Danfoss vlt aqua Instruction

3 Introduction to the Low Harmonic Drive
3.1.1 Working Principle
The VLT Low Harmonic Drive is a VLT High Power adjustable frequency drive with an integrated active filter. An active filter is a device that actively
monitors harmonic distortion levels and injects compensative harmonic current onto the line to cancel out the harmonics.
Figure 3.1: Basic layout for the Low Harmonic Drive
VLT AQUA Low Harmonic Drive Instruction
Manual
3 Introduction to the Low Harmonic Drive
MG.20.T1.22 - VLT
®
is a registered Danfoss trademark 3-1
3

Danfoss vlt aqua Specifications

General

Supply Voltage	200-240V, 380-500V, 525-600V
Enclosure	IP20
Features	Energy optimization
Approvals	CE, UL, cUL
Input Voltage Range	200-240V, 380-500V, 525-600V
Output Voltage Range	0 to supply voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Short circuit, Ground fault
Communication Interfaces	PROFIBUS
Cooling Method	Air-cooled