Safety Earthing; Extra Protection (Rcd); Electrical Installation - Mains Supply; Electrical Installation - Motor Cables - Danfoss VLT 5000 Series Operating Instructions Manual

Electrical installation
The voltage on the frequency converter is
dangerous when the unit is connected to
mains. Incorrect installation of the motor or
the frequency converter may lead to material damage
or serious injury or it may be fatal. Consequently, the
instructions in this manual as well as national and local
rules and safety regulations must be complied with.
Touching the electrical parts may be fatal, even after
the mains supply has been disconnected.
Using VLT 5001-5006, 200-240 V and 380-500
V: wait at least 4 minutes.
Using VLT 5008-5052, 200-240 V: wait
at least 15 minutes.
Using VLT 5008-5062, 380-500 V: wait
at least 15 minutes.
Using VLT 5072-5302, 380-500 V: wait
at least 20 minutes.
Using VLT 5352-5552, 380-500 V: wait
at least 40 minutes.
Using VLT 5001-5005, 525-600 V: wait
at least 4 minutes.
Using VLT 5006-5022, 525-600 V: wait
at least 15 minutes.
Using VLT 5027-5062, 525-600 V: wait
at least 30 minutes.
Using VLT 5042-5352, 525-690 V: wait
at least 20 minutes.
Using VLT 5402-5602, 525-690 V: wait
at least 30 minutes.
NB!:
It is the user's or certified electrician's
responsibility to ensure correct earthing and
protection in accordance with applicable
national and local norms and standards.
High voltage test
A high voltage test can be carried out by short-
circuiting terminals U, V, W, L
energizing by max. 2.15 kV DC for one second
between this short-circuit and the chassis.
NB!:
The RFI switch must be closed (position
ON) when high voltage tests are carried
out (see section RFI Switch).
The mains and motor connection must be interrupted
in the case of high voltage tests of the total installation
if the leakage currents are too high.
MG.51.A9.02 - VLT is a registered Danfoss trademark
, L and L and
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®
VLT 5000 Series

Safety earthing

NB!:
The frequency converter has a high leakage
current and must be earthed appropriately
for safety reasons. Use earth terminal
(see section Electrical installation, power cables),
which enables reinforced earthing.
Apply national safety regulations.

Extra protection (RCD)

ELCB relays, multiple protective earthing or earthing
can be used as extra protection, provided that local
safety regulations are complied with.
In the case of an earth fault, a DC content may
develop in the faulty current.
If ELCB relays are used, local regulations must be
observed. Relays must be suitable for protection
of 3-phase equipment with a bridge rectifier and
for a brief discharge on power-up.
See also the section Special Conditions in
the Design Guide.

Electrical installation - mains supply

Connect the three mains phases to terminals L

Electrical installation - motor cables

NB!:
If an unscreened cable is used, some
EMC requirements are not complied with,
see the Design Guide.
If the EMC specifications regarding emission are
to be complied with, the motor cable must be
screened, unless otherwise stated for the RFI filter
in question. It is important to keep the motor cable
as short as possible so as to reduce the noise level
and leakage currents to a minimum.
The motor cable screen must be connected to the
metal cabinet of the frequency converter and to the
metal cabinet of the motor. The screen connections
are to be made with the biggest possible surface
(cable clamp). This is enabled by different installation
devices in the different frequency converters.
, L , L .
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