Protection indicators
The protection indicator LEDs are Ready, Start/Pickup and Trip.
Table 1. Ready LED
| LED state |
Description |
| Off |
Auxiliary supply voltage is disconnected. |
| On |
Normal operation. |
| Flashing |
Internal fault has occurred or the protection relay is in test mode. Internal faults are accompanied by an indication message. |
Table 2. Start/Pickup LED
| LED state |
Description |
| Off |
Normal operation. |
| On |
A protection function has started and an indication message is displayed.- If several protection functions start within a short time, the last start is indicated on the display.
|
| Flashing |
A protection function is blocked or the protection relay is in the test and blocked mode.- The blocking indication disappears when the blocking is removed or when the protection function is reset.
|
Table 3. Trip LED
| LED state |
Description |
| Off |
Normal operation. |
| On |
A protection function has tripped and an indication message is displayed.- The trip indication is latching and must be reset via communication or by pressing
 . - If several protection functions trip within a short time, the last trip is indicated on the display.
|
Alarm indicators
The 11 matrix programmable LEDs are used for alarm indication. All the programmable LEDs on the LHMI have two colors, green and red. For each LED, the different colors are individually controllable. The default color for alarm is red. The green color can indicate, for example, normal status or normal operation.
Table 4. Alarm indications
| LED state |
Description |
| Off |
Normal operation. All activation signals are off. |
| On |
- Non-latched mode: activation signal is still on.
- Latched mode: activation signal is still on, or it is off but has not been acknowledged.
- Latched flashing mode: activation signal is still on but has been acknowledged.
|
| Flashing |
- Non-latched flashing mode: activation signal is still on.
- Latched flashing mode: activation signal is still on, or it is off but has not been acknowledged.
|