Trip-Circuit Supervision; Self-Supervision; Fuse Failure Supervision; Current Circuit Supervision - ABB RELION 630 Series Product Manual

Generator Protection and Control
REG630
Product version: 1.3
The monitoring functions provide operational circuit breaker
history data, which can be used for scheduling preventive
circuit-breaker maintenance.

11. Trip-circuit supervision

The trip-circuit supervision continuously monitors the
availability and operability of the trip circuit. It provides open-
circuit monitoring both when the circuit breaker is in its closed
and in its open position. It also detects loss of circuit-breaker
control voltage.

12. 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.
Self-supervision events are saved into an internal event list
which can be accessed locally via the user interface on the
protection relay's front panel. The event list can also be
accessed using the Web HMI or PCM600.

13. 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.

14. Current circuit supervision

Current circuit supervision is used for detecting faults in the
current transformer secondary circuits. On detecting of a fault
the current circuit supervision function can also activate an
alarm LED and block certain protection functions to avoid
unintended operation. The current circuit supervision function
calculates the sum of the phase currents and compares the
sum with the measured single reference current from a core
balance current transformer or from another set of phase
current transformers.

15. Access control

To protect the protection relay from unauthorized access and to
maintain information integrity, the protection relay is provided
with an authentication system including user management.
Using the IED User Management tool in the Protection and
Control IED Manager PCM600, an individual password is
assigned to each user by the administrator. Further, the user
name is associated to one or more of the four available user
groups: System Operator, Protection Engineer, Design
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Engineer and User Administrator. The user group association
for each individual user enables the use of theprotection relay
according to the profile of the user group.

16. Inputs and outputs

The protection relay can be equipped with three different
combinations of current and voltage inputs. The available
options are five current and four voltage inputs, seven current
and three voltage inputs, and eight current and two voltage
inputs.
The phase-current inputs are rated 1/5 A. The option with five
current and four voltage inputs has one input rated to 0.1/0.5 A.
The 0.1/0.5 A input can be used for example for stator earth-
fault protection.
The voltage inputs, for either phase-to-phase voltages or
phase-to-earth voltages, and the residual-voltage input cover
the rated voltages 100 V, 110 V, 115 V and 120 V. The rated
values of the current and voltage inputs are selected in the relay
software.
The optional RTD/mA module facilitates the measurement of up
to eight analog signals via the RTD/mA inputs and provides four
mA outputs. With RTD sensors the RTD/mA inputs can for
instance be used for temperature measurement stator
windings, thus extending the functionality of the thermal
overload protection and preventing premature aging of the
windings. Furthermore, the RTD/mA inputs can be used for
measuring the ambient air or cooling media temperature, or
bearing temperatures. The RTD/mA inputs can be used for
supervision of analog mA signals provided by external
transducers. The RTD/mA inputs can be alternatively used also
as resistance input or as an input for voltage transducer. The
RTD/mA module enables the use of the multipurpose analog
protection functions. These protection functions can be used
for tripping and alarm purposes based on RTD/mA measuring
data, or analog values communicated via GOOSE messaging.
The mA outputs can be used for transferring freely selectable
measured or calculated analog values to devices provided with
mA input capabilities.
The enhanced scalability of the 6U variant protection relays are
intended for optimized medium voltage metal-clad switchgear
applications where additional binary inputs and outputs are
often required.
All binary input and output contacts are freely configurable
using the signal matrix of the application configuration function
in PCM600.
See the Input/output overview tables, the selection and
ordering data and the terminal diagrams for more information
about the inputs and outputs.
1MRS757583 C
ABB