Instruction manual

INSTALLATION AND WIRING
35
•
Data line filter
Noise entry can be prevented by providing a data line filter for the detector cable etc.
Example Data line filter: ZCAT3035-1330 (TDK make)
ESD-SR-25 (Tokin make)
Impedance specifications (ZCAT3035-1330)
Impedance (
Ω
)
10 to 100MHz 100 to 500MHz
80 150
The above impedance values are reference values
and not guaranteed values.
34
±
1
TDK
39
±
1
Product name Lot number
φ
30
±
1
Cable fixing band
mounting section
φ
13
±
1
Outline Dimension Drawing (ZCAT3035-1330)
[Unit : mm]
•
Data examples
By decreasing the carrier frequency, the noise terminal voltage*
can be reduced. Use Pr. 72 to set the carrier frequency to a low
value (1kHz).
Though motor noise increases at a low carrier frequency,
selection of Soft-PWM in Pr. 240 will make it unoffending.
Differences between Noise Terminal Voltages
at Different Carrier Frequencies
0.1 0.3 0.5 1 3 5 10 30
20
60
80
100
120
0
FR-A520-3.7K
fc=0.7kHz
fc=14.5kHz
fc=2.0kHz Soft-PWM(Factory setting)
FR-A220E-3.7k fc=(14.5kHz)
Conditions
Motor: 3.7kW (5HP)
Average terminal voltage 0dB=1µV
120dB=1V
Noise terminal voltage (dB)
Noise frequency (MHz)
By decreasing the carrier frequency, noise will be about as low
as that of our conventional FR-Z200 series.
By using shielded cables as signal cables, induction noise can
be reduced greatly (to 1/10 - 1/100). Induction noise can also be
reduced by moving the signal cables away from the inverter
output cables. (Separation of 30cm (11.81 inches) reduces noise
to 1/2-1/3.)
By fitting the FR-BSF01 or BLF on the inverter output side,
induction noise to the signal cables can be reduced.
Noise Terminal Voltage of Inverter and Example
of Its Reduction by Noise ilters
0.1 0.3 0.5 1 3 5 10 3
0
20
60
80
100
120
0
FR-A520-3.7k(fc=0.7kHz)
FR-Z220-3.7K
Noise frequency (MHz)
Noise terminal voltage (dB)
Conditions
Motor:3.7kW (5HP)
Average terminal voltage 0dB=1µV
120dB=1V
Noise Induced to Signal Cables by Inverter Output Cables
20
40
60
80
100
10
0
20 30 40 50
5cm
d(cm)
FR-BLF
FR-BSF01
(4T)
Line-to-line distance, d (cm)
Induction voltage (dB)
Parallel cable
Twisted pair cable
Coaxial cable
Conditions
Inverter: FR-A520-3.7K
Motor: FR-JR 4P 3.7kW (5HP)
Output frequency: 30Hz
Noise form: Normal mode
Inverter
Motor
Terminal
Measuring instrument
*Noise terminal voltage: Represents the magnitude of noise propagated from the inverter to the power supply.