Design Guide | APP and iSave overload protection
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180R9357 | AQ265943679828en-00100
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IOM iSave 50 - 70 | 0
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.202
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Table of Contents
Table of Contents
1.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
2.
APP pump and iSave overload protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
2.1
Maximum torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
3.
Standard preferred settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
3.1
VLT FC 202 and VLT FC 302. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
4.
Examples of VLT overload limit settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
5.
APP and iSave maximum load and speed limit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
5.1
APP pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
5.2
iSave energy recovery device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
5.3
Time delay before start. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
1.
Introduction
This document shows what to consider when
programming a VFD that can protect the APP
pump and the iSave against overloads. It also
shows how to program the Danfoss VLT FC 202
and FC 302 in connection with the APP pump
and iSave.
Similar functions need to be available on other
VFD brands.
There are principal two choiches that can be
made when selecting the torque limits for the
pump and iSave.
1.
Protecting the pump or iSave against
maximum allowable load, means maximum
torque at maximum pressure. This choice
may not give the possibility to detect ad-
ditional critical torque caused by wear of
internal parts. See graph in example #1 in
chapter 2.1.
2. Protecting the pump or iSave against sig-
nificant change in actual load. This choice
gives you the possibility to detect addition-
al critical torque caused by wear of internal
parts. This means the torque limit typical
will b set lower than maximum Allowable
Operating Torque. See graph in example #2
in chapter 2.1.
Danfoss strongly recommend to use the
possibility to detect significant change
in actual load.
Summary of Contents for iSave 50
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