Operating instructions

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Neo
Installation & Operating Instructions
Page 17
suitable; however in some cases type aR fuses may be
required. The operating time of the fuses must be below
0.5 seconds.
• Where allowed by local regulations, suitably dimensioned
type B MCB circuit breakers of equivalent rating may be
utilised in place of fuses, providing that the clearing capac-
ity is sufficient for the installation.
• When the power supply is removed from the drive, a mini-
mum of 30 seconds should be allowed before re-applying
the power. A minimum of 5 minutes should be allowed
before removing the terminal covers or connection.
• The maximum permissible short circuit current at the
Fenner QD:Neo Power terminals as defined in IEC60439-
1 is 100kA.
• An optional Input Choke is recommended to be
installed in the supply line for drives where any of the
following conditions occur:-
- The incoming supply impedance is low or the fault
level / short circuit current is high
- The supply is prone to dips or brown outs
- An imbalance exists on the supply (3 phase drives)
- The power supply to the drive is via a busbar and
brush gear system (typically overhead Cranes).
• In all other installations, an input choke is recommend-
ed to ensure protection of the drive against power
supply faults. Part numbers are shown in the table.
Supply Frame Size AC Input
Inductor
230 Volt 2 QCHOKE-2S
1 Phase 3 QCHOKE-3S
400 Volt 2 QCHOKE-2
3 Phase 3 QCHOKE-3
4.4. Operation of 3 Phase Drives from
a Single Phase Supply
A special function of the Fenner QD:Neo allows all
drives designed for operation on 3 phase supplies to be
operated on a single phase supply of the correct rated
voltage at up to 50% of the nominal capacity.
For Example, Model Number 575N4045 can be oper-
ated on a single phase supply, 380 – 480 volts, with the
maximum output current limited to 45 Amps
The supply should be connected to the L1 and L2 termi-
nals of the drive.
4.5. Drive and Motor Connection
• The motor should be connected to the drive U, V, and
W terminals using a suitable 3 or 4 core cable. Where a
3 core cable is utilised, with the shield operating as an
earth conductor, the shield must have a cross sectional
area at least equal to the phase conductors when they
are made from the same material. Where a 4 core cable
is utilised, the earth conductor must be of at least equal
cross sectional area and manufactured from the same
material as the phase conductors.
• The motor earth must be connected to one of the
Fenner QD:Neo earth terminals.
• For compliance with the European EMC directive, a
suitable screened (shielded) cable should be used.
Braided or twisted type screened cable where the
screen covers at least 85% of the cable surface area,
designed with low impedance to HF signals are rec-
ommended as a minimum. Installation within a suit-
able steel or copper tube is generally also acceptable.
• The cable screen should be terminated at the motor end
using an EMC type gland allowing connection to the mo-
tor body through the largest possible surface area
• Where drives are mounted in a steel control panel en-
closure, the cable screen may be terminated directly
to the control panel using a suitable EMC clamp or
gland, as close to the drive as possible.
• For IP55 drives, connect the motor cable screen to
the internal ground clamp
4.6. Motor Terminal Box Connections
Most general purpose motors are wound for operation
on dual voltage supplies. This is indicated on the name-
plate of the motor.
This operational voltage is normally selected when
installing the motor by selecting either STAR or DELTA
connection. STAR always gives the higher of the two
voltage ratings.
Incoming
Supply
Voltage
Motor
Nameplate
Voltages
Connection
230 230/400
Delta
400 400/690
400 230/400 Star