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Requirements for Installati...
4.2 Electrical Installation
4.2.1 Terminals - Short Overview
®
The VLT
Advanced Harmonic Filter AHF 005/AHF 010 contains the following terminals:
•
X1.1–X1.3 are the mains terminals.
•
X2.1–X2.3 are the output terminals to the frequency converter.
•
X3.1–X4.3 are optional connection terminals for capacitor disconnect.
•
A and B are the temperature switch connected to the frequency converter.
•
PE for protective earth.
24V DC
24 - 240V AC
depending on
contactor type
Illustration 4.8 Connection Diagram
4.2.1.1 Terminals for Capacitor Disconnect
From the factory, the terminals for the capacitor disconnect
are bypassed or looped with jumpers. When using an
external contactor, remove the jumper and use a relay.
Refer to chapter 5.2.1 Capacitor Disconnect Contactors,
chapter 5.3.1.2 IP21/NEMA 1 Upgrade Kit with Built-in
Capacitor Disconnect Circuitry, and Illustration 5.2 for more
details.
NOTICE
A Danfoss frequency converter can be used for
controlling the relay of an external contactor. See
chapter 6 Programming for more information.
NOTICE
The capacitor disconnect feature does not apply to VLT
AutomationDrive FC 301.
®
The power factor of the VLT
AHF 005/AHF 010 decreases with decreasing load. At no
MG80C602
Design Guide
A
B
X1.1
X2.1
X1.2
X2.2
AHF
X1.3
X2.3
PE
PE
X3.1 X3.2 X3.3 X4.1 X4.2 X4.3
Capacitor
disconnect
(optional)
®
Advanced Harmonic Filter
Danfoss A/S © 05/2019 All rights reserved.
12
27
(24 V)
(coast inverse)
91 (L1
96 (U)
VLT
92 (L2)
97 (V)
Frequency
converter
93 (L3)
98 (W)
95 (PE)
99 (PE)
Relay
01
02
load, the power factor is 0, and the capacitors produce
leading current of approximately 25% of the rated filter
current. In applications where this reactive current is not
acceptable, disconnect the capacitor bank via terminals
X3.1, X3.2, X3.3, and X4.1, X4, X4.3.
Per default (on delivery) the wiring shortens terminal X3.1
with X4.1, X3.2 with X4.2, and X3.3 with X.4.3. If no
capacitor disconnect is required, do not change these
shortened terminals.
If a disconnection of the capacitors is required, place a 3-
phase contactor between terminals X3 and X4. Using AC3
contactors is recommended, see chapter 5.2.1 Capacitor
Disconnect Contactors. An IP21/NEMA 1 upgrade kit with
built-in capacitor disconnect circuitry is available as an
option, see chapter 5.3.1 IP21/NEMA 1 Upgrade Kit.
Paralleling AHF
It is possible to run 2 filters in parallel and still use both
the capacitor disconnect and the temperature switch. Wire
according to Illustration 4.9.
4
4
23
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