The numerical relay for distribution networks at the entry-level REJ601 by ABB is a reliable feeder protection relay. They are operatable in primary and secondary distribution networks to protect the utility and industrial power systems. The relay combines the finest performance and usability in its class with an optimum composition of protection and monitoring functionality in one device.
Aside from the traditional current transformer interface, the relay also offers an analogue interface according to Rogowski current sensors. This contributes to the decrease in the size of medium voltage switchgear equipment while improving performance and standardisation.
Scope of Abb Feeder Protection REJ601 Numerical Relay
- In securely earth, resistance-earth, or isolate networks, the main protection for overhead lines and cable feeds
- Distribution transformers have an inrush current stabilising function
Key Benefits of ABB REJ601 Relay Product
- Fast commissioning thanks to a selectable test function for protective functions, binary signals, and communication features.
- Binary inputs and outputs that are easily programmable
- Relay hardware and software for extensive self-monitoring.
- Better safety with the use of sensor variants and detachable terminals with CT shorting capability.
- Compact, adaptable, and simple to use
- Installation is simple and quick thanks to the press-fit mounting system.
Product Features of Feeder Protection Numerical Relay
- These devices have Inrush current detection, reclosing, and measurement
- Overcurrent, earth-fault, phase-discontinuity, negative-phase sequence, and thermal-overload safeguards.
- Binary inputs/outputs are configurable via a local HMI or a communication interface
- CT selection (1 or 5A) is site selectable with Boolean logic and timers.
- A power supply that is universal AC/DC Voltage: 24-265 Volts
- Commissioning is simple and quick thanks to pre-configuration capabilities.
- Modbus and IEC 60870-5-103 protocols.
Here Are The Protection functions REJ601 Numerical Relay
REF601/REJ601 has three stages of overcurrent protection and also two stages of earth-fault protection. The transformer inrush detection function is available to prevent any unintentional tripping by transformer energization.
The low-set stages for overcurrent protection and also for earth-fault protection have selectable properties. In fact, it includes Definite time (DT) and Inverse definite minimum time (IDMT) (IDMT). The device has conventional IDMT characteristics according to ANSI C37.112 and IEC 61 255-3. This includes Normal Inverse (NI), Very Inverse (VI), Extremely Inverse (EI), Long-time Inverse (LI), and a special characteristic RI inverse (RI). This function helps in improving network coordination in the power system. Thermal overload protection for feeders, cables, and transformers, as well as negative phase sequence protection. Phase discontinuity protection, and circuit breaker failure protection, are all available from the relay. For overhead line feeders, Recently Relays also includes an auto-reclose functionality.
Application Of ABB REJ601 Relays
The REF601/REJ601 is a protection relay operatable in MV distribution substations. They are built to protect and control incoming and outgoing feeders. The relay is to safeguard overhead lines and cable feeders. Especially in distribution and sub-distribution networks from short-circuits, overcurrents, and earth faults. The relay’s inrush current stabilising feature enables it to be the primary safeguard for distribution transformers.
Non-directional over current and earth-fault protection are available by the relay. With application configuration B you can use phase currents to calculate the residual current for earth-fault protection. Core-balance current transformers to measure residual current when necessary, particularly where sensitive earth-fault protection is essential.
Thermal overload protection for feeders, cables, and transformers, phase discontinuity prevention. They also provide circuit breaker failure protection in application configuration C. They have negative phase sequence protection and also multi-shot auto-reclose functionality. This application configuration D provides the most functionality, making the relay fit for overhead line feeders. Moreover, its memory has a capacity of 100 events and also time stamps with a resolution of 1 millisecond.
The event log records the status of the trip circuit supervision, protection operation, binary I/O status, and relay fault code. The most recent event log is saved first, followed by the next most recent event log, and so on. Non-volatile memory saves data even if the relay’s auxiliary power is suddenly cut off.
Details About ABB Numerical relays
ABB Microprocessors are for enhancing the power numerical relays. Between electromechanical and static relays, the manner they are wired is a key distinction. The configuration of electromechanical and static relays is done manually, and the wiring is fixed. Numeric relays, on the other hand, are programmable relays with the ability to programme their properties and behaviour. But recently the majority of numerical relays are multipurpose as well.
Now you can also get Electrical Field Services.
We Digital & Smart Grid Enterprises are the leading ABB Relay Suppliers protection relay supplier, and exporters in Maharashtra. We also provide a wide range of services and also customized solutions for Industries & Panel Builders. Contact us at +91 7021624024 or mail us your requirements at info@dsgenterprises.in. We also deal in a wide range of products in ABB, to view more of our ABB Numerical relay collection click here.
