ABB RED615 HCDCACADNKC2DAE11E Line Differential Protection and Control

Overcurrent-time protection

This is a back-up protection function which is calculated locally in the BU and used to provide simple,

autonomous feeder protection in each BU.

Event recording

All events are stored with a resolution of 1 ms in the central unit and in the BUs.

System, protection and test events can be generated.

Protection events refer to the protected busbar and include the changes in the disconnector and breaker positions,

trips, etc. Test events are recorded during testing with the test signal generator.

System events describe the diagnostic and fault messages of the NBP system as a whole.

Disturbance recorder function

The three conductor currents, the current in the directly earthed conductor,

binary signals, and the voltages, can be recorded in each BU. 

Recording can be started, for example, by a protection function or an input signal. 

The disturbance recorder data are stored in the REB 500. 

They can be read out directly on the BU or at the central unit in COMTRADE format and stored on the PC. 

An evaluation program (eg, WINEVE) is used for further processing.

Application

REF610 is a versatile multifunction protection relay mainly designed for protection

of incoming and outgoing feeders in MV distribution substations. 

The relay can also be used as back-up protection for motors, transformers and generators,

in industrial as well as in utility applications.

The large number of integrated protection functions, including three-stage

overcurrent protection, two-stage, non-directional earth-fault protection as well as

thermal protection, makes the relay a complete protection against overcurrent and earth faults.

The optional arc protection for detection of arc situations in air insulated metal-clad

switchgears and the auto-reclose function for automatic clearing of overhead line

faults increase the range of applications further.

The large number of digital inputs and output contacts allows a wide range of applications.

REF610 is a member of ABB’s Relion® product family and part of its 610 product series. 

The series includes protection relays for feeder protection, motor protection and general system voltage supervision. 

The plug-in design facilitates the commissioning of the switchgear and enables fast and safe insertion and withdrawal of protection relay plug-in units.

REF610 is primarily intended for the protection of incoming and outgoing feeders in distribution substations of 

resistance earthed and solidly earthed power systems. 

REF610 is suitable for employment in marine and off-shore environments. 

Supplied with an optional arc protection function REF610 also provides fast substation busbar arc-fault protection.

New features and benefits

The following new features and their benefits are introduced in this update:

Line distance protection for series compensated lines is now improved by an extremely fast transient direction detection 

based on the well proven RALDA principles. 

The high speed fault detection from both line ends together with scheme communication enables fast fault clearance.

REL670 now includes increased number of functional instances whereby protection of two 

overhead lines (one as main and another as backup) can be achieved using a single IED.