Relay Rear Panel; Hotkey Functionality; Function Key Functionality; Under The Top Hinged Cover - GE MiCOM P40 Agile Technical Manual

P44x/EN GS/Hb6
(GS) 3-6
Hotkey functionality (Figure 1):
• SCROLL: Starts scrolling through the various default displays.
• STOP: Stops scrolling the default display
for control of setting groups, control inputs and circuit breaker operation.
Function key functionality (Figure 1):
• The relay front panel, features control pushbutton switches with programmable LEDs
that facilitate local control. Factory default settings associate specific relay functions
with these 10 direct-action pushbuttons and LEDs e.g. Enable/Disable the auto-
recloser function. Using programmable scheme logic, the user can readily change the
default direct-action pushbutton functions and LED indications to fit specific control
and operational needs.

Under the top hinged cover:

• the relay serial number, and the relay's current and voltage rating information*.
Under the bottom hinged cover:
• battery compartment to hold the ½ AA size battery which is used for memory
back-up for the real time clock, event, fault and disturbance records.
• a 9-pin female D-type front port for communication with a PC locally to the relay
(distance of up to 15m) via an EIA(RS)232 serial data connection.
• a 25-pin female D-type port providing internal signal monitoring and high speed local
downloading of software and language text via a parallel data connection.
The fixed function LEDs on the left hand side of the front panel are used to indicate the
following conditions:
• Trip (Red) indicates that the relay has issued a trip signal. It is reset when the
associated fault record is cleared from the front display. (Alternatively the trip LED can
be configured to be self-resetting)*.
• Alarm (Yellow) flashes to indicate that the relay has registered an alarm. This may be
triggered by a fault, event or maintenance record. The LED will flash until the alarms
have been accepted (read), after which the LED will change to constant illumination,
and will extinguish when the alarms have been cleared.
• Out of service (Yellow) indicates that the relay's protection is unavailable.
• Healthy (Green) indicates that the relay is in correct working order, and should be on
at all times. It will be extinguished if the relay's self-test facilities indicate that there is
an error in the relay's hardware or software. The state of the healthy LED is reflected
by the watchdog contact at the back of the relay.
To improve the visibility of the settings via the front panel, the LCD contrast can be adjusted
using the "LCD Contrast" setting with the last cell in the CONFIGURATION column.
1.2.2

Relay rear panel

The rear panel of the relay is shown in Figure 2 (refer to section P44x/EN IN 'Installation' for
terminals connections layout). All current and voltage signals, digital logic input signals and
output contacts are connected at the rear of the relay. Also connected at the rear is the
twisted pair wiring for the rear EIA(RS)485 communication port, the IRIG-B time
synchronising input and the optical fibre rear communication port which are both optional. A
second rear port (Courier) and an interMiCOM port are also available.
Getting Started
MiCOM P40 Agile P442, P444