Checking The Isolator And Circuit-Breaker Auxiliary Contacts; Checking The Manual Close Command - ABB RELION REB500 Commissioning Manual

Section 3
Commissioning
ABB principle:
closed
open
Current measurement
not OPEN= CLOSED:
closed
open
Current measurement
(When both isolator position
inputs are inverted)
IEC18000342 V1 EN-US
Figure 1:
Inverting the logic means that local events are generated while a bay unit is starting that signal
a change of input status that did not take place. Correct operation is nevertheless unimpaired.
3.2.6.2

Checking the isolator and circuit-breaker auxiliary contacts

Check the timing sequence of the isolator auxiliary contacts by inspecting the construction of
the isolator or assessing it from the respective data sheet.
Verify the operation of the
1. According to the circuit diagram and
2. by physically opening and closing the isolator. A check can be done in one of the following
ways:
•
•
•
3.2.6.3

Checking the manual CLOSE command

The local HMI is the best way of checking the circuit-breaker CLOSE command, because the
signal is generated only briefly and the local HMI is refreshed the quickest. The corresponding
menu item is
10
Isolator
Switching sequence of auxiliary contacts
CLOSED and OPEN contacts:
Menu item View/Switchgear objects
Menu item View/Binary input/output status
Menu item View/Single-line diagram
Measurements/Inputs .
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open
closed
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1MRK 505 401-UEN B
open
14000042-IEC18000342-1-en.vsd
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Distributed busbar protection REB500
Commissioning manual