ABB RELION REB500 Operation Manual page 75

1MRK 500 132-UUS Rev. B
The test generator is used in conjunction with the Status of binary inputs/outputs dialog box (has to be
opened by the operator), (see
When the test generator is active, the statuses of the tripping commands cannot change.
IEC18000502 V1 EN-US
Figure 57:
Table 17:
Button
Unblock all relays
Block all relays
Force security events
Block all tripping relays
Reset all overridden
relays
1) These listed signals have precedence compared to other signals configured to the same output channel, that us the
channel is not blocked after a test generator activation.
Distributed busbar protection REB500
Operation manual
Section
Test mode
Buttons in Test mode dialog box
Description
Restores the relays to normal operation and their statuses can change
again.
Prevents the statuses of all relays for which outputs have been configured
from being changed.
See Cyber security guideline.
Prevents the statuses of all relays from being changed with the exception of
41810_In service, 41835_Test generator active, 41410_Output relays
blocked, 21805_In service and 21410_Output relays blocked.
Returns all inputs and outputs which had statuses impressed on them for
test purposes to their original states.
An output relay can be set or reset either directly (for example, by setting an output
relay) or indirectly (for example, via an input or by a protection function).
The greatest care must be taken when using the test mode, especially when the
protection system is in operation.
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4.5.4).
12000095-IEC18000502-1-en.vsdx
1)
Section 4
HMI500
69