DILO SF6 GAS Handling Products

Feeder protection relay REF615 ANSI
Reliability, security, and dependability with Relion®
The REF615 is a dedicated feeder relay perfectly aligned for the protection, control, measurement, and supervision of utility substations and industrial power systems.

REF615 is a member of ABB’s Relion® family and a part of its 615 protection and control product series. The 615 series ANSI are characterized by their compactness and withdrawable design. Engineered from the ground up, the 615 series has been designed to unleash the full potential of the IEC 61850 standard for communication and interoperability of substation automation devices.

Scope
Feeder protection for overhead lines, cable feeders, and busbar systems of distribution substations
Key benefits

Maximized capital by keeping assets working longer with designs that require less equipment and space
Enhanced safety by reducing hazards with safety-conscious designs
Increased reliability by maintaining vital operations with steady, high-quality power every minute of every day
Reduced operating costs with effective energy management and maintenance strategies
More flexible system upgrades without rewiring or changing components
Ease of integration with non-proprietary IEC 61850 communications
Key features

Drawout design
Underground, overhead cable fault detection (CFD)
High-impedance (HIZ) fault detection
Arc flash detection (AFD)
Ring-lug terminals for all inputs and outputs
Large, easy-to-read LCD

Characteristics:

• 3 types of User-Machine Interface
• 4 current inputs 
• 3 voltage inputs 
• 28 binary inputs
• 16 binary outputs
• logic equation editor 
• IEC 61850 w/ GOOSE 
• 1 Modbus communication port
• 16 RTD inputs
• removable memory cartridge with parameters and settings for quick commissioning after replacement

• Remote and Advanced displays available
• Digital I/O: 0-10 Inputs/4-8 Outputs
• Analog Outputs: 1 Output 
• Two Modbus communication ports
• 0-8 temperature sensor inputs
• LPCT: low-power current transducer complying with standard IEC 60044-8
• Removable memory cartridge with parameters and settings for quick commissioning after replacement
• Built-in logic matrix and equation editor

MiCOM P72x high impedance differential protection series provides high impedance differential protection for generators, reactors, motor and busbar applications. Models available: MiCOM P721, MiCOM P723.

Applications

P721 offers reliable protection for busbars, transformers windings, generators, reactors and motors. P721 is suitable for restricted earth fault (REF) or balanced earth fault (BER) applications. P723 is suitable for busbar and machine phase differential protection.

MiCOM P721 also offers the same application benefits as traditional high impedance electromechanical protection schemes, it combines the added benefits of numerical technology to provide advanced communications, event records, fault records, disturbance records and ancillary protection features.

Combined with the MiCOM P79x, a standalone metrosil and resistor unit, it provides simplified scheme engineering for single or three-phase differential applications.

Standard Manufacturers Warranty: 2 years

Benefits

Numerical High Impedance Relay

• Simple scheme engineering
• Reliable algorithm - stable for through fault and fast trip for internal fault
• Supervision functions included in the same protection box
• Set by current or voltage
• Numerical relay features

Easergy MiCOM P541-P546 series provides high-speed current differential unit protection. The P54x is designed for all overhead line and cable applications, as it interfaces readily with the longitudinal (end to end) communications channel between line terminals. The interface options support direct fibre optic, or multiplexed digital links.

Optimum selectivity is assured, as the scheme measures the currents entering and leaving the protected plant item. Instantaneous tripping results for an internal fault, with stability for any out-of-zone fault. Tripping uses a proven characteristic comparing differential current with through current, for ease of testing. Phase differential elements of this type offer consistent detection of solid and resistive faults, with optimum faulted phase selection, tripping, and indication.

A full range of back-up protection is integrated. This enhances the dependability of the protection, as hot-standby elements (such as distance zones and overcurrent) can be brought into service whenever a signalling channel outage may occur.