gefran BDI50 Series User Manual page 27

3.3.6 Considerations for peripheral equipment
Power
Circuit Breaker
& RCD
Magnetic
contactor
AC reactor for
power
improvement
Input noise
filter
Inverter
Motor
(
(For detailed information for the above peripheral equipment refer to Chapter 6).
Ensure that the supply voltage is correct.
A molded-case circuit breaker or fused disconnect
must be installed between the AC source and the
inverter
Use a molded-case circuit breaker that conforms to
the rated voltage and current of the inverter.
Do not use the circuit breaker as the run/stop switch
for the inverter.
Residual Current Circuit Breaker(RCD)
Current setting should be 200mA or above and the
operating time at 0.1 second or longer to prevent
malfunctions.
Normally a magnetic contactor is not needed.
A contactor can be used to perform functions such as
external control and auto restart after power failure.
Do not use the magnetic contactor as the run/stop
switch for the inverter.
When a 200V/400V inverter with rating below 11 kW is
connected to a high capacity power source (600kVA or
quality
above) then an AC reactor can be connected for
power factor improvement and reducing harmonics.
BDI50 inverter has a built-in filter first Environment.
(Category C2 or C3, see paragraph 3.3.4).
To satisfy the required EMC regulations for your
specific application you may require an additional
EMC filter.
Connect the single phase power to Terminals, L1(L) &
L3(N) and three phase power to Terminals : (200V :
L1(L),L2,L3(N) or 400V : L1,L2,L3)
Warning! Connecting the input terminals T1, T2, and
T3 to AC input power will damage the inverter.
Output terminals T1, T2, and T3 are connected to U,
V, and W terminals of the motor.
To reverse the motor rotation direction just swap any
two wires at terminals T1, T2, and T3.
Ground the Inverter and motor correctly.
Ground Resistance for 200V power<100 Ohms.
Three-phase induction motor. Voltage drop on motor
due to long cable can be calculated.
Volts drop should be < 10%.
Phase-to-phase voltage drop (V) =
3 ×resistance of wire (Ω/km)×length of line
(m)×current×10
Note: when motor cables are longer than 100m, it is
recommend to use external output choke.
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