Rockwell Automation SP500 AC Drive Installation and Operation Manual - Manual (Page 45)

Installing the Drive 4-7
• Do NOT use an input isolation transformer rated more than 100 KVA for 230 VAC (or
1000 KVA for 460 VAC) with less than 5% impedance directly ahead of the drive
without additional impedance between the drive and the transformer.
If your SP500 application requires the use of an output transformer, contact Reliance
Electric for assistance.
4.3.4 Output Contactors
Output contactors provide a positive means of disconnecting the motor from the drive.
If your SP500 application requires the use of output contactors, contact Reliance
Electric for assistance.
4.3.5 Mechanical Motor Overload Protection
To provide the motor with overload protection, local, national, and international codes
(for example, NEC/CEC) require that a motor thermostat, internal to the motor, be
installed or an electronic thermal motor overload relay, sized to protect the motor, be
installed between the motor and the drive’s output terminals.
The Electronic Thermal Overload parameter (F-14) may be used in place of the
electronic thermal motor overload relays in single motor applications. Note, however,
that temperature-sensing devices integral to the motor are the best way of thermally-
protecting AC motors under all conditions. Parameter F-14 must be enabled to provide
overload protection. Refer to section 8.3 for the parameter description.
In multiple motor applications, each motor must have its own user-supplied overload
protection.
4.4 Setting the Analog Input Jumper on the Regulator
Board
SP500 drives have an analog speed reference input. This is a jumper-selectable 0 to
10 VDC or 0 to 20 mA input with programmable gain and offset adjustments
(parameters F-11 and F-12). Jumper J6 on the Regulator board is set to match the
type of incoming analog signal, either voltage or current. See figures 2.2, 4.5, and 5.3.
Refer to section 5.2.1 for more information.
!
ATTENTION: Any disconnecting means wired to drive output terminals
U, V, and W must be capable of disabling the drive if opened during drive
operation. If opened during drive operation, the drive will continue to
produce output voltage between U, V, W. An auxiliary contact must be
used to simultaneously disable the drive or output component damage
may occur.