Safety
Information
Product
Information
Mechanical
Installation
Electrical
Installation
Getting
Started
Basic
parameters
Running
the motor
Optimization
SMARTCARD
operation
PC tools
Advanced
parameters
Technical
Data
Diagnostics
UL Listing
Information
10
Affinity User Guide
www.controltechniques.com Issue Number: 5
2.2 Drive types
There are three versions of Affinity drive available:
•
Standard
•
IP54 (NEMA12)
•
IP66 (NEMA12)
The IP54 and IP66 drives are identified by additional characters at the end of the model number, i.e. E12/E54 or E12/E66. The standard drive has no
additional characters.
The standard drives are rated to IP20/NEMA1. Drive sizes 1 and 3 conform to UL Type 1 and sizes 4 to 6 are Open Class. If the optional conduit box
(refer to section 3.5
on page 31) is installed, then drive sizes 4 to 6 conform to UL Type 1.
The E12/E54 and E12/E66 drives have an additional cover installed. They are rated to IP54/NEMA12 and IP66/NEMA12 respectively and both
conform to UL Type 12. E12/E54 and E12/E66 drive sizes 1 to 3 have an internal fan installed to re-circulate the air. The larger drive sizes have fans
installed to the cover to provide forced ventilation using filtered air.
2.3 Ratings
Self ventilated (TENV/TEFC) induction motors require increased protection against overload due to the reduced cooling effect of the fan at low speed.
To provide the correct level of protection the I
2
t software operates at a level which is speed dependent. This is illustrated in the graph below.
The protection starts when the motor speed is below 50% of base speed.
NOTE
Operation of motor I
2
t protection (It.AC trip)
Motor I
2
t protection is fixed as shown below and is compatible with:
•
Self ventilated (TENV/TEFC) induction motors
Motor total
current (Pr 4.01)
as a percentage
of motor rated
current
Motor speed as a
percentage of base speed
100%
Max. permissible
continuous
current
100%
I t protection operates in this region
2
70%
50%
15%
Summary of Contents for Affinity
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