3 Operating the SAMMS-LV Device

100000

10000

1000

Seconds

100

10

1

.1

.1

Motor running current at full load current

 

 

 

 

 

 

 

Loss of load

 

 

 

 

 

 

 

 

 

 

 

 

adjustable from

 

 

 

 

 

 

 

Jam protection

 

 

 

20 to 90% of

 

 

 

adjustable from

 

 

 

rated FLC

 

 

 

120 to 400% of FLC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Maximum

Class 5 curve

 

stall time

 

 

 

 

 

25 seconds

 

 

 

 

 

 

Jam and loss of load protection persistence delay (5 times overload class)

Motor starting current

600% rated full load current

1

6

10

Iratio

IFLC

Figure 3.10 Motor protection graph

21

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Image 23
Siemens MCC-3298 user manual Motor protection graph