ABB RELION REB500 Operation Manual page 45

1MRK 500 132-UUS Rev. B
The abbreviations C.x and O.x denote the CLOSE and OPEN auxiliary contacts on the disconnector or
circuit breaker respectively as they appear in the Details dialog box. Where an disconnector or a circuit
breaker is only equipped with a single auxiliary contact, the One auxiliary contact mode must be
selected.
This mode is not recommended because the status of the disconnector or circuit breaker cannot be
properly monitored with just one auxiliary contact.
The signals are configured at the time the protection system is engineered and are generally not
changed subsequently.
Only the CLOSED signal field is visible when the One auxiliary contact mode is selected. The function
of the OPEN signal is achieved by inverting the CLOSED signal. In this case, we recommend connecting
the auxiliary contact supply to the corresponding input so that its integrity is supervised.
Inversion
The signals of optocoupler inputs can also be inverted.
Configuring events
Every signal can also be saved as an event in one or more event memories (see Technical Manual).
More check boxes and input fields appear when the Recording radio button is selected. They determine
whether the event is recorded on the positive or negative-going edge or on both edges. The user can
enter a text (up to 32 characters) defining the event, but if none is entered the system assigns a default
event text. At least one event memory in the Send event to (= save event in) field must also be selected
either in the CU and/or BU event memories. Furthermore, events can be assigned to the event lists of
IEC 60870-5-103 interbay bus (IBB) 1 or 2. As the 61850 model is implemented as defined by the
standard, no custom assignments can be made for the IBB associated with 61850.
Minimum input signal duration
Provision is made for prolonging the input signals in steps of 1 ms (reset delay).
New signal
IEC18000508 V1 EN-US
Figure 29:
The button New signal opens a dialog box with a list for selecting and adding a new signal.
Distributed busbar protection REB500
Operation manual
Configuration/ Binary module/ Inputs/ New signal
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Section 4
HMI500
39