6.2 Electrical Installation
6.2.1 Over Temperature Protection
The Danfoss harmonic filters AHF005 and AHF010 are all equipped with a galvanic isolated switch (PELV) that is closed under
normal operating conditions and open if the filter is overheated.
NOTE
The over temperature protection must be used to prevent damage of the filter caused by over temperature. An immediate stop
or a controlled ramp down within max. 30 sec. has to be performed to prevent filter damage.
There are many ways the switch can be used and one example is to connect terminal A of the harmonic filter to terminal 12 or
13 (voltage supply digital input, 24V) of the Danfoss frequency converter and terminal B to terminal 27. Program digital input
terminal 27 to
Coast Inverse
. The frequency converter will coast the motor and thereby unload the filter if an over temperature is
detected. Alternatively use terminal 12/33 and set
1-90 Motor Thermal Protection
.
X3.1 X3.2 X3.3 X4.1 X4.2 X4.3
X1.1
X1.2
X1.3
X2.1
X2.2
X2.3
A
B
91 (L1
96 (U)
97 (V)
98 (W)
92 (L2)
93 (L3)
95 (PE)
PE
01 02
Relay
24V DC
24 - 240V AC
depending on
contactor type
Capacitor
disconnect
(optional)
12
(24 V)
27
(coast inverse)
99 (PE)
AHF
VLT
Frequency
converter
Main
s
su
ppl
y
Motor
PE
130BB904.10
Illustration 6.1 Connection Diagram
NOTE
The maximum rating of the over temperature contactor is 250V AC and 10A.
How to Install
AHF005/010 Design Guide
32
MG.80.C4.02 - VLT
®
is a registered Danfoss trademark
6
6
Содержание VLT AHF005
Страница 1: ...MAKING MODERN LIVING POSSIBLE Design Guide AHF005 010 ...
Страница 43: ......
Страница 44: ......
Страница 59: ...www danfoss com drives MG80C402 130R0436 MG80C402 Rev 2010 12 20 ...