ABB Compact Current Relay and Protection Assemblies RXHL 422, RAHL 422 Datasheet

Compact current relay and RXHL 422 and protection assemblies RAHL

1MRK 509 057-BEN

Issued: May 2000 Status: New

Data subject to change without notice

Features Two phase compact current relay for: Fundamental measuring of voltage and

Phase overcurrent protection, three current with low harmonic dependence stages

Logic for detection and clearance of

Thermal overload protection, one stage intermittent faults Directional earth-fault protection for sol- Breaker-failure protection idly or low impedance grounded net-

Start of the breaker failure protection

works

both from internal and external protec-

Breaker failure protection tion functions Automatic reclosing (option) Re-trip initiated from external start Phase overcurrent protection function with Back-up trip if settable current levels are

exceeded after a settable delay

Three stages, the first stage has select- able time delay; definite or inverse. The General characteristics for the relay second and the third stage have definite

There are two groups of parameters set-

time delay

table and readable through the HMI

Logic for detection and clearance of

The dialog with the relay can be made in

intermittent faults

English or Swedish

Thermal overload protection

There are two binary inputs for blocking

Stage with alarm and trip level or enabling of selected functions. The

binary inputs can also be used for

Thermal time constant settable within a

change of setting groups

wide range

There are five binary output relays,

Directional earth-fault protection function

which can be independently configured

for the different protection functions

Three directional or non-directional

Service values (primary/secondary) and

stages, the first stage has selectable

disturbance information can be pre-

time delay; definite or inverse. The sec-

sented through the HMI

ond and the third stage have definite time delay Start, trip can be presented through the

Polarising voltage down to 0.5%

The relay has self-supervision with out-

Settable characteristic angle from 0° to

put error signal