14. Self-supervision
The relay’s built-in self-supervision system continuously
monitors the state of the relay hardware and the operation of
the relay software. Any fault or malfunction detected is used for
alerting the operator.
A permanent relay fault blocks the protection functions to
prevent incorrect operation.
15. Fuse failure supervision
The fuse failure supervision detects failures between the
voltage measurement circuit and the relay. The failures are
detected either by the negative sequence-based algorithm or
by the delta voltage and delta current algorithm. Upon the
detection of a failure, the fuse failure supervision function
activates an alarm and blocks voltage-dependent protection
functions from unintended operation.
16. Access control
To protect the relay from unauthorized access and to maintain
information integrity, the relay is provided with a four-level, role-
based authentication system with administrator-programmable
individual passwords for the viewer, operator, engineer and
administrator levels. The access control applies to the local
HMI, the Web HMI and PCM600.
17. Inputs and outputs
Depending on the standard configuration selected, the relay is
equipped either with three or six phase-current inputs and one
residual current input, three phase-voltage inputs and one
residual voltage input, and one voltage input that is used either
for synchro-check or for the 3rd harmonic-based stator earth-
fault protection depending on the standard configuration.
The phase-current inputs are rated 1/5 A. Two optional
residual-current inputs are available, that is, 1/5 A or 0.2/1 A.
The 0.2/1 A input is normally used in applications requiring
sensitive earth-fault protection and featuring core-balance
current transformers. The three phase-voltage inputs and the
residual-voltage input covers the rated voltages 60...210 V.
Both phase-to-phase voltages and phase-to-earth voltages
can be connected.
The phase-current input 1 A or 5 A, the residual-current input 1
A or 5 A, alternatively 0.2 A or 1 A, and the rated voltage of the
residual voltage input are selected in the relay software. In
addition, the binary input thresholds 16…176 V DC are selected
by adjusting the relay’s parameter settings.
All binary inputs and outputs contacts are freely configurable
with the signal matrix or application configuration functionality
of PCM600.
See the Input/output overview table and the terminal diagrams
for more information about the inputs and outputs.
Optionally, a binary input and output module can be selected. It
has three high speed binary outputs (HSO) and it decreases the
total operate time with typically 4...6 ms compared to the
normal power outputs.
Generator and Interconnection Protection
1MRS758279 B
REG615
Product version: 5.0 FP1
ABB
19
