Specification

Fr-e740-1.5k-cht is an economical and high-performance type, 3-phase 400V power
supply, and the motor capacity is * large and suitable for three standard 4-
pole motors!

Detailed parameters of fr-e740-1.5k-cht:

1. Power of fr-e740-1.5k-cht: 1.5kw

2. Current of fr-e740-1.5k-cht: 4A

3. Voltage of fr-e740-1.5k-cht: 3-phase 380 ~ 480v

4. Frequency of fr-e740-1.5k-cht: 50Hz / 60Hz

5. Allowable fluctuation range of voltage and frequency of fr-e740-1.5k-cht:
325 ~ 528v50hz / 60Hz (plus or minus 5%)

6. Power capacity of fr-e740-1.5k-cht: 4.5KVA

7. Overload capacity of fr-e740-1.5k-cht: 150% 60s, 200% 3S (inverse time
characteristic)
8. Installation dimension of fr-e740-1.5k-cht: 140mm * 150mm * 135mm

9. Approximate weight of fr-e740-1.5k-cht: 1.9kg

10. Cooling mode of fr-e740-1.5k-cht: forced air cooling


Selection method of fr-e740-1.5k-cht:


1. Fr-e740-1.5k-cht is selected according to the following load torque
characteristics and is divided into the following three categories:

(1) Constant torque load (2) Constant power load (3) Fluid load

2. Fr-e740-1.5k-cht is selected according to the control mode and is divided
into the following five categories:

(1) V / F open loop control (2) V / F closed loop control (3) Vector
control without speed sensor (4) Vector control with speed sensor (5) Direct
torque control

Fr-e740-1.5k-cht selects the protective structure according to the use and
installation environment:

The protective structure of fr-e740-1.5k-cht should adapt to its installation
environment, which requires consideration of environmental temperature,
humidity, dust, pH, corrosive gas and other factors, which is of great
significance to the long-term, stable, safe and reliable operation of fr-e740-
1.5k-cht. It is divided into the following four categories:

(1) Open type (2) Closed type (3) Sealed type (4) Closed
type
1. Select the frequency converter according to the load characteristics,


If the load is constant torque load, Siemens MMV / MDV frequency converter
shall be selected. If the load is fan and pump load, Siemens eco frequency
converter shall be selected.
2. When selecting the frequency converter, the actual motor current value shall
be used as the basis for the selection of the frequency converter, and the
rated power of the motor can only be used as a reference. In addition, it
should be fully considered that the output of the frequency converter contains
high-order harmonics, which will deteriorate the power factor and efficiency of
the motor. Therefore, the current of the motor increases by 10% and the
temperature rise increases by about 20% compared with the power frequency power
grid. Therefore, when selecting motor and frequency converter, this situation
should be taken into account and appropriate allowance should be reserved to
prevent excessive temperature rise from affecting the service life of motor.


3. If the frequency converter wants to run with a long cable, measures should
be taken to restrain the influence of the long cable on the ground coupling
capacitance to avoid insufficient output of the frequency converter. The
frequency converter shall be selected by amplifying the first gear, or the
output reactor shall be installed at the output end of the frequency converter.
Shanghai Mitsubishi fr-e740-1.5k-cht


4. When the frequency converter is used to control several motors in parallel,
the length of the motor cable and the allowable range of the frequency
converter must be considered. If the specified value is exceeded, the frequency
converter shall be selected by amplifying the first gear or the second gear. In
addition, in this case, the control mode of the frequency converter can only be
Vif control mode, and the frequency converter cannot protect the overcurrent
and overload protection of the motor. At this time, it is necessary to add a
fuse on each motor to realize the protection.