VLT
®
6000 HVAC
MG.60.B1.02 - VLT is a registered Danfoss trademark
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Specification text
The following is a proposal for a HVAC frequency
converter specification text that can be supplied with
tender material.
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Part 1 General
1.01
Section Includes
A. This section covers the requirements necessary to
furnish and install frequency converters.
1.02
Related Work
A. This section shall be used in conjunction with the
following other specifications and related Contract
Documents to establish the total requirements for
frequency converters:
1) Section 16000 - Basic Electrical
Requirements
B. In the event of conflicts regarding frequency
converter requirements between this section and
any other section, the provision of this section
shall govern.
1.03
References
Each frequency converter shall be designed and
manufactured in accordance with the current edition
of the following European and international standards
and directives:
A. EN 55011 - Limits and methods of measurement
of radio disturbance characteristics (EMC
Emmision)
B. EN 50178 - Electronic equipment for use in Power
Installations
C. EN 61800-3 - Adjustable speed electrical power
drive systems - Part 3: EMC product standard
D. EN 61000-3-2 - Limits for harmonic current
emissions (equipment input current below 16 A
per phase)
E. prEN 61000-3-4 - Limits for harmonic current
emissions (equipment input current above 16 A
per phase)
F. ENV 50140 - EMC/Radiated radio frequency
electrical field (simulation of impact from GSM
telephones)
G. EMC Directive 89/336/EEC
H. Low Voltage Directive 73/23/EEC
I.
EN 50082-2 - Generic Immunity, Industry
J. EN/IEC 61000-4-2 - ElectroStatic Discharge (EMC
Immunity)
K. EN/IEC 61000-4-3 - Radiated electromagnetic
field (EMC Immunity)
L. EN/IEC 61000-4-4 - Burst (EMC Immunity)
M. EN/IEC 61000-4-5 - Surge (EMC Immunity)
N. EN/IEC 61000-4-6 - Cable born HF (EMC
Immunity)
O. VDE 0160 class W2 test pulse - Mains transients
(EMC Immunity)
P. UK Electricity Council Recommendation G5/3
Stage 2 (EMC Emission)
Q. IEEE 519: 1992 - Harmonic Control in Electrical
Power Systems
R. UL 508
S. US National Electric Code (NEC)
T. Canadian Underwriters Laboratory (C-UL).
1.04
Design Criteria
A. The frequency converter shall be designed for
HVAC applications.
B. The frequency converter shall be of the pulse
width modulated voltage vector control type.
C. The frequency converter shall be able to operate
any asynchronous AC motor with a variable
torque load.
1.05
Regulatory Requirements
A. The frequency converters must be CE marked in
accordance with the EMC Directive 89/336/EEC
and the Low Voltage Directive 73/23/EEC.
B. A Manufacturers Declaration must be issued in
accordance with the Machine Directive 89/392/
EEC.
C. Conducted Radio Frequency Interference (RFI)
shall be in accordance with EN 55011 Group 1
Class B with built-in RFI filters.
D. The Total Harmonic Voltage Distortion in the
electrical power system shall not exceed 5% at the
Point of Common Coupling (transformer
secondary side).
E. The frequency converter immunity shall be in
accordance with EN 50082-2.
F. The manufacturer shall be certified in accordance
with ISO 14001: 1996 Environmental
Management Systems.