ABB RELION REF615R, Technical Manual

Page: 41 / 664

2.2.4 Programmable push buttons with LEDs
GUID-2210FFE5-7C08-4AA6-898A-5A39D3DDEAB3 V1 EN
Figure 7: Programmable push buttons with LEDs
The LHMI keypad on the left side of the protection relay contains 16 programmable push
buttons with red LEDs.
The buttons and LEDs are freely programmable, and they can be configured both for
operation and acknowledgement purposes. That way, it is possible to get
acknowledgements of the executed actions associated with the buttons. This combination
can be useful, for example, for quickly selecting or changing a setting group, selecting or
operating equipment, indicating field contact status or indicating or acknowledging
individual alarms.
The push buttons are enabled in units ordered with the “Enhanced OCI”
option. For ordering details, see the product guide. The push buttons are
available for customer use though disabled by factory default for the
LHMI options "A" and "C".
The LEDs can also be independently configured to bring general indications or important
alarms to the operator's attention.
The lowest two buttons with LEDs on top are typically used for hot-line tag for the
emergency operation of the circuit controlled by the protection relay.
To provide a description of the button function, it is possible to insert a paper sheet behind
the transparent film next to the button.
1MRS240050-IB C
Section 2
REF615R overview
REF615R 35
Technical Manual