Block Diagram Of The Frequency Converter; Enclosure Types And Power Ratings; Approvals And Certifications; Disposal Instruction - Danfoss VLT FC 102 Operating Instructions Manual

Introduction
1 1
1.5 Block Diagram of the Frequency
Converter
Illustration 1.1 is a block diagram of the frequency
converter's internal components. See Table 1.2 for their
functions.
Illustration 1.1 Frequency Converter Block Diagram
Area
1 Mains input
2 Rectifier
3 DC bus
4 DC reactors
5 Capacitor bank
6 Inverter
7 Output to motor
4
VLT
Title Functions
•
3-phase AC mains power
supply to the frequency
converter
•
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
®
HVAC Drive Operating Instructions
Area
8 Control circuitry
Table 1.2 Legend to Illustration 1.1

1.6 Enclosure Types and Power Ratings

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

1.7 Approvals and Certifications

Table 1.3 Approvals and Certifications
More approvals and certifications are available. Contact
local Danfoss partner. The T7 (525-690 V) frequency
converters are not certified for UL.
The frequency converter complies with UL508C thermal
memory retention requirements. For more information
refer to the section Motor Thermal Protection in the Design
Guide.
For compliance with the European Agreement concerning
International Carriage of Dangerous Goods by Inland
Waterways (ADN), refer to ADN-compliant Installation in the
Design Guide.

1.8 Disposal Instruction

Table 1.4 Disposal Instruction
MG11AJ02 - Rev. 2013-07-31
Title 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
Do not dispose of equipment containing
electrical components together with
domestic waste.
Collect it separately in accordance with
local and currently valid legislation.