EMR-4000 IM02602009E
JAM
Elements
50J[1] ,50J[2]
Functional Description
When the motor is running, a current increase above normal load may be an indication of a malfunction in the load.
JAM protection recognizes mechanical problems, such as broken drive gears.
Refer to the JAM protection limit (the right vertical line in the “Underload and JAM Trip Function” curve example). In
this curve example, the JAM trip is set at 150% of FLA.
Underload and JAM Trip Function
The protective device can be configured for a JAM alarm and/or a JAM trip. There are two JAM elements:
•JAM1 50J[1]; and
•JAM2 50J[2].
They are located under the >>Protection Parma<< menu, under each setting group (Set 1 for example). It is suggested
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