WEG CFW300 User Manual - page 24
CFW300 | 19
E
ng
lis
h
Installation and Connection
3.3.1 Control Connections
1. Shielded output cables (motor cables) with the shield connected at both ends, motor and
inverter, with low-impedance connection for high frequency.
Maximum motor cable length and conducted and radiated emission levels according to
2. Shielded control cables, and keep them away from other cables according to table 3.2 of
the user's manual.
3. Grounding of the inverter according to instructions of item
Item 3.2.4 Grounding Connections
.
4. Grounded power supply.
5. Use short wiring to ground the external filter or inverter.
6. Ground the mounting plate using a flexible braid as short as possible. Flat conductors have
lower impedance at high frequencies.
7. Use sleeves for cable conduits whenever possible.
3.3.2 Emission and Immunity Levels
Table 3.3: Emission and immunity levels
EMC Phenomenon
Basic
Standard
Level
Emission:
Mains Terminal Disturbance Voltage
Frequency Range: 150 kHz to 30 MHz
IEC/EN 61800-3
It depends on the inverter model on the length of the
motor cable. Refer to
Electromagnetic Radiation Disturbance
Frequency Range: 30 MHz to 1000 MHz
Immunity:
Electrostatic Discharge (ESD)
IEC 61000-4-2
4 kV for contact discharge and 8 kV for air discharge
Fast Transient-Burst
IEC 61000-4-4
2 kV / 5 kHz (coupling capacitor) input cables
1 kV / 5 kHz control cables and remote HMI cables
2 kV / 5 kHz (coupling capacitor) motor cables
Conducted Radio-Frequency
Common Mode
IEC 61000-4-6
0.15 to 80 MHz; 10 V; 80 % AM (1 kHz)
Motor, control and remote HMI cables
Surges
IEC 61000-4-5
1.2/50 μs, 8/20 μs
1 kV line-to-line coupling
2 kV line-to-ground coupling
Radio-Frequency Electromagnetic
Field
IEC 61000-4-3
80 to 1000 MHz
10 V/m
80 % AM (1 kHz)
Definition of Standard IEC/EM 61800-3: "Adjustable Speed Electrical Power Drives
Systems"
Environments:
First Environment: environments that include domestic installations, as well as establishments
directly connected without intermediate transformer to a low-voltage power supply network
which supplies buildings used for domestic purposes.