ABB Unitrol 1000-PM40 - Protective Functions, Alarms; CAN Communication Loss Protection; Temperature and Current Protection; ICL Fault Handling

Document number Lang. Rev. ind. Page
ABB Switzerland Ltd
3BHS200200 E80
en A 12
2.3.4 Protective Functions, Alarms
Event Description
Interruption of CAN
communication for
100 ms during
Excitation ON
An internal shutdown occurs after 100 ms.
This shutdown and the alarm signal can be reseted only by turning off and
restarting the supply voltage Upwr.
Heat sink temperature

95 °C
An internal shutdown occurs, when heat sink temperature reaches 95 °C.
This shutdown and the alarm signal can be reseted only by turning off and
restarting the supply voltage Upwr.
Heat sink temperature

80 °C
Alarm signal, when the heat sink temperature reaches 80 °C.
Excitation current

80 A
Alarm signal after 10 s overcurrent.
Second alarm signal If the alarm signal is already active, the LED alarm lights off for 1 s and the
relay contact drops for 1 s, if a new alarm signal occurs.
Alarm inactive - CAN Bus connection active,
- No internal shutdown active,
- Peak value of the excitation current < 75 A (15 minutes after response),
- Heat sink temperature < 75 °C (15 minutes after response).
Alarm relay output,
Alarm LED display
The alarm signal from the relay output or the LED display is identical.
ICL recovery faults
ICL= Inrush current
limiter
An internal shutdown occurs, when the ICL was activated because of inrush
current above 250 A and the SW can not restart the unit.
This shutdown and the alarm signal can be reseted only by turning off and
restarting the supply voltage Upwr.
2.3.5 Display LED’s
LED Description
Power ON, green LED lights up, when the power module is powered on and the DC-link
voltage is higher than 11 V DC.
Excitation ON, green LED lights up, when the excitation command is received from CAN Bus.
LED blinks, if there is no CAN Bus connection.
Overcurrent, red LED lights up, when the excitation current peak reaches 80 A.
LED keeps blinking for 15 minutes before it turns off, when the peak current
has dropped below 75 A.
Overtemperature, red LED lights up, when the heat sink temperature reaches 80 °C.
LED keeps blinking for 15 minutes before it turns off, when the temperature
has dropped below 75 °C.
Alarm, red See Protective Functions, Alarm, section 2.3.4