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Universal Motor Controller
UMC100-FBP
V 6
Technical Description
4 Configuring the Motor Protection Functions
In this chapter you ind information on how to conigure the different UMC protection functions.
The following topics are covered:
Function and parameters of the electronic overload protection, the thermal memory and points to
consider if the motor is started cyclically (e.g. S3 motor operation mode)
•
Locked rotor protection during motor start
•
Overcurrent and undercurrent protection during normal operation
•
Imbalance protection
•
Phase loss protection
•
Thermistor motor protection
•
Earth fault protection with auxiliary device CEM11-FBP
Protection functions can be either on or off. If switched on, they can trigger a protection trip or a warning
only (excluding the thermal overload which is always active and triggers a trip). For some functions an op-
tional delay can be speciied. Some protection functions are only active after motor start-up while others
are active during motor start.
Below is an overview of the available protection functions. For details see the following sections.
Protection Function
Electronic Overload
Electronic Overload
Prewarning
Locked Rotor
High Current
Low Current
Imbalance
Phase Loss Protection
PTC Protection
Earth Fault Protection
Load Shedding / Volt-
age DIP
The motor-related and protection-related parameters shall be set according to the motor manufacturer's
data sheet. Other parameters of the UMC shall be carefully selected based on the process and the sys-
tem requirements.
Automatic Reset of Protection Faults
The setting of the "Fault autoreset" parameter determines how the UMC manages protection trips.
•
Off (the default setting):
LCD panel, ieldbus or the multifunction inputs DI0-DI if conigured.
•
On: A protection trip is automatically acknowledged without intervention of a human operator if the trip
condition has gone (e.g. cooling time over).
FieldBusPlug / Issue: 11.009
When active
Always
Always
During motor start
After motor start
After motor start
Always (Motor current >
60% of I
and all three
e
phases available)
Always (Motor current >
60% of I
)
e
Always
Conigurable
Always
The motor start-up period ends when the motor current drops to 135% of Ie or if the class
time (i.e. Class 5 -> 1.5 s, Class 10 -> 3 s , class 0 -> 6s, class 30 -> 9s, class 40 -> 1s)
is over. The class time begins with the start command.
A protection trip must be acknowledged from the user. This can be done via
Available Options:
Warning/Trip/Off
Trip
Warning
Trip
Separate warning and trip
levels /Off. Optional delay.
Separate warning and trip
levels / Off. Optional delay.
Separate warning and trip
levels / Off. Optional delay.
Trip, Off
Trip, Warning, Off
Trip, Warning, Off
See subsection voltage DIP
- 33 -
Automatic Fault
Reset Possible
Yes
-
-
-
-
Yes
-
Yes (
excluding PTC
wire break and short
circuit)
-
-
UMC100-FBP
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