Saftronics FP5 Series User Manual page 22

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Chapter 1 - Receiving & Installation
Wiring
· Surge Suppressor
For inductive loads (i.e. magnetic contactors, magnetic relays, magnetic
valves, solenoids, magnetic brakes, etc.) connected near the inverter,
use a surge suppressor across the coils to limit the transients on the sup-
ply lines.
Output Wiring
· Motor Connection
Connect motor lead wires to output terminals T1, T2 and T3. Verify that
the motor rotates in the forward direction (CCW: counterclockwise
when viewed from the motor load side) with the forward run command.
If the motor rotation is incorrect, exchange any two of the motor leads.
· Magnetic Starter
Do not connect a magnetic starter or a magnetic contactor to the output
circuit. If the motor load is connected or disconnected while the inverter
is running, the inverter overcurrent protective circuitry may trip.
· Thermal Overload Relay
An electronic overload protective function (I
inverter. However, when driving several motors with one inverter, or
when switching between multiple windings of a multiple winding
motor, use an external thermal overload relay(s). In this case, set param-
eter n034 to "Disabled".
· Wiring Distance Between Inverter and Motor
If the total wiring distance between inverter and motor is excessively
long and the inverter carrier frequency (IGBT switching frequency) is
high, harmonic leakage current from the wiring will adversely affect the
inverter and peripheral devices. If the wiring distance is long, reduce
the inverter carrier frequency as described below. Carrier frequency can
be set by parameter n054.
Wiring Distance Between Inverter and Motor
Wiring Distance between
Inverter and Motor
Carrier Frequency *
(Set value of parameter n054)
* Increasing the carrier frequency above the factory default value requires
current derating. Contact your Saftronics representative for details.
22
2
t) is incorporated into the
Up to 164 ft. Up to 328 ft.
(50m) (100m)
15kHz or less 10kHz or less
(6) (4)
FP5/GP5 User's Manual
More than 328 ft.
(100m)
5kHz or less
(2)