ABB DASD001/3ASC25H241 Digital Input Module

Protection functions

The IED offers directional and non-directional overcurrent and thermal overload protection as

well as directional and non-directional earth-fault protection. 

Some standard configurations allow as an option admittance-based, harmonics-based

or wattmetric-based earth-fault protection to be used in addition to directional earth-fault

protection. Further, the IED features sensitive earth-fault protection, phase discontinuity

protection, transient/intermittent earth-fault protection, overvoltage and undervoltage

protection, residual overvoltage protection, positive-sequence undervoltage and negativesequence overvoltage protection.

Frequency protection, including overfrequency,underfrequency and frequency rate-of-change

protection, is offered in IEDs with standard configurations H and J. 

The IED also incorporates optional three-pole multi-shot auto-reclose

functions for overhead line feeders.

Enhanced with optional hardware and software, the IED also features three light detection

channels for arc fault protection of the circuitbreaker, busbar and cable compartment of metalenclosed indoor switchgear.

The arc-fault protection sensor interface is available on the optional communication module.

Fast tripping increases staff safety and security and limits material damage in an arc fault situation

The 610 series protection relays are suitable for employment in marine and offshore environments.

The numerical voltage protection relays of the 610 series support a wide range of standard communication protocols,

among them the IEC 61850, IEC 60870-5-103, DNP3, Modbus,Profibus, LON and SPA communication protocols.

The REM 545 machine terminals are used as the main protection system of generator and generator-transformer 

units in small and medium-power diesel, hydroelectric and steam power plants. 

The protection for large and/or important MV synchronous and asynchronous motors used, 

for example, in pumps, mills and crushers during start-up and normal run forms another application area.