NORD Drivesystems BU0300 - Manual (Page 11)

1 General information
BU 0300 EN Subject to technical alterations 11
1.7 Design with protection class IP55 / IP66
The frequency inverter NORDAC trio SK 300E can be ordered in any size and therefore any power stage with
the protection classes IP55 (Standard) or IP66 (Option).
The protection class IP66 must always be included in the order when ordering!
There are no restrictions in both protection classes regarding the function of the available adapter units,
technology units or customer units (see the applicable chapters). The type designation of the SK 300E and the
modules in the protection class IP66 is given an additional code "-C" (coated → coated board) to differentiate
the IP55 and IP66 protection classes.
IP55 design:
The IP55 design of the SK 300E is generally available as the standard design. Both variants (motor-
integrated, close to motor) are available here. In addition, all adapter units, technology units and customer
units are available for this design.
IP66 design:
The IP66 design is a modified option compared to the IP55 design. Both variants (motor-integrated, close to
motor) are also available here. The modules available to the IP66 design (adapter units, technology units and
customer units) have the same functionalities as the corresponding IP55 design modules.
Note
The modules for the IP66 design are identified by an additional "-C" and are modified according to the
following special measures!
Special measures:
• Coated circuit boards
• Low pressure tests
Æ A free M12 screwed connection is required for low pressure testing. Following successful
testing, a membrane valve is inserted here. These screw connections are therefore not
available to the customer.
• Membrane valve for pressure compensation during temperature changes
Note
It must be ensured in the IP66 design that the cable lines and cable connections are carefully
matched so that no leaks occur in the SK 300E or any other problems occur that could affect the
maintenance of the IP66 protection class!