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Phone: +86 16626708626Description
Real-World Use & Application Scenarios
The ABB REJ601 BD446NN1XG is a dedicated feeder protection relay widely used in utility substations and industrial power systems for primary and secondary distribution network protection. This relay excels in applications where reliable overcurrent and earth-fault protection are crucial to safeguard cables, overhead lines, transformers, and feeders in electrical distribution. It helps address issues related to electrical faults, system imbalances, and unwanted interruptions, which are common challenges in power networks. The ABB REJ601 BD446NN1XG is ideal for power utilities and industrial facilities aiming to enhance protection while simplifying network management, reducing downtime, and ensuring system availability in complex distribution environments.
Product Introduction & Positioning
The ABB REJ601 BD446NN1XG is a numerical feeder protection relay from ABB’s Relion® 600 series, designed specifically to provide optimized overcurrent and ground fault protection without breaker control functions. It fits as an efficient and compact solution for distribution network feeders, combining protective functions with fault detection and monitoring capabilities. The relay supports flexible configuration through a local human-machine interface (LHMI) and communication via modular protocol support such as Modbus and IEC 60870-5-103, facilitating easy integration into SCADA and substation automation systems. This model is positioned as an entry-level yet capable protection device for feeders, delivering a compact, user-friendly design that supports quick commissioning and reliable protection functions.
Key Technical Features & Functional Benefits
The ABB REJ601 BD446NN1XG features three-stage overcurrent and two-stage ground-fault protections with selectable definite time and inverse definite minimum time characteristics, enhancing coordination in complex electrical networks. It includes a transformer inrush stabilizer to avoid false trips during transformer energization. The relay’s ability to detect phase discontinuity, thermal overload, negative sequence overcurrent, and earth faults enhances overall feeder protection coverage. Its built-in self-supervision, binary input/output configurability, and alarm outputs aid in efficient fault management and preventive maintenance.
Communication capabilities support remote monitoring and control through widely used industrial standards, and the device’s press-fit mounting arrangement enables swift installation or replacement in existing panels. The relay incorporates extensive diagnostics, enabling reliable fault analysis and system health monitoring, crucial for minimizing outage durations and optimizing network stability.
REJ601 BD446NN1XG
REJ601 BD446NN1XG
REJ601 BD446NN1XG
Detailed Technical Specifications
| Parameter | Value |
|---|---|
| Model | REJ601 BD446NN1XG |
| Brand | ABB |
| Type | Feeder Protection Relay (Numerical) |
| Protection Functions | Overcurrent (3-stage), Ground Fault (2-stage), Transformer inrush stabilization, Phase discontinuity, Thermal Overload, Negative Sequence Overcurrent |
| Current Inputs | 3 analog current inputs (1A/5A), 1 earth current input |
| Binary Inputs | 4 configurable |
| Relay Outputs | 6 (2 power, 4 signaling) |
| Communication Protocols | Modbus RTU, IEC 60870-5-103 |
| Power Supply Range | 24 V to 265 V AC/DC |
| Operating Frequency | 50/60 Hz ± 5% |
| Dimensions (HxWxD) | 160 mm x 130 mm x 151.5 mm |
| Weight | 1.43 kg |
Related Modules or Compatible Units
REF601 – Feeder protection and breaker control relay complementing REJ601 for advanced network operations.
REJ602 – Advanced version with breaker control and more extended communication features.
RET543 – Transformer protection terminal used alongside feeder relays in substations.
REB670 – Breaker failure protection relay compatible with REJ601 in system protection schemes.
PM866 – High-performance processor module used with protection relays in automation.
TP830 Baseplate – Mounting accessory for secure installation of REJ601 and similar modules.
Installation Notes & Maintenance Best Practices
Install the ABB REJ601 BD446NN1XG in control panels ensuring stable mechanical mounting using the press-fit configuration that simplifies module replacement and minimizes downtime. Maintain clear access to connection terminals for easy wiring and routine inspection. Implement proper grounding and electromagnetic compatibility measures to ensure accurate relay performance and prevent interference.
Regular maintenance should focus on verifying wiring integrity, cleaning dust from the relay and surrounding cabinet, and testing relay functions via LHMI or remote interfaces. Firmware and configuration updates are recommended to maintain system security and adapt to evolving network requirements. Fault log analysis should be periodic to optimize protection settings and prevent nuisance tripping.
