Emerson E300 Series - Page 209

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E300 Design Guide 209
Issue Number: 1
If Motor Rated Current (B02) > Maximum Heavy Duty Rating (J05) then K
1
is defined as shown below. Two different characteristics are provided, but
in both cases the motor performance is limited at lower speeds and the permissible overload is reduced from 105 % to 101 %.
1.0
1.05
0.707
1.0
1.05
K
1
1.00.5
1.00.5
K
1
when Motor Rated Current (B02) Maximum Heavy Duty Rating (J05)
Proportion ofRated Frequency(B06) for Open-loop mode
Proportion ofRated Speed(B07) for RFC-A/RFC-S modes
Proportion ofRated Frequency(B06) for Open-loop mode
Proportion ofRated Speed(B07) for RFC-A/RFC-S modes
K
1
Low Speed Thermal
Protection Mode(B44) = 0
Low Speed Thermal
Protection Mode(B44) = 1
1.0
1.01
0.707
1.0
1.01
K
1
1.00.5
1.00.15
K
1
when Motor Rated Current (B02) > Maximum Heavy Duty Rating (J05)
Proportion ofRated Frequency(B06) for Open-loop mode
Proportion ofRated Speed(B07) for RFC-A/RFC-S modes
Proportion ofRated Frequency(B06) for Open-loop mode
Proportion ofRated Speed(B07) for RFC-A/RFC-S modes
K
1
Low Speed Thermal
Protection Mode(B44) = 1
Low Speed Thermal
Protection Mode(B44) = 0
0.707