Torques
See the section on torques.
Line reactors
The maximum line reactor size in front of the drive must not exceed the following values:
Model K
P2
Maximum line reactor size
[mH]
[kW] [HP] 3500-4000 rpm
15 20 0.2
18.5 25 0.2
22 30 0.2
Line reactors are often required for six-pulse variable speed drives. Please observe that the MGE, MLE utilize a small DC capacitor
concept for lower harmonics and exceeding the maximum inductance may cause resonance between reactor and the MGE, MLE
that will reduce the lifetime of the product.
Short-circuit current
Model K: Suitable for use on a circuit capable of delivering not more than 5000 rms symmetrical amperes, 480 V maximum when protected by
J or T Class fuses, rated 80 A, 600 V.
Fuses
Fuses used for motor protection must be rated for minimum 600 V.
For fuse sizes, see the section on recommended size of fuses.
3 × 440-480 V, MLE Model K
Motor size
[hp]
Recommended
[A]
Maximum
[A]
Fuse type
20 50 80 RK1, Class J or T UL listed fuse
25 60 80 RK1, Class J or T UL listed fuse
30 70 80 RK1, Class J or T UL listed fuse
Branch circuit short-circuit protection
For the USA
Integral solid state short-circuit protection does not provide branch circuit protection. Branch circuit protection must be provided in accordance
with the National Electrical Code and any additional local codes, or the equivalent.
For Canada
INTEGRAL SOLID STATE SHORT-CIRCUIT PROTECTION DOES NOT PROVIDE BRANCH CIRCUIT PROTECTION. BRANCH CIRCUIT
PROTECTION MUST BE PROVIDED IN ACCORDANCE WITH THE CANADIAN ELECTRICAL CODE, PART I.
Overload protection
Degree of overload protection provided internally by the drive, in percent of full-load current: 102 %.
72
Appendix B
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