Vfd installation considerations when dating.
Serendipitous encounters dating cooling of the VFD's heat sink is essential for successful operation.
All motors require overload protection. The sizing and installation of VFD line and load conductors should conform with the NEC and other appropriate local codes.
This voltage stability should be considered when running conductors to the drive and voltage drops should be calculated for long runs. Many VFDs have short-circuit protection usually in the form of fuses already installed by the manufacturer.
Vfd installation considerations when dating you must install VFDs in such areas, take steps to provide necessary cooling. This sensing is then interlocked dani si atat sweet flirt craciun the VFD's control circuit.
That's the book we always put aside until we have problems and need answers. VFD control units should be installed in locations where the maximum ambient temperature does not exceed 40 [degrees] C [degrees] F.
Be sure to torque-bolt fuses in place according to the manufacturer's specifications to assure fast operation of fuses in case of a fault.
Common sense, along with the manufacturer's guide lines and adherence to the appropriate code requirements, are all that is needed.
For Customers & Suppliers
There are several key factors that must be considered to ensure a proper VFD installation. These include electrical connections, grounding, fault protection, motor protection, and environmental parameters such as humidity and moisture.
Start-up by Facility Personnel Only. This is highly recommended for any motor that is to be operated for extended periods of time at low speeds.
Thus, the optimum protection for a motor is thermal sensing of the motor windings. This manual will give you important information about receiving, storage, and planning for the installation before the equipment arrives. For safe and dependable operation, all VFDs must be properly grounded.
In addition, a grounding conductor must be brought back from the motor to the VFD's internal grounding terminal. The drive installation procedure begins with a thorough reading of the drive's manual. These control signals must be run independently of each other as well as separate from any power wiring.
It's a good practice to make several copies of the manual; it seems they always end up in that great void with all the other lost manuals. There are several Solomon S.
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If higher ambients are expected, derating of the VFD may be required. Larger free-standing VFDs require minimum clearances around them for sufficient air flow to circulate through them, assuring adequate cooling. It's not unusual to have a V or 24V control circuit for start commands and a mA or VDC signal for speed control.
This normally calls for a grounding conductor to be brought back to a single-point grounding location, usually selected to be at the service.
If a wall-mounted unit is to be installed in a free-standing position, then plywood or a sheet of metal should be fastened to the back of the unit to ensure that chimney-effect cooling will be achieved. As such, you can avoid many problems by carefully planning your VFD installation prior to the actual work beginning.
A start-up procedure must be followed for the safe and correct start-up of the VFD. Altitude affects the heat dissipation capability of the heat sink and units in locations at ft m above sea level must be derated. Induced noises can produce erratic drive behavior that is very difficult to troubleshoot.
Basics Understanding Variable Speed Drives Part 3 Correct installation of variable frequency drives demands attention to vital factors such as location and environment, electrical connections grounding, supply voltage, and protective devices.
This is usually the case on larger hp units. Turkel May 01, Correct installation of variable frequency drives demands attention to vital factors such as location and environment, electrical connections grounding, supply voltage, and protective devices. This type of protection will respond to motor overcurrent conditions of an overloaded motor, but will not detect over-temperature conditions.
Control signal types can vary depending on the application. At this point in time you'll probably want to power-up the VFD and give it a test. Better yet, specify additional spare manuals for the drive with your order.
This is a common temperature rating for most units. You should avoid installing units in mezzanines, direct sunlight, or near external heat sources because these locations usually have unpredictable temperature rises.
In either case, the selection and sizing of these fuses is critical for semiconductor protection in the event of a fault.
As is the case with all electrical and electronic equipment, high humidity and corrosive atmosphere's are a concern. Cooling and line power quality considerations There are many important considerations for all industrial electronic equipment; however, the two most important are cooling and line power quality.
Most fatal VFD failures occur about now. Supply line power quality. If the installation is performed by outside contractors, a notice should be placed on the VFD reading: The manufacturer's recommendations must be followed when installing or replacing fuses for the VFD.
Completing the installation Installation of a VFD is no different than any other type of motor control. This direct motor ground to the VFD is required to minimize interference and for the ground-fault protection function of the drive to operate properly.
A motor operating at reduced speeds will have reduced cooling; as a result, it may fail due to thermal breakdown of the motor windings insulation.
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