ABB REC 670 Bay control IED Application

Application

The REC 670 IED is used for the control, protection and monitoring of different types of bays in

power networks. The IED is especially suitable for applications in distributed control systems with

high demands on reliability. The IED can be used up to the highest voltage levels. It is suitable for

the control of all apparatuses in any type of switchgear arrangements.

The control is performed from remote(SCADA/Station) through the communication bus

or locally from a graphical HMI on the front of the IED showing the single line diagram.

Different control configurations can be used, e.g. one control IED can be used per bay or one IED can be com

mon for several bays. Interlocking modules are available for all common types of switchgear

arrangements. The control is based on the select-execute principle to give highest possible

reliability. A synchrocheck function is available to interlock breaker closing.

A number of protection functions are available for flexibility in use for different station types and

busbar arrangements. The auto-reclose for single-, two-, and/or three-phase reclose includes priority

circuits for multi-breaker arrangements. It co-oper ates with the synchrocheck function with quick or

delayed reclosing. Several breaker failure functions are included to provide a breaker failure

function independent from the protection IEDs,also for a complete one- and a half breaker diameter.

High set instantaneous phase and earth overcur rent, 4 step directional or un-directional delayed

phase and earth overcurrent, thermal overload and two step under and overvoltage functions are

examples of the available functions allowing user to fulfill any application requirement.

Disturbance recording and fault locator are avail able to allow independent post-fault analysis after

primary disturbances with a single failure in the protection system.

6 x 32 dual directional channels for intertrip and binary signals transfer is available in the commu

nication between selected IEDs inside the station or in a near-by station.

The advanced logic capability, where the user logic is prepared with a graphical tool, allows spe

cial applications such as automatic opening of disconnectors in multi-breaker arrangements, closing

of breaker rings, load transfer logics etc. The graphical configuration tool ensures simple and

fast testing and commissioning.

Serial data communication is via optical connections to ensure immunity against disturbances.

The wide application flexibility makes this product an excellent choice for both new installations and

the refurbishment of existing installations.