Measurements; Disturbance Recorder; Event Log; Recorded Data - ABB RELION 615 SERIES Product Manual

Voltage Protection and Control
REU615
Product version: 5.0 FP1
application are configured using the signal matrix or the
application configuration functionality of PCM600.
Standard configuration A incorporates a synchrocheck function
to ensure that the voltage, phase angle and frequency on either
side of an open circuit breaker satisfy the conditions for safe
interconnection of two networks. Standard configuration B
includes functionality for controlling the voltage on the load side
of the power transformer. Based on the measured values the
relay sends control commands to the tap changer thus enabling
automatic voltage regulation.

7. Measurements

The offered measurement functions depend on the chosen
standard configuration. Standard configuration A offers phase
voltage, residual voltage and voltage phase sequence
component measurement. In addition, the standard
configuration includes frequency measurement.
Relays with standard configuration B measure the three phase
currents and the symmetrical components of the currents, the
phase voltages, the symmetrical components of the voltage
and the phase unbalance value based on the ratio between the
negative phase-sequence and positive phase-sequence
current. Furher, the relay offers three-phase power and energy
measurement including power factor. In addition, the relay
calculates the demand value of current over a user-selectable
pre-set time frame and the thermal overload of the protected
object.
For standard configuration B, RTD/mA inputs are offered as an
option. By means of the optional RTD/mA module the relay 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 measured values can be accessed via the local HMI or
remotely via the communication interface of the relay. The
values can also be accessed locally or remotely using the Web
HMI.
The relay is provided with a load profile recorder. The load
profile feature stores the historical load data captured at a
periodical time interval (demand interval). The records are in
COMTRADE format.

8. Disturbance recorder

The relay is provided with a disturbance recorder featuring up to
12 analog and 64 binary signal channels.The analog channels
12
can be set to record either the waveform or the trend of the
currents and voltages measured.
The analog channels can be set to trigger the recording function
when the measured value falls below or exceeds the set values.
The binary signal channels can be set to start a recording either
on the rising or the falling edge of the binary signal or on both.
By default, the binary channels are set to record external or
internal relay signals, for example, the start or trip signals of the
relay stages, or external blocking or control signals. Binary relay
signals, such as protection start and trip signals, or an external
relay control signal via a binary input, can be set to trigger the
recording. Recorded information is stored in a nonvolatile
memory and can be uploaded for subsequent fault analysis.

9. Event log

To collect sequence-of-events information, the relay has a non-
volatile memory capable of storing 1024 events with the
associated time stamps. The non-volatile memory retains its
data even if the relay temporarily loses its auxiliary supply. The
event log facilitates detailed pre- and post-fault analyses of
feeder faults and disturbances. The considerable capacity to
process and store data and events in the relay facilitates
meeting the growing information demand of future network
configurations.
The sequence-of-events information can be accessed either via
local HMI or remotely via the communication interface of the
relay. The information can also be accessed locally or remotely
using the Web HMI.

10. Recorded data

The relay has the capacity to store the records of the 128 latest
fault events. The records can be used to analyze the power
system events. Each record includes, for example, current,
voltage and angle values and a time stamp. The fault recording
can be triggered by the start or the trip signal of a protection
block, or by both. The available measurement modes include
DFT, RMS and peak-to-peak. Fault records store relay
measurement values at the moment when any protection
function starts. In addition, the maximum demand current with
time stamp is separately recorded. The records are stored in
the non-volatile memory.
1MRS757058 K
ABB