3
3-1
CHAPTER 3 WIRING
N
OTES ON
EMC (
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 L2500 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
2
(0.6 g) at 10–55Hz.
•
Location: 1000 meter or less altitude, indoors (no corrosive gas or dust).
B)
The power supply to the L2500 inverter must conform to the conditions stated
below. If one of the conditions mentioned is not satisfied then an appropriate
L2500 AC reactor will have to be installed.
•
Voltage fluct/-10% or less
•
Voltage unb/-3% or less
•
Frequency var/-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, L2500 motor filters should be installed. Directions for installing filters can
be found in the L2500 installation manual.
•
Seperate the mains circuit wiring from the wiring used for signals or process
circuit. Please refer to the L2500 installation manual.
D) Installation
•
For L2500 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.
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 20 m:
Class „B“
•
If maximum motor cable length is 65 m (50 m at 3~400/460V inverters):
Class
„A“