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38
4. Signaling
of protection
unit state
LED 1 and LED 2
The state of the protection unit is signaled through LED 1 and 2, according to the next table:
Signaling:
An alarm is more important than a prealarm. The overload is more important than over temperature
LED 3:
Failure by earth fault
(only for MP4/TA)
LED 4:
Failure by short circuit /
instantaneous short circuit
LED 5:
Failure by overload/
overtemperature
Protection
Led 1
Led 2
Inactive
Switched off
Switched off
Active
(I≥100A or supplied)
Green Fix
Switched off
Active: (overload
pre alarm (I>0,9Ir)
Green Fix
Red
Fix
Active: (overload
alarm I>1,05Ir)
Green Fix
Red Flashing
Active: over temperature
alarm (T>75°C)
Green Flashing
Red Flashing
LED 1
LED 2
LED 3
LED 4
LED 5
LED 1
LED 2
LED 3
LED 4
LED 5
In case of breaker tripping the led corresponding to the protection that caused the tripping remains
lighted, signalling the corresponding fault has occured. (if auxiliary supply is present)
Summary of Contents for Megabreak MP4 Series
Page 2: ...2 Protection unit MP4 Megabreak IT EN ITALIANO 3 ENGLISH 33 ...
Page 32: ...32 ...
Page 50: ...50 To come back to the upper level of menu push C To scroll up push 49 ...
Page 52: ...52 To come back to the upper level of menu push C To scroll up push Overtemp 51 ...
Page 54: ...54 To come back to the upper level of menu push C To scroll up push In Absent 53 55 ...
Page 58: ...58 To come back to the upper level of menu push C To scroll up push 2 7 X ...
Page 62: ...62 ...
Page 63: ...Protection unit MP4 Megabreak Installation manual 63 ...