Hitachi L100 IP Series Instruction Manual page 5

N EMC (
OTES ON ELECTRO MAGNETICAL COMPATIBILITY
WARNING This equipment should be installed, adjusted and serviced by qualified personnel
familiar with construction and operation of the equipment and the hazards
involved. Failure to observe this precaution could result in bodily injury.
When using L100IP series inverters in EU countries, the EMC directive 89/336/EEC must be observed. To
satisfy the EMC directive and to comply with the standard, the following provisions should be obeyed:
A) Environmental conditions for the inverter:
•
Ambient temperature: -10°C to 40°C.
•
Relative Humidity: 20% to 90% (no dew condensation)
•
Vibrations: max. 5,9m/s
•
Location: 1000 meter or less altitude, indoors (no corrosive gas or dust).
B) The power supply to the L100IP inverter must conform to the conditions stated below. If one of the
conditions mentioned is not satisfied then an appropriate L100IP AC reactor will have to be installed.
•
Voltage fluctuation +/-10% or less
•
Voltage unbalance +/-3% or less
•
Frequency variation +/-4% or less
C) Wiring
•
Shielded wiring (screened cable) is required for motor wiring, and total length has to be kept to less
than 50m. When using motor cables longer than 50m L100IP motor filters should be installed.
Directions for installing filters can be found in the L100IP installation manual.
•
The carrier frequency setting must be less than 5 kHz to satisfy EMC requirements.
•
Separate the mains circuit wiring from the wiring used for signals or process circuit. Please refer to
the L100IP installation manual.
D) Installation
•
For L100IP series inverters, the filters described hereafter have to be used and the installation notes
have to be observed.
If installed according to the following directions, the frequency inverters comply with the following standards:
Emmissions: EN 61800-3 (EN 55011 group 1, class B)
Immunity: EN 61800-3, industrial environments
For the best possible damping of interference, special line filters have been developed which guarantee
you easy assembly and installation along with the necessary electrical reliability. However, effective
EMC is only ensured if the suitable filter is selected for the particular drive and installed in accordance
with these EMC recommendations. Please order the appropriate filter when ordering L100IP inverter.
Note: All filters are designed for 50Hz/60Hz +/-5%.
The amount of line-conducted interference also increases as motor cable length increases. Adherence to the
interference limits for line-conducted interference is guaranteed on following way:
• If maximum motor cable length is 10 m at maximum elementary frequency:
Class „B".
• If maximum motor cable length is 20 m at elementary frequency 5 kHz:
Class „B".
• If maximum motor cable length is 50 m at maximum elementary frequency:
Class „A".
Observe the following provisions for an electromagnetically compatible setup of your drive system:
1. As user you must ensure that the HF impedance between frequency inverter, filter and ground is as small
as possible.
• See to it that the connections are metallic and have the largest possible areas (zink-plated mounting
plates)
2. Conductor loops act like antennas, especially when they encompass large areas. Consequently:
• Avoid unnecessary conductor loops
2
(0.6 g) at 10–55Hz.
)