels |
| Power Outputs | 3 power outputs, 2 signaling outputs, 1 high-speed power output |
| Breaking Capacity (PO @220VDC) | 1 A (signaling), 5 A (power outputs) |
| System Voltage | Max 250 V AC/DC |
| Communication Interfaces | RS-232, RS-485, Fibre Optic (SPA, IEC 103, Modbus, DNP 3.0, LON) |
| Memory/Recorder Capacity | 50 last events, 16 digital signals in disturbance recorder |
| Environmental Temperature | –10 to +55°C operating, –40 to +70°C storage |
| Enclosure Protection | Front: IP54 / Rear: IP20 |
| EMC Standards | IEC 60255-22 series, EN 61000-6-2, EN 55011, etc. |
| Dimensions (W x H x D) | 148.8 mm x 265.9 mm x 235 mm |
| Weight | 5 kg |
FAQ
FAQ
Q1: What systems is the ABB REX521 suitable for?
A1: The REX521 is suitable for single busbar systems in radial isolated, solidly earthed, resistance-earthed, and resonant-earthed networks.
Q2: What are the key protection functions of the REX521?
A2: It offers protection functions including three-phase overcurrent, earth fault (directional and non-directional), voltage, phase discontinuity, thermal overload, and motor start-up detection.
Q3: Does the REX521 support directional earth fault protection?
A3: Yes, directional earth fault protection is available in configurations M01, M02, H01 through H08.
Q4: What communication protocols are supported?
A4: The device supports SPA, IEC 103, Modbus, DNP 3.0, and LON protocols through RS-232, RS-485, and fiber optic ports.
Q5: What are the rated input voltage and current values?
A5: Rated current inputs are 0.2 A, 1 A, or 5 A; voltage inputs are configurable from 100 V to 120 V.
Q6: Will the relay retain settings after a power loss?
A6: Yes, the device retains all settings and event records in non-volatile memory after power loss.
Q7: Can the REX521 be used for motor protection?
A7: Yes, configuration H07 is designed specifically for protecting medium and large three-phase motors.
Q8: What is the ingress protection (IP) rating of the unit?
A8: The front side is rated IP54, and the rear terminal area is rated IP20, suitable for industrial installations.
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Packing & Delivery
We will use wear-resistant cartons to seal the boxes, and take photos for your confirmation before sealing. We will pack the boxes only after confirmation.
For express delivery, we will use DHL, UPS, TNT, FedEx and EMS.
Please rest assured that we have a deep cooperation with express delivery companies and can ensure that your goods are delivered to you in good condition.
