EasyManuals Logo

ABB HF Series User Manual

ABB HF Series
63 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #7 background imageLoading...
Page #7 background image
The microcontroller powers the V1 and V2 semiconductors. Currents I1, I2 and I3 flow so that the motor runs, as highlighted
in red in figure 3.
Semiconductors generate significant losses in the form of heat dissipation. In order to reduce this loss of power, V1 and V2
are now bypassed by the K3 relays and hence turned off. The bypass relays now carry the current while the motor is running,
reducing power losses.
The same method is used for switching off the motor: the semiconductors are activated by the microcontroller and take over
the current from the bypass relays that then open. After that, the motor is switched off by de-energizing V1 and V2 so that
the current equals zero. At the end, the K1 and K2 relays are opened.
03 Equivalent circuit diagram 3 04 Equivalent circuit diagram 4
Hybrid technology enables arc-free switching and helps extend the lifespan because the relay switching that would usually
cause arcs is prevented.
The typical wearing away of contact material seen in standard electromechanical devices is eliminated thanks to the smart
use of the semiconductors. Up to 30 million electrical switching lifecycles, 7200 switching cycles per hour and multifunction-
ality is provided in only 22.5 mm width.
M
3 ~
L1 L2 L3
I1
I2
∆∇∆∇
I3
V1 V2
K3 K3 K2
K1 K1 K2
Contact energized
M
3 ~
L1 L2 L3
I1
I2
∆∇∆∇
I3
V1 V2
K3 K2
K1 K1 K2
Contact energized
K3
7 ELECTRONIC COMPACT STARTER | MANUAL

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the ABB HF Series and is the answer not in the manual?

ABB HF Series Specifications

General IconGeneral
BrandABB
ModelHF Series
CategoryController
LanguageEnglish

Related product manuals