12 Installation
Honeywell
3
IT networks (Honeywell EMC class T):
Inverters of this class fulfil the product
standard EN 61800-3 (2004) if intended to be used in IT systems. In IT systems, the
networks are isolated from earth, or connected to earth through high impedance to
achieve a low leakage current. NOTE: if inverters are used with other supplies, no
EMC requirements are complied with. SmartDrive Compact inverters can be easily
modified to the requirements of the T-class. This class is very typical requirement
also in installations in ships.
Environments in product standard EN 61800-3 (2004)
First environment:
Environment that includes domestic premises. It also includes
establishments directly connected without intermediate transformers to a low-voltage
power supply network which supplies buildings used for domestic purposes.
NOTE: houses, apartments, commercial premises or offices in a residential building
are examples of first environment locations.
Second environment:
Environment that includes all establishments other than
those directly connected to a low-voltage power supply network which supplies build-
ings used for domestic purposes.
NOTE: industrial areas, technical areas of any building fed from a dedicated trans-
former are examples of second environment locations.
3.1.4 Changing the EMC protection class
The EMC protection class of SmartDrive Compact inverters can be changed from
class H by
removing the EMC-capacitor disconnecting screw
, see figure below.
Note!
Do not attempt to change the EMC level back to class H. Even if the proce-
dure above is reversed, the inverter will no longer fulfil the EMC requirements of
class H!
