ABB REJ511 Earth-Fault Protection Relay
ABB REJ511 Earth-Fault Protection Relay Supplier and Exporter in India
ABB REJ511 Legacy Earth-Fault Relay – Price and Availability
ABB REJ511 is a numerical earth-fault protection relay used for busbars, feeders and other medium-voltage applications requiring non-directional earth-fault protection. For price and availability, send the complete part number, nameplate, quantity and destination country.
Description
ARP IMPEX supplies and exports ABB REJ511 earth-fault protection relays for substations, industrial distribution systems and existing protection panels.
REJ511 is designed specifically for non-directional earth-fault protection. The relay measures neutral current through a current transformer and operates when the earth-fault current exceeds the set value. It can trip the circuit breaker, provide alarm signals and record fault information according to the selected settings.
The relay has two earth-fault stages: a low-set stage for sensitive fault detection and a high-set stage for faster operation at higher fault currents. This makes REJ511 suitable for basic earth-fault protection of medium-voltage feeders and busbars in utility substations and industrial electrical systems.
REJ511 is a simpler protection relay than later multifunction ABB feeder relays. Its main job is earth-fault detection, which is also why old REJ511 units are still identifiable in protection panels where a dedicated earth-fault relay was originally installed.
For ABB REJ511 price and availability, send the complete ABB order number and a clear photograph of the existing relay nameplate.
Technical Specifications
- Brand: ABB
- Model: REJ511
- Product type: Earth-fault protection relay
- Product status: Legacy / not active since 2009
- Main application: Non-directional earth-fault protection
- Current inputs: 0.2 A / 1 A
- Rated frequency: 50 Hz or 60 Hz, selectable
- Low-set earth-fault stage: Available
- Low-set characteristic: Definite-time or IDMT
- High-set earth-fault stage: Available
- High-set characteristic: Instantaneous or definite-time
- Circuit-breaker failure protection: Included
- Disturbance recorder: Included
- Binary input: Galvanically isolated
- Communication: Optical PC interface
- Self-supervision: Continuous hardware and software monitoring
The complete ABB order code should be checked when sourcing an existing REJ511 because the auxiliary supply and hardware revision are identified in the product code.
Features
- Non-directional earth-fault protection
- Sensitive low-set earth-fault stage
- High-set earth-fault stage
- Definite-time operation
- IDMT operation on the low-set stage
- Circuit-breaker failure protection
- Disturbance recording
- Fault and event information
- Configurable trip and signalling outputs
- Optical communication for relay settings
- Settings stored in non-volatile memory
- Continuous internal self-supervision
REJ511 keeps the protection arrangement fairly straightforward. It is mainly suited to installations that need a dedicated earth-fault relay rather than a large multifunction protection package.
Applications
ABB REJ511 can be used for:
- Medium-voltage feeder earth-fault protection
- Busbar earth-fault protection
- Industrial power distribution
- Utility substations
- Cable feeder earth-fault protection
- Neutral-current supervision
- Non-directional earth-fault schemes
- Backup earth-fault protection
- Existing ABB protection panels
- Switchgear protection systems
- Two-stage earth-fault protection
ABB specifically identifies REJ511 for basic protection of busbars and feeders in utility substations and industrial power-distribution systems.
ABB REJ511 Order Code
ABB documentation gives REJ511A 401-BAA as an example order number.
The order code identifies items such as:
- Relay type
- Hardware revision
- Analogue interface
- Digital input voltage
- Auxiliary supply arrangement
For an existing relay requirement, send the complete REJ511 code exactly as shown on the marking strip or nameplate. This is more useful than requesting only “ABB REJ511”.
Related ABB REJ Protection Relays
ABB documentation for this older numerical relay range also references related models including:
- ABB REJ511
- ABB REJ513
- ABB REJ515
- ABB REJ521
- ABB REJ523
- ABB REJ525
REJ511 itself is a specific earth-fault relay rather than a configurable family with C1/C2/C3-type versions.
ABB REJ511 Legacy Spare Availability
ABB REJ511 is no longer an active product. ARP IMPEX can assist with enquiries for:
- ABB REJ511 part-code checking
- Existing relay identification
- Legacy spare availability
- Failed REJ511 replacement requirements
- Single-unit enquiries
- Multiple-quantity requirements
- ABB technical documentation
- Export packing
- International shipping
For an ABB REJ511 spare or replacement enquiry, please send:
- Complete ABB REJ511 order code
- Clear relay nameplate photograph
- Quantity
- Destination country
- Required delivery date
Why Buy ABB REJ511 from ARP IMPEX?
ARP IMPEX supplies ABB protection relays for utilities, industrial plants, EPC contractors, panel builders, maintenance companies and electrical traders.
We can help with:
- REJ511 part-number identification
- Legacy relay availability
- Existing-unit matching
- Single-piece and bulk quotations
- Export packing
- International shipment
Request a Quote for ABB REJ511
For ABB REJ511 price and availability, send:
- Complete REJ511 part/order number
- Clear nameplate photograph
- Quantity required
- Destination country
- Required delivery date
If the code is not readable, send clear photographs of the relay front and nameplate.
Send your ABB REJ511 part code, quantity and destination country to ARP IMPEX for availability, price and export quotation.
