3 × 440-480 V, MLE Model K
Motor size
[hp]
Recommended
[A]
Maximum
[A]
Fuse type
15 35 60 RK1, Class J or T UL listed fuse
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 protection for MLE Model J
When the pump is protected by a circuit breaker, the circuit breaker must be rated for a minimum voltage of 500 V. The circuit breaker must be
of the inverse-time type.
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 %.
A.5. Electrical connection
Installation altitude
For 480/277V grid systems: The maximum altitude is between 0
and 11480 ft (3500 m) above sea level.
For 480V (corner earthed) grid systems: The maximum altitude is
between 0 and 6560 ft (2000 m) above sea level.
Conductors
See the sections on electrical installation and cable requirements.
Conductor temperature ratings
Model J: Use minimum 140 °F (60 °C) copper conductors.
Model K: Use 167 °F (75 °C) copper conductors only. The wire
sizes for the supply mains must be sized for a wire size which is
suitable for at least 125% of the rated input current of the motor
drive units.
Recommended ring terminals
Ensure that the used ring terminals are UL certified.
The 480 V supply terminals are suitable for field wiring when used
with stranded wires and specific listed crimp terminals
manufactured by Tyco Electronics (E13288).
Cable cross-
section
Part number/
Designation
number
Manufacturer
[mm
2
]
[AWG]
16 6 130552 Tyco Electronics
10 8 160013 Tyco Electronics
6 10 130191 Tyco Electronics
Ethernet cable connection
The connection of Ethernet cables must be done by connecting the
Ethernet cable screen to an earth clamp on the terminal box, to be
in compliance with FCC and ISED requirements.
The recommended Ethernet cable types for earth clamp
applications are SF/UTP, S/FTP or SF/FTP, where the cable screen
consists of both a braided and a foil screen.
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 J
P2
Maximum line
reactor size
[mH]
[kW] [HP]
3500-4000 rpm
4000-5900 rpm
2.2 3 1.5
4 5 0.7
5.5 7.5 0.3
7.5 10 0.6
11 15 0.3
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 J: If a short circuit occurs, the motor can be used on a mains
supply delivering not more than 5000 RMS symmetrical amperes,
600 V maximum.
Model K: Suitable for use on a circuit capable of delivering not
more than 5000 rms symmetrical amperes, 480 V maximum when
protected by RK1, J or T Class fuses, rated 80 A, 600 V.
11
Appendix A
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