Product Description
General Information
- Manufacturer: ABB
- Model/Part Number: REJ603BBB10NN3XC
- Description: The ABB REJ603BBB10NN3XC is a self-powered numerical relay designed for selective short-circuit and earth-fault protection in secondary distribution networks. It is primarily used in ring main units and secondary distribution switchgear within utilities and industries, especially for protecting small transformers. The relay operates without the need for an external auxiliary power supply, deriving its power from current transformers, making it ideal for remote locations where auxiliary power cannot be guaranteed.
Technical Specifications
| Specification | Details |
|---|---|
| Type | Self-Powered Feeder Protection Relay |
| Protection Functions | Non-directional overcurrent protection, earth-fault protection |
| Power Source | Powered by current transformers (self-powered) |
| Nominal Current | 1 A or 5 A (depending on configuration) |
| Operating Range | 0.1 to 40 times nominal current (In) |
| Tripping Characteristics | Definite time (DT) or inverse definite minimum time (IDMT) |
| Self-Supervision | Extensive monitoring of relay hardware and software |
| Interface | Front USB port for powering and accessing event/fault data |
| Environmental Rating | Designed for harsh environments, typically -25°C to +55°C |
| Application | Secondary distribution networks, ring main units, small transformer protection |
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