Event Log - ABB RET615 Product Manual

ABB
Transformer Protection and Control
RET615
Product version: 4.0

9. Event log

To collect sequence-of-events (SoE) information,
the IED incorporates a non-volatile memory with a
capacity of storing 1024 events with associated
time stamps. The non-volatile memory retains its
data also in case the IED temporarily loses its
auxiliary supply. The event log facilitates detailed
pre- and post-fault analyses of feeder faults and
disturbances. The increased capacity to process
and store data and events in the IED offers
prerequisites to support the growing information
demand of future network configurations.
The SoE information can be accessed locally via
the user interface on the IED front panel or
remotely via the communication interface of the
IED. The information can further be accessed,
either locally or remotely, using the web-browser
based user interface.
10. Recorded data
The IED has the capacity to store the records of
128 latest fault events. The records enable the
user to analyze the power system events. Each
record includes current, voltage and angle values,
time stamp, etc. The fault recording can be
triggered by the start signal or the trip signal of a
protection block, or by both. The available
measurement modes include DFT, RMS and peak-
to-peak. In addition, the maximum demand
current with time stamp is separately recorded.
By default, the records are stored in a non-volatile
memory.
11. Condition monitoring
The condition monitoring functions of the IED
constantly monitors the performance and the
condition of the circuit breaker. The monitoring
comprises the spring charging time, SF6 gas
pressure, the travel-time and the inactivity time of
the circuit breaker.
The monitoring functions provide operational
circuit breaker history data, which can be used for
scheduling preventive circuit breaker maintenance.
12. 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.
13. Self-supervision
The IED's built-in self-supervision system
continuously monitors the state of the IED
hardware and the operation of the IED software.
Any fault or malfunction detected is used for
alerting the operator.
A permanent IED fault will block the protection
functions to prevent incorrect operation.
14. Access control
To protect the IED from unauthorized access and
to maintain information integrity, the IED is
provided with a four-level, role-based
authentication system with administrator-
programmable individual passwords for the
viewer, operator, engineer and administrator level.
The access control applies to the front-panel user
interface, the web-browser based user interface
and the PCM600 tool.
15. Inputs and outputs
The IED is equipped with six phase-current inputs
and one neutral-current input or six phase-current
inputs, one neutral-current input, three phase-
voltage inputs and one residual voltage input. The
rated level of the current inputs is 1/5 A and
selectable in the IED software. 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. In addition, the binary input
thresholds 18...176 V DC are selected by
adjusting the IED's parameter settings.
All binary inputs and outputs contacts are freely
configurable with the signal matrix or application
configuration functionality of PCM600.
As an option for standard configurations A, B, C
and D, the IED offers six RTD inputs and two mA
inputs. By means of the optional RTD/mA module
the IED can measure up to eight analog signals
such as temperature, pressure and tap changer
position values via the six RTD inputs or the two
mA inputs using transducers. The values can,
apart from measuring and monitoring purposes,
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