ABB REF630 Feeder protection and control

ABB REF630 Feeder protection and control

DESCRIPTION

REF630 has been designed to be the main  protection for overhead lines and cable feeders,  in either isolated neutral, resistance-earthed,  compensated or effectively earthed distribution  networks. The comprehensive feeder  management relay offers four predefined  configurations, intended for open/closed ring  feeder applications, radial overhead/mixed line  feeder applications, ring/meshed feeder  applications and bus sectionalizers.The earth-fault protection has been significantly  extended, now including not only directional  and non-directional, transient/intermittent,  wattmetric and admittance-based, but also both  harmonics and multifrequency admittance-based  earth-fault protection. The new additions take  the earth-fault protection to new heights,  creating an extensive earth-fault protection  portfolio. In addition, the sensitivity of the  intermittent earth-fault protection has been  significantly improved and reactive power  undervoltage protection added.

FUNCTIONALITY

Control 

Overcurrent protection 

Earth-fault protection 

Thermal overload protection 

Multipurpose protection with RTD/mA Voltage protection 

Frequency protection 

Differential protection for two-winding transformers 

Low-impedance restricted earth-fault protection 

High-impedance restricted earth-fault protection 

Automatic voltage regulation 

Synchro-check

Application Areas

Electric power plants: monitoring and controlling generators, steam turbines, governors and other equipment to ensure the stable operation of the power generation system.

Power transformer and distribution: used in substations and distribution stations to monitor and control transformers, circuit breakers, voltage regulators and other equipment.

Grid control: applied in monitoring, scheduling and control of power systems to ensure the stability and reliability of power networks.

Industrial process control: in manufacturing and chemical plants for automating and monitoring production processes.

Energy Management System: supports the monitoring, analysis and optimisation of energy systems to improve energy efficiency.

Power Generation Scheduling: Coordinates and optimises the operation of power generation plants to meet electricity demand.

Smart Grid: in smart grids to support the digitisation and intelligence of the grid.

Product Parameters and Specifications

Processor: 32-bit RISC processor

Clock frequency: 100 MHz

Memory: 128MB

Flash memory: 256MB

Communication interface: RS-232/485, Ethernet, etc.

Input/output interface: analogue input/output, digital input/output

Operating temperature: -25°C to +60°C

Storage temperature: -40°C to +85°C

Relative humidity: 5% to 95% (non-condensing)

Protection rating: IP65

Product specification: 300mm x 200mm x 100mm

Installation and Maintenance

Environmental conditions:

Ensure that the module is installed within the recommended temperature and humidity ranges and avoid direct exposure to water, oil, dust or electromagnetic interference.

Power Requirements:

Use a stable power supply to avoid damage to the module from voltage fluctuations.

Signal Cable Connection:

Connect the signal lines correctly to ensure the accuracy and stability of signal transmission.

Software Configuration:

Correctly configure the software parameters of the module according to the system requirements to ensure compatibility with other parts of the control system.

Maintenance and Inspection:

Perform regular maintenance and inspection of the module, including cleaning and checking the contact status of the connectors.

Precautions

Operator Training:

Operators should receive proper operation and maintenance training to avoid malfunctions or safety accidents caused by incorrect operation.

Technical Documentation and Safety Guidelines:

The technical documentation and safety guidelines provided by the manufacturer should be read and understood in detail before installation and use.

Compliance with safety procedures:

Observe all relevant safety procedures to ensure personal safety, especially when handling high-pressure or high-speed rotating equipment.