Description

ABB REJ601 BD446NN1XG is a digital feed protection relay designed specifically for medium voltage distribution networks,integrating protection,monitoring,and control functions.It is suitable for public substations,industrial power systems,and complex distribution scenarios.The following are its core functions and technical features:

1.Core functions

Multi functional protection

Overcurrent protection:three-level overcurrent protection(including timed DT and inverse time IDMT characteristics),supporting IEC and ANSI standards.

Ground fault protection:Two level ground fault protection,compatible with internal calculations or external zero sequence current transformer(CBCT)measurements.

Thermal overload protection:Real time monitoring of equipment load status to prevent overheating damage.

Phase discontinuity protection:detects phase failure,single-phase or reverse phase faults to ensure power supply continuity.

Circuit breaker fault protection:prevents circuit breakers from refusing or misoperation,and improves system reliability.

Special Features

Surge detection:Suppress the surge current during transformer charging that may cause false tripping.

Automatic recloser function:suitable for multiple fault recovery of overhead line feeders.

Control and Monitoring

Supports local human-machine interface(HMI)and remote communication(Modbus/IEC 60870-5-103).

Provide 100 event records with timestamps,five simulated fault records,and non resettable trip counters.

2.Technical parameters

hardware design

Installation method:Press in design,small depth,suitable for compact switchgear.

Sensor input:Supports 1A/5A standard CT input and Rogowski coil interface.

Power supply:Universal 24-265V AC/DC power supply.

communication protocol

Optional Modbus RTU or IEC 60870-5-103 protocol,supporting fiber optic communication.

Environmental adaptability

Rated frequency:50/60Hz optional.

Self checking function:Dual self checking of hardware and software to ensure stable operation.

3.Application scenarios

Distribution network protection

Suitable for cables,overhead lines,and transformer feeders in grounded,resistance grounded,or isolated networks.

As the main protection device of distribution transformers,it provides surge current stabilization function.

Industrial system integration

Integrated into medium voltage switchgear,supporting quick installation and debugging,compatible with traditional measurement sensors.

Suitable for power system protection and monitoring in industries such as power plants,chemicals,and metallurgy.

4.Advantages and Characteristics

high reliability

Adopting press fit installation to reduce the risk of looseness;Built in trip circuit monitoring and circuit breaker control functions.

flexible configuration

Support application configuration B/C/D,corresponding to different protection levels(such as adding negative sequence protection and automatic recloser function to configuration D).

user friendliness

Dual setting group switching,multilingual interface,and pre configuration function simplify the parameter setting process.

Choose Shenzhen Changxin for worry-free after-sales service and high-quality products. We only cooperate with first-tier brand manufacturers in the industry. Our products are imported and comprehensive. We provide thoughtful pre-sales service, communicating multiple times with customers about product models, quality, prices, and delivery schedules to jointly confirm the solutions and address users’ concerns in advance. Business execution is in place, ensuring on-time delivery of ordered products and formulating a comprehensive delivery plan to guarantee the project schedule. We also assist users in handling acceptance procedures.

Our after-sales service is impeccable. For any problems during the warranty period, we only replace, not repair. We never shirk responsibilities or pass the buck when encountering problems. Our service hotline is available 24/7: 18150087953

SOLEMN COMMITMENT

For all items, modules, and cards sold by our company, if any quality problems occur during normal use within the warranty period, we will provide free replacements without any excuse or delay.
For non-discontinued materials and equipment that are out of the warranty period, we only charge the cost of relevant accessories for quality problems.
For discontinued materials and equipment, we provide alternative models and equipment replacement process services.
For the materials and equipment purchased by customers, we offer lifetime free system software upgrades and provide relevant technical documents for free.
We regularly follow up on the usage of the materials purchased by customers and promptly solve any problems.
Our company’s hotline provides 24-hour service, and we will respond to customers’ questions within 1 hour.
For any other matters not covered, our company adheres to the attitude of “thoughtful service and full responsibility” and solves problems from the customer’s perspective in a practical way. With a serious and rigorous corporate style, we wholeheartedly serve every customer.

The company mainly imports PLC modules, programmable controllers, servo control systems and DCS spare parts, such as: ABB, AB (Rockwell), GE (General Electric), Bentley, Honeywell, Emerson, Motorola, Invensys, Westinghouse, etc. The company has established close cooperative relations with many world-renowned PLC and DCS product maintenance service providers, and can directly purchase from abroad, providing equipment and spare parts from different countries and manufacturers.

We supply directly from abroad, without middlemen, reducing the cost of use.

There is really no middleman who can make a price difference! !

If you have any defects or need to import PLC, DCS spare parts, please contact our team, we will help you find reliable and high-quality products super quickly, while shortening the delivery time to ensure that your equipment can operate normally in the right environment. On time.

Professionally provide: PLC programmable control system, distributed control system (DCS), safety instrument system (SIS), ESD system, vibration monitoring system, turbine compressor control system (CCS) and other PLC modules, various industrial control systems, system modules, CPU, IO module, DO module, AI module, DI module, network communication module, Ethernet module, motion controller, analog input module, analog output module, switch input module, switch output module, module redundancy, power supply module, relay output unit, relay input unit, processing unit.

Products are widely used in: electricity, petroleum, mine hoisting, ports, heating, gas, water supply, sewage treatment, metallurgy, papermaking, textile, chemical industry, water conservancy and other modern industrial fields!

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