installation &
operating instructions
Design Envelope 4200h & 4280
End Suction Horizontal Pumping Units
11
1 Power supply (smps) including signal isolation of VDCbus,
indicating the intermediate voltage.
2 Gate drive that runs the IGBTs (opto couplers)
3 DCbus Voltage transducer (opto couplers)
4 Current transducers (Hall Eect-Based Current Sensor).
31
4
2
M
d earth leakage current
Earth leakage current is primarily caused by the capacitance
between motor phases and the motor frame. The rfi filter
contributes additional leakage current, as the filter circuit is
connected to earth through capacitors (Cy).
The size of the leakage current to the ground depends on the
following factors, in order of priority:
1 Switching pwm frequency
2 Motor grounded on site or not
The leakage current is of importance to safety during
handling/operation of the drive if (by mistake) the drive has
not been earthed.
e over voltage protection
The voltage in the intermediate circuit is increased when the
motor acts as a generator. This occurs in two cases:
1 The load generates energy.
2 During deceleration (ramp-down) if the moment of inertia
is high, the load is low and the ramp-down time is too short
for the energy to be dissipated as a loss in the motor fre-
quency converter, the motor and the installation.
The drive turns o to protect the igbt transistors and the
intermediate circuit capacitors when a certain voltage level is
reached on DCbus.
f mains supply interference/harmonics
A motor integral drive takes up a non-sinusoidal current from
mains. A non-sinusoidal current can be transformed by means
of a Fourier analysis and split up into sine wave currents with
dierent frequencies, i.e. dierent harmonic currents in with
50 Hz as the basic frequency.
Some of the harmonic currents might disturb communication
equipment connected to the same transformer or cause reso-
nance in connection with power-factor correction batteries.
To ensure low, harmonic currents, for the residential and com-
mercial environments, an optional harmonic filter is necessary.
2.2 electrical specification
Main supply (l1 l2 l3)
Supply frequency 48 - 62Hz
Supply voltage 1 × 200-230v ± 10% ,
3 × 200-230v ± 10% ,
3 × 380-480v ± 10%,
3 × 575-600v ± 10%
Max. imbalance of
supply voltage
± 2% of rated supply
Switching on
supply voltage
Once every 2 minutes
Output ratings
Output Current 100% Drive Rated Power continuously
Overload Capacity 150% for 60 secs
Digital inputs
Programmable
digital inputs
2
Voltage level 0-24Vdc (user selectable npn or pnp)
Analog input
Programmable
analog voltage input
1
Voltage level 0:10Vdc
Input resistance Rin 10KΩ
Resolution 12bit
Programmable
analog current inputs
1
Current range 0:20mA
Input resistance Rin 500Ω
Relay Output
Programmable relay
output
2 (n.o. n.c. com)
Max terminal load 250Vac 2A 500VA
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