Description
Line protection relay REX 521 is designed for protection, control, measurement and supervision in medium voltage networks and for protection of medium to large three-phase AC motors in circuit breaker control motor drives. Typical applications include input, output and motor feeders and substation protection. In addition, the relay can be used for example as backup protection for power transformers and backup for high voltage line protection relays.
Protective relays provide excitation inputs to conventional current and voltage transformers. Hardware versions with current and voltage sensor inputs are also available.
The REX 521 Feeder protection Relay is further enriched with additional features to provide more effective protection, extended measurement functions, supervision, control functions and connectivity for your power network. REX 521 is primarily used in single bus solutions, using a circuit breaker for various protections.
Function description:
The REX 521 Feeder protection Relay is further enriched with additional features to provide more effective protection, extended measurement functions, supervision, control functions and connectivity for your power network. REX 521 is primarily used in single bus solutions, using a circuit breaker for various protections.
With prefabricated standard configurations, the device can be used in different types of networks. Typical applications include radially isolated neutral lines, resonant grounding, solid grounding, and incoming and outgoing lines in resistive grounding systems.
The scope of REX 521
Protection, control, measurement and supervision in medium voltage network, and protection of large and medium-sized three-phase AC motors
Advantage part model:
PHBAOT1500S100 | AB 80165-138 | PR6424/001-021 |
PHBBLK10000100 | AB 80165-078-52-R | PR6424/001-100 |
PHBBLK10010000 | AB 80165-018 | PR6424/119-121 |
PHBDIO4000R100 | AB 80160-077 | PR6424/119-000 |
PHBDOT1000S100 | AB 80157-072-51-R | PR6424/118-121 |
PHBIOR80010000 | AB 80156-783-63-R | PR6424/118-000 |
PHBRMU1000N100 | AB 80156-783-52-R | PR6424/117-121 |
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