Control; Measurement - ABB REU615 Product Manual

Voltage Protection and Control
REU615
Product version: 4.0
GUID-6984D893-45D5-427A-BABF-F1E1015C18E2 V3 EN
Figure 6. Industrial power system example using 615 series IEDs, Grid Automation controller COM600 and
System 800xA

6. Control

The IED offers control of one circuit breaker with
dedicated push-buttons for circuit breaker
opening and closing. Further, the optional large
graphical LCD of the IED's HMI includes a single-
line diagram (SLD) with position indication for the
relevant circuit breaker. Interlocking schemes
required by the application are configured using
the signal matrix or the application configuration
feature of PCM600.
Standard configuration A incorporates a synchro-
check 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 IED sends control commands to the
tap changer thus enabling automatic voltage
regulation.

7. Measurement

The offered measurement functions depend on
the chosen standard configuration. Standard
configuration A offers phase voltage, residual
12
voltage and voltage phase sequence component
measurement. In addition, the standard
configuration includes frequency measurement.
IEDs 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 IED
offers three-phase power and energy
measurement including power factor. In addition,
the IED calculates the demand value of current
over a userselectable 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 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 measured can be accessed locally via
the user interface on the IED front panel or
remotely via the communication interface of the
IED. The values can also be accessed locally or
1MRS757058 D
ABB