Magnetek IMPULSE VG+ Series 3, Instruction Manual, Page: 9 / 183

IMPULSE•VG+ Series 3 Instruction Manual - 07/25/05
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Introduction
Assessing the System Requirements
It is important to know how you’re going to use the drive before you start installation and wiring.
You will need to know your requirements for the following components:
• Speed control method(s)
• Braking method(s)
• Power source voltage, number of phases, and kVA rating
• Power source location
• Wire size
• Grounding location and method
Assessing the Drive Environment
When you choose a location for IMPULSE•VG+ Series 3, perform the following steps:
1. Ensure that a 220V or 230V (-15% to +10%) three-phase power source is available for a 230V-
rated drive, and that a 380V, 400V, 415V, 440V, or 460V (-15% to +10%) three-phase power
source is available for a 460V-rated drive.
2. Ensure the encoder is supplied with +12VDC.
3. If the amperage requirement is greater than 200 mA, provide an auxiliary power supply to the
encoder.
4. Ensure that the drive-to-motor wiring distance is less than 250 ft. unless appropriate reactors
and/or filters are used.
5. If required, install reactors.
When connecting a drive (230V/460V, Model 2085-FVG+/4045-FVG+ and smaller) to
a large-capacity power supply transformer (500kVA or greater or more than 10 times the
inverter kVA rating), or when switching a phase-advancing capacitor, excessive peak
current can flow through the input power supply circuit. To prevent damage to the recti-
fier section in such cases, install a DC reactor between drive Terminals 1 and 2, or an
AC reactor on the input side. Installing reactors also improves the power factor on the
power supply side.
6. Ensure that the encoder wiring is less than 300 feet, unless fiber optic cables are used.
7. Ensure that the encoder wiring is isolated from the power wiring.
8. Ensure that the encoder wiring shield is grounded only at drive end.
9. Ensure that the drive circuit wiring is protected or isolated from:
• Ambient temperatures outside the range of +14° F to +113° F (-10° C to +45° C). (Consult
Electromotive Systems if you must exceed this temperature range.)
• Rain or moisture
• Corrosive gases or liquids
• Direct sunlight
• Severe mechanical vibration
10. Ensure that the drive is housed in an appropriate NEMA-rated enclosure.
11. For severe-duty applications (for example—long lifts) or with 75-Hp-or-greater motors, ensure
that the drive control system is adequately cooled, even though the ambient temperature limit is
not exceeded. For more information, contact Electromotive Systems.