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Protection Relay ABB REX521EHHPSH05E for Grid Safety
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ABB REX521EHHPSH05E
Versatile multi-function protection relay engineered for reliable safeguarding of feeders, motors, generators and transformers in utility and industrial power networks.
| Brand | ABB |
| Model | REX521EHHPSH05E |
| Voltage | 110-240V AC / 110-220V DC auxiliary |
| Country of Origin | Sweden |
| Weight | 3.5 kg |
| Dimensions | 190 x 180 x 220 mm |
| Certifications | CE, IEC 60255, UL, EN 50178 |
| SKU / MPN | REX521EHHPSH05E |
| What’s in the box | REX521 relay unit, mounting brackets, terminal connectors, user manual, test certificate |
| Protection Functions | Overcurrent, earth-fault, differential, distance, motor and generator protection |
| Communication | IEC 61850, Modbus, DNP 3.0, SPA, LON |
| Auxiliary Voltage | 110-240V AC / 110-220V DC |
| Binary Inputs/Outputs | 8 BI / 8 BO (programmable) |
| Analog Inputs | 4 CT + 4 VT channels, 1A/5A CT, 100-120V VT |
| Mounting | Panel or 19" rack mount, 4U height |
Key benefits: Comprehensive protection library, IEC 61850 communication, wide auxiliary voltage range, robust metal housing, proven field reliability, easy configuration via HMI or PCM600 tool
Typical applications: Substation feeder protection, transformer differential protection, motor and generator protection, industrial power distribution, utility distribution networks, backup protection schemes
Lifecycle: Mature product, replacement recommended with REF615/REF630 series, ABB service and spares still available
1 review for Protection Relay ABB REX521EHHPSH05E for Grid Safety
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Daniel W. –
Good quality sensor, accurate readings. Will order more for our production line.