VLT
®
2800 Series
■
Safety clamp
If the galvanic isolation (PELV) between
control terminals and high-voltage terminals
is to be maintained, the accompanying
safety clamp must be fitted to VLT 2803-2815,
200-240 V, and VLT 2805-2815, 380-480 V.
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Pre-fuses
For all unit types, external pre-fuses must be fitted in the
mains supply to the frequency converter. For UL/cUL
applications with a mains voltage of 200-240 Volt, use
pre-fuses type Bussmann KTN-R (200-240 Volt) or
Ferraz Shawmut type ATMR (max. 30A). For UL/cUL
applications with a mains voltage of 380-480 Volt, use
pre-fuses type Bussmann KTS-R (380-480 Volt). See
Technical data
for correct dimensioning of pre-fuses.
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Mains connection
Please note that at 1 x 220-240 Volt the neutral wire
must be attached to terminal N
(L2)
and the phase
wire must be connected to terminal L1
(L1)
.
No. N
(L2)
L1
(L1) (L3)
Mains voltage 1 x 220-240 V
N
L1
No.
95
Earth connection
No. N
(L2)
L1
(L1)
(L3)
Mains voltage 3 x 220-240 V
L2
L1
L3
No.
95
Earth connection
No. 91 92
93
Mains voltage 3 x 380-480 V
L1
L2
L3
No. 95
Earth connection
NB!:
Please check that the mains voltage fits the
mains voltage of the frequency converter, which
can be seen from the nameplate.
400-Volt units with RFI-filters may not be
connected to mains supplies in which the
voltage between phase and earth is more
than 300 Volts. Please note that for the IT mains
and the delta earth the mains voltage can exceed
300 Volts between phase and earth. Units with type
code R5 can be connected to mains supplies with
up to 400 V between phase and earth.
See
Technical data
for correct dimensioning of
cable cross-section. See also the section entitled
Galvanic isolation
for further details.
■
Motor connection
Connect the motor to terminals 96, 97, 98.
Connect earth to terminal 99.
No. 96 97 98
Motor voltage 0-100% of
mains voltage.
U
V
W
3 wires of motor
U1
W2
V1
U2
W1
V2
6 wires out of motor, Delta
connected
U1 V1 W1
6 wires out of motor, Star
connected
U2, V2, W2 to be
interconnected separely
(optional terminal block)
No. PE
Earth connection
See
Technical data
for correct dimensioning
of cable cross-section.
All types of three-phase asynchronous standard
motors can be connected to a frequency converter.
Normally, small motors are star-connected (230/400
V,
/ Y). Large motors are delta-connected (400/690
V,
/ Y). The correct connection mode and voltage
can be read from the motor nameplate.
NB!:
In motors without phase insulation paper,
an LC filter should be fitted on the output
of the frequency converter.
MG.28.E9.02 - VLT is a registered Danfoss trademark
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