KEB COMBIVERT F5, Operation Manual, Page: 8 / 138

8
Electrical Connections
CAUTION - RISK OF ELECTRIC SHOCK! Always disconnect supply
voltage before servicing the F5 Elevator Drive.
After disconnecting the supply voltage, always wait 5 minutes before
attempting to change the wiring. The internal DC BUS capacitors must
discharge.
Pay attention to the supply voltage and be sure the supply voltage matches
that of the inverter. A 240V unit can be supplied with voltage in the range
180 to /-0%, for a 480V unit the range is 305 to /- 0%,
48Hz to 62 Hz.
All 240V models are suitable for use on a circuit capable of delivering not
more than ___ kA rms symmetrical amperes, 240 volts maximum when pro-
tected by class ___ fuses rated ___ Amperes as specified in table 2.2.4.1 or
when protected by a circuit breaker having an interrupt rating not less than
___ kA rms symmetrical amperes, 240V maximum, rated ___ amperes as
specified in table 1.2.4.1.
All 480V models are suitable for use on a circuit capable of delivering not
more than ___ kA rms symmetrical amperes, 480 volts maximum when pro-
tected by class ___ fuses rated ___ Amperes as specified in table 1.2.4.2 or
when protected by a circuit breaker having an interrupt rating not less than
___ kA rms symmetrical amperes, 480V maximum, rated ___ amperes as
specified in table 1.2.4.2.
Connection of the F5 series inverters to voltage systems configured
as a corner grounded delta, center tap grounded delta, open delta, or
ungrounded delta, may defeat the internal noise suppression of the
inverter. Increased high frequency disturbance in the controller and
on the line may be experienced. A balanced, neutral grounded wye
connection is always recommended. The three phase voltage imbalance
must be less than 2% phase-to-phase. Greater imbalance can lead to
damage of the inverter’s power circuit.
A disconnect switch or contactor should be provided as a means of turning
off the supply voltage when the unit is not in use or when it must be ser-
viced.
Repetitive cycling on and off of the input supply voltage more than once
every two minutes can lead to damage of the inverter.
1.2. Electrical Connections
1.2.1. Safety First

1.2.2. Voltage Supply
i
1.2.3. Disconnect
Switch