Selecting The Proper Drive Rating - Automation Direct DURApulse GS4 User Manual

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eleCTing The roper
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eTermine aximum
AC drives generate a significant amount of heat and will cause the internal temperature of an
enclosure to exceed the rating of the AC drive, even when the ambient temperature is less than
104°F (40°C). Enclosure ventilation and/or cooling may be required to maintain a maximum
internal temperature of 104°F (40°C) or less. Ambient temperature measurements/calculations
should be made for the maximum expected temperature. When permissible, flange mounting the
AC drive (mounting with the drive heatsink in open ambient air) can greatly reduce heating in the
enclosure.
For use above 104°F (40°C), the AC drive must be derated as described below.
d o C
eraTe uTpuT urrenT
Protection Level
UL Type 1 / IP20 *
UL Open Type
/ IP20 *
* For more information about environmental ratings, refer to the "Operating Temperature and
Protection Level" table on
DuRA
GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
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rive aTing ConTinued
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ased on emperaTure
Drive Derating by Temperature and Protection Level
Derating
When the GS4 drive is operating at rated current, the ambient temperature has to be
between -10°C and +40°C. When ambient temperature exceeds 40°C, decrease the rated
current by 2% for every 1°C temperature increase. Maximum allowable temperature is 60°C.
When the GS4 drive is operating at rated current, the ambient temperature has to be
between -10°C and +50°C. When ambient temperature exceeds 50°C, decrease the rated
current by 2% for every 1°C temperature increase. Maximum allowable temperature is 60°C.
page 1–9 of this chapter.
Derating for
Ambient Temperature
100%
90%
80%
70%
60%
50%
40%
30 35
Ambient Temperature (°C)
Chapter 1: Getting Started
)
emperaTure
a 104°f (40°C)
bove
UL Open-Type / IP20
UL TYPE1 / IP20
UL OPEN TYPE / IP20 side-by-side
40 45 50 55 60
Page 1–5