DEMA CPM 311, User Manual

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CPM 311 Control Unit: Front View
• Status LEDs
4 status LEDs are located on the front side of the CPM 311 Control Unit.
o
Trip: This LED reports the trip relay activity. The LED runs continuously if the trip relay is
closed at that time, and flashes if the trip occurred but the trip relay is then released.
o
Alarm: This LED reports the alarming events. The LED flashes if there are new alarms on
the alarm menu that has not been viewed by any user, and starts to run continuously if
the alarms are viewed but not reset.
o
Power: This LED reports the auxiliary supply status. If the auxiliary power supply is
healthy, the LED runs continuous green.
o
Warning: This LED reports the internal circuitry errors by running continuous red if any
internal errors are detected.
• Phase Protection LEDs
4 phase protection LEDs are located on the front side of the CPM 311 Control Unit.
o
Trip Θ: If the thermal overload protection (I
Θ
›) is activated, this LED will run continuously
red in case of thermal overload tripping.
o
I ›: If the phase overcurrent protection (I ›) is activated, this LED will run continuously red
in case of phase overcurrent tripping.
o
I ››: If the phase short-circuit protection (I ››) is activated, this LED will run continuously
red in case of phase short-circuit tripping.
•
Earth Protection LEDs
4 earth protection LEDs are located on the front side of the CPM 311 Control Unit.
o
I
e
›: If the earth overcurrent protection (I
e
›) is activated, this LED will run continuously red
in case of earth overcurrent tripping.
o
I
e
››: If the earth short-circuit protection (I
e
››) is activated, this LED will run continuously
red in case of earth short-circuit tripping.
• (124 x 64) px Graphics Screen
128 px x 64 px backlit graphics display provides a large viewing area that ensures easy operation
and readability.
• Multi-functional Buttons
Similar to cell phone technology, multifunctional buttons provide easy command and navigation
between the menus. The reset button in this group provides access to the programmable LEDs
and alarms menu, lets the user to reset alarm if any available and unlatch any outputs, if
applicable.
•
Unit Label
The inerasable label indicates the ordering code, serial number and other information to comply
with IEC standards.
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