Technical Guide P12y/EN FT/D22
User Guide
MiCOM P125/P126/P127 Page 75/108
4.6.2 Submenu Latch Relays
With this submenu the user can program trip functions so that the resulting output
signal will remain latched after the cause for exceeding the threshold has
disappeared.
4.6.2.1 Submenu Latch Relays for P125
With the following menu the user can set each output relay as latched or not latched.
A “0” assigned to an output relay means that the relay is not latched. The output
relay will be active when the relevant command will be active; the relay will not be
active when the relevant command will reset.
A “1” setting assigned to an output relay means that the relay is latched. The output
relay will be active when the relevant command will be active; the relay will remain
active, if the relevant command will reset.
The active latched output relays can be reset by a logic input assigned to this function.
Further, the active latched output relays can be reset from the front panel by pushing
0. This action is available if the window status Output Relays in OP. PARAMETERS
submenu is displayed.
The alarm string “Latched Relays” appears on LCD and the yellow LED is lighted.
AUTOMAT. CTRL
Heading of AUTOMAT. CTRL menu.
To gain access to the Latch Relays menu, press 2 and
6 until the submenu is reached.
Latch Relays
Heading of submenu.
To modify setting press 5.
Latch :87654321
01001000
To select output relay press 6. To confirm choice for
setting press 5. Then press 2 or 8 to select 0 or 1.
Press 5 to confirm setting choice.
NOTE: In the above window the output relays set to Latch function are
number 4 and 7 (RL4 & RL7).
The window for the P125 relay is shown below:
Latch :654321
011000
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