Parameters; Three-Phase Voltage Plausibility 47 (U3Ph); Mode Of Operation; Features - ABB RELION REB500 Technical Manual

Section 5
Bay protection functions
5.13.5

Parameters

Table 98: Three-phase current plausibility function - parameters
Signal
ParSet4..1
I-Setting
Delay
CT-Compens
CurrentInp
BlockInp
Trip
5.14

Three-phase voltage plausibility 47 (U3PH)

5.14.1

Mode of operation

Checking the plausibility of the three-phase voltage inputs for
• detection of residual voltage
• monitoring the asymmetry of the three-phase voltage system due to the zero-sequence
component
• supervision of the VT input channels
5.14.2

Features

Evaluation of:
• the sum of the three phase voltages
• the sequence of the three phase voltages
• Provision for comparing the sum of the three phase voltages with a residual voltage input
• Adjustment of residual voltage amplitude
• Blocking at high voltages (higher than 1.2 × UN)
• Blocking of phase-sequence monitoring at low voltages (below 0.4 × UN phase-to-phase)
• Insensitive to DC components
• Insensitive to harmonics
180
Description
Parameter for determining in which set of parameters a particular function is active.
Current setting for tripping
Time between start signal at the I/P and the tripping signal at the output.
Forbidden settings:= 1 s for current settings = 0.2 I
Amplitude compensation factor for the residual current input, enabling different
transformation ratios of the main CTs for phase and residual currents to be
equalized.The polarity of the residual current can be reversed by entering negative
values.
Defines the current input channel.
Any of the three-phase current inputs may be selected.
Input for blocking the function.
• F: enabled
• T: disabled
• xx: all binary inputs (or outputs of protection functions)
Tripping signal
If the phase sequence is incorrect, tripping takes place regardless of setting (
Setting ).
© Copyright 2019 ABB. All rights reserved
1MRK 505 406-UEN B
GUID-501DB0C4-931D-457E-9D87-8412CAD11296 v1
N
GUID-DFFD6CC5-9BC6-492C-9A4B-2A5DB48A79A9 v1
GUID-5AC61C76-D785-48F2-81F7-D87528474E04 v1
Bay protection functions REB500
Technical manual
I-