IMPULSE
®
•G+ & VG+ Series 4 Technical Manual
November 2020
Page 12
1.2 General Information
1.2.1 Assessing the System Requirements
It is important to know how the VFD will be utilized before installation. Please know the requirements for the
following components:
• Speed control method(s) - i.e. stepped, stepless, infinitely variable
• Braking method(s) - coast to stop, decel to stop, No Load Brake (NLB) Hoist
• Power source voltage, number of phases, and kVA rating
• Power source location
•Wire size
• Grounding location and method
• Control wiring sources - i.e., cab, pendant, radio
1.2.2 Assessing the VFD Environment
When choosing a location for IMPULSE
®
•G+ & VG+ Series 4, perform the following steps:
1. Ensure that a three-phase 200 to 240 VAC 50/60 Hz power supply is available for a 230 VAC-rated VFD, a
three-phase 380 to 480 VAC 50/60 Hz power supply is available for a 460 VAC-rated VFD, and a 500 to 600
VAC 50/60 Hz power supply is available for a 575 VAC-rated VFD.
2. Ensure the encoder (if required) is supplied with +5 VDC or 12 VDC.
3. If the RMS encoder current requirement is greater than 200 mA, provide an auxiliary power supply.
4. Ensure that the VFD-to-motor wiring distance is less than 150 ft. unless appropriate reactors, filters, and/or
inverter duty motor is used.
5. Ensure that the VFD is protected or isolated from:
• Ambient temperatures outside the range of +14°F to +140°F (-10°C to +60°C).
• Rain or moisture
• Corrosive gases or liquids
• Direct sunlight
• Severe mechanical vibration
6. Ensure that the VFD is housed in an appropriate NEMA-rated enclosure.
7. For severe-duty applications (long lifts, for example), ensure that the VFD control system (including dynamic
braking resistors) is adequately cooled, even though the ambient temperature limit is not exceeded. For more
information, contact Magnetek.
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