Danfoss VLT series Installation Guide

NOTICE
INSTALLATION AT HIGH ALTITUDE
There is a risk for overvoltage. Isolation between
components and critical parts could be insucient, and
may not comply with PELV requirements. Reduce the risk
for overvoltage by using external protective devices or
galvanic isolation.
For installations above 1000 m (3281 ft) altitude, contact
Danfoss regarding PELV compliance.
NOTICE
PELV COMPLIANCE
Prevent electric shock by using protective extra low
voltage (PELV) electrical supply and complying with local
and national PELV regulations.
4.3 Grounding
WARNING
LEAKAGE CURRENT HAZARD!
Leakage currents exceed 3.5 mA. Failure to ground the
frequency converter properly could result in death or
serious injury.
•
Ensure the correct grounding of the equipment
by a certied electrical installer.
For electrical safety
•
Ground the frequency converter in accordance
with applicable standards and directives.
•
Use a dedicated ground wire for input power,
motor power, and control wiring.
•
Do not ground one frequency converter to
another in a daisy chain fashion.
•
Keep the ground wire connections as short as
possible.
•
Follow motor manufacturer wiring requirements.
•
Minimum cable cross-section: 10 mm
2
.
•
Terminate 2 rated ground wires separately, if
applicable in accordance with national and local
codes.
For EMC-compliant installation
•
Establish electrical contact between the cable
screen and the frequency converter enclosure by
using metal cable glands or by using the clamps
provided on the equipment. See Illustration 4.1.
•
Reduce burst transient by using high-strand wire.
•
Do not use pigtails.
•
Use serrated washers or split washers with
enclosure assembly screws. Anodized aluminum
enclosures provide inadequate ground bonding
when plain washers are used.
•
To obtain a low impedance contact, scrape
painted surfaces down to the bare metal.
NOTICE
POTENTIAL EQUALISATION
Risk of burst transient, when the ground potential
between the frequency converter and the control system
is dierent. Install equalizing cables between the system
components. Recommended cable cross-section: 16 mm
2
(4 AWG) or larger.
Electrical Installation
VLT
®
Plus Panel
26 Danfoss A/S © 09/2015 All rights reserved. MG13B102
44

Danfoss VLT series Specifications

General

Series	VLT
Category	DC Drives
Output Voltage	0-100% of input voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Overtemperature, Short Circuit, Ground Fault
Communication Interfaces	Profibus, CANopen
Enclosure Rating	IP20, IP21, IP55, IP66
Cooling Method	Forced Air Cooling, Convection Cooling
Control Mode	Sensorless Vector, Closed Loop Vector
Ambient Temperature	-10°C to +50°C (14°F to 122°F)