Enclosure Types And Power Ratings; Approvals And Certifications; Disposal Instruction - Danfoss VLT AutomationDrive FC 301 Instruction Manual

Introduction
1.4.3 Block Diagram of the Adjustable
Frequency Drive
Figure 1.3 is a block diagram of the adjustable frequency
drive's internal components. See Table 1.4 for their
functions.
Figure 1.3 Adjustable Frequency Drive Block Diagram
Area Title
•
1 Line power input
•
2 Rectifier
•
3 DC bus
•
•
•
4 DC reactors
•
•
•
•
5 Capacitor bank
•
6 Inverter
•
7 Output to motor
MG33AN22
Instruction Manual
Functions
3-phase AC line power supply
to the adjustable frequency
drive
The rectifier bridge converts
the AC input to DC current to
supply inverter power
Intermediate DC bus circuit
handles the DC current
Filter the intermediate DC
circuit voltage
Prove line transient protection
Reduce RMS current
Raise the power factor
reflected back to the line
Reduce harmonics on the AC
input
Stores the DC power
Provides ride-through
protection for short power
losses
Converts the DC into a
controlled PWM AC waveform
for a controlled variable
output to the motor
Regulated 3-phase output
power to the motor
Danfoss A/S © Rev. 2014-02-10 All rights reserved.
Area Title
•
8 Control circuitry
•
•
Table 1.4 Legend to Figure 1.3

1.5 Enclosure Types and Power Ratings

For enclosure types and power ratings of the adjustable
frequency drives, refer to chapter 8.9 Power Ratings, Weight
and Dimensions.

1.6 Approvals and Certifications

Table 1.5 Approvals and Certifications
More approvals and certifications are available. Contact
local Danfoss partner. The T7 (525–690 V) adjustable
frequency drives are not certified for UL.
The adjustable frequency drive complies with UL508C
thermal memory retention requirements. For more
information, refer to the section Motor Thermal Protection
in the Design Guide.

1.7 Disposal Instruction

Do not dispose of equipment containing
electrical components together with
domestic waste.
Collect it separately in accordance with
local and currently valid legislation.
Table 1.6 Disposal Instruction
Functions
Input power, internal
processing, output, and motor
current are monitored to
provide efficient operation
and control
User interface and external
commands are monitored and
performed
Status output and control can
be provided
7
1 1