Low-Voltage Variable Frequency Drives
Field definitions accept correct values; VFD installation altitude is now the altitude project parameter
Showing changes from Rev 3
to Rev 4
in Low-Voltage Variable Frequency Drives.
---
title: Low-Voltage Variable Frequency Drives
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### 40°C is the standard rating reference for enclosed drives and is the datasheet default; it is a rating basis rather than a measured room temperature, and it is raised only where the installed location is known to run hotter. {note}
−### The drive shall be derated or otherwise compensated for the installation altitude indicated in the datasheet so that it delivers full motor full-load current at the site elevation.
+### The drive shall be derated or otherwise compensated for [[parameter: altitude]] in accordance with the manufacturer's published correction factors, so that it delivers full motor full-load current at the site elevation.
−```datasheet
−label: Installation altitude
−type: range
−unit: ft
−options:
− min: 0
− max: 12000
− step: 100
− setpoints: [3300, 6600, 10000, 12000]
−```
−
−### Site elevation is a project fact rather than a specification choice, and a wrong assumed elevation silently undersizes the drive, so the field carries no default. {note}
−
# Input Power and Protection {toc}
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- Input fuses (each rating)
```