SINUS/ISD
15P0082B8
USER MANUAL
3 - 1/14
3.0
I
NSTALLING THE
I
NVERTER
IMPORTANT:
Read Chapter 12: “Certification for the Inverter” before installing this unit.
3.1
3.1
REQUIREMENTS FOR EMC COMPLIANCE
REQUIREMENTS FOR EMC COMPLIANCE
All Variable Speed Drives (VSDs) potentially produce electrical emissions which are radiated into the
environment and conducted back into the ac supply. VSDs are inherently immune to any additional external
electrical noise. The following information is provided to maximise the Electro Magnetic Compatibility (EMC) of
VSDs and systems in their intended operating environment, by minimising their emissions and maximising their
immunity.
3.1.1
MINIMISING RADIATED EMISSIONS
EN55011 radiated emission measurements are made between 30MHz and 1GHz in the far field at a distance of
10 to 30 metres. Limits lower than 30MHz or in close proximity are not specified. Emissions from individual
components tend to be additive.
•
Use a screened/armoured cable between VSD/cubicle and motor containing the motor protective earth (PE)
connection. It should have a 360°° screen termination. Earth screen at both ends connecting to the motor
frame and cubicle. Maintain the screen integrity using 360° terminations.
Note:
Some hazardous area installations may preclude direct earthing at both ends of the screen, in this case
earth one end via a 1
µ
F 50Vac capacitor, and the other as normal.
•
Keep unshielded cable as short as possible inside the cubicle.
•
Always maintain the integrity of the shield.
•
If the cable is interrupted to insert contactors etc., re-connect the screen using the shortest possible route.
•
Keep the length of screen stripped-back as short as possible when making screen connections.
•
Ideally use 360
°
screen terminations using cable glands or `U’ clips on power screen rails.
If a shielded cable is not available, lay unshielded motor cables in a metal conduit which will act as a shield. The
conduit must be continuous with a direct electrical contact to the VSD and motor housing. If links are necessary,
use braid with a minimum cross sectional area of 10mm
2
.
Note:
Some motor gland boxes and conduit glands are made of plastic, if this is the case, then braid must be
connected between the screen and the chassis. In addition at the motor end, ensure that the screen is
electrically connected to the motor frame since some terminal boxes are insulated from the frame by
gasket/paint.
3.1.2
EARTHING REQUIREMENTS
IMPORTANT:
Protective earthing always takes precedence over EMC earthing.
3.1.2.1
Protective Earth (PE) Connections
Note:
In accordance with the installation requirements of EN60204, only one protective earth conductor is
permitted at each protective earth terminal contacting point.
Local wiring regulations may require the protective earth connection of the motor to be connected locally, i.e. not
as specified in these instructions. This will not cause shielding problems because of the relatively high RF
impedance of the local earth connection.
3.1.2.2
EMC Earth Connections
For compliance with EMC requirements, we recommend that the “0V/signal ground” is separately earthed. When
a number of units are used in a system, these terminals should be connected together at a single, local earthing
point.
Summary of Contents for SINUS/ISD 200 S-0.75
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