CG emotron TSA Series, Instruction Manual

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CG Drives & Automation 01-5980-01r2 Application guidelines 31
4. Application guidelines
This chapter is a guide to selecting the correct softstarter
rating and softstarter functionality for different applications.
To make the right choice the following tools are used:
The AC-53 norms
The AC-53 norms are defined in the EN(IEC) 60947-4-
2:2007 standard for electronic softstarters. The purpose of
these norms is to aid in selecting a softstarter with regards to
duty cycle, starts per hour and maximum starting current.
The Applications Rating List
With this list the Emotron TSA softstarter rating type can be
selected depending on the type of application uses, see Table
14, page 32.
The Applications Function List
This table gives an overview of the most common
applications and their challenges. For each application
Emotron TSA softstarter settings are proposed, with
references to the menus used. See Table 15, page 34.
4.1 Softstarter dimensioning
according to AC-53b
The EN(IEC) 60947-4-2:2007 standard defines AC-53b as
a norm for dimensioning of softstarters for continuous
running with a bypass contactor. This is the norm for which
the Emotron TSA is designed.
AC-53b rating example
Explanation of the rating designation (see also Fig. 26):
1. Rated current (FLC) of softstarter, [Ampere]
2. Classification (AC-53b for all Emotron TSA models)
3. Start current expressed as a multiple of FLC
4. Start time, [seconds]
5. Bypass time, [seconds]
The example concerns Emotron TSA model 52-070, used
for a pump application. The rating designation indicates a
current rating of 70 A with a start current ratio of 3.0 x FLC
(210 A) for 30 seconds, and with a 330 seconds (5.5
minutes) interval between starts (current via bypass
contactors).
Fig. 26 Duty cycle.
4.2 Applications rating
According to the AC-53b norm a softstarter can have several
current ratings. The Applications Rating List in Table 14,
page 32 shows which rating that is recommended for the
application.
The Emotron TSA model is selected depending on its model
size and on the duty cycle of the application:
AC-53b ratings for Emotron TSA size 1:
• AC-53b 3.0-15:345 (normal duty with bypass)
• AC-53b 5.0-15:345 (heavy duty with bypass)
AC-53b ratings for Emotron TSA size 2 - 6:
• AC-53b 3.0-30:330 (normal duty with bypass)
• AC-53b 5.0-30:330 (heavy duty with bypass)
Example:
In the previous example, in which the Emotron TSA 52-070
is used for a pump application, the recommended rating is
“normal duty” according to the Applications Rating List.
70 A: AC-53b 3.0 - 30 : 330
    
NOTE: To select softstarter size it is important to ensure
that not only FLC (Full Load Current) is checked but also
the starting requirements.
Start Bypass
Time
Start current
Current
operation