ABB Remote I/O RIO600 Installation And Commissioning Manual page 144

Section 6
Commissioning
136
Functionality
The voltage presence indication function PHSVPR supervises the voltage presence
status. The function is used for indicating the voltage presence status of a load break
switch or a circuit breaker.
Operation principle
The Operation setting is used to enable or disable the function. The corresponding
parameter values are "On" and "Off".
The operation of PHSVPR can be described by using a module diagram. All modules
in the diagram are explained in the next sections.
U_A
U_B
U_C
GUID-8CA753E3-27C3-4EE9-A84A-F5489C662DCB V1 EN
Figure 78: Functional module diagram
Voltage detector
This module supervises phase-to-earth voltage. The Alive Phase Supervision and
Dead Phase Supervision settings define which phase or phases are monitored for
voltage presence and voltage absence respectively. The measured phase-to-earth
voltages are compared with the threshold settings.
If the measured phase-to-earth voltage remains above the set Voltage Live Value for
1 second for the phases defined under Alive Phase Supervision, the PHSVPR_ULive
output activates indicating the voltage presence. Similarly, if the measured phase-to-
earth voltage remains below the set Voltage Dead Value for 1 second for the phases
defined under Dead Phase Supervision, the PHSVPR_UDead output activates
indicating voltage absence.
However, if the phase-to-earth voltage for the phase under supervision drops below
the set Voltage Live Value or rises above the Voltage Dead Value, outputs
PHSVPR_ULive and PHSVPR_UDead are deactivated.
The hysteresis is used for preventing unnecessary oscillations if the input signal varies
slightly above or below the threshold setting. After leaving the hysteresis area, the
start condition has to be fulfilled again and it is not sufficient for the signal to only
return back to the hysteresis area. The hysteresis setting is not freely configurable.
The activation of PHSVPR_ULive is indicated with LED 8 of the SIM8F module in
green color whereas the activation of PHSVPR_UDead is indicated with the same
LED 8 of the SIM8F module in red color.
ULive
Voltage
detection
UDead
1MRS757488 H
Installation and Commissioning Manual
RIO600