20
• DOK-POWER*-TVD*1.3****-ANW1-EN-E1,44 • 02.97
3. Electrical Connections
If the modular drives are to be operated in residential or light
industrial areas, then it may be necessary to mount an rf interference
filter to maintain the limit values for the emission of interference (rf
interference suppression).
Each drive module must be connected to the PE-rail of the TVD with a separate
ground lead.
The leakage current via the protective conductor is greater than 3.5
mA AC. A permanent connection is thus required for the TVD.
A transformer is needed if the mains voltage is less than 3 x 380V or greater
than 3 x 480V.
The mains inductance (leakage inductance) from transformers can vary
significantly depending on power and type of construction. Mains connection
components are therefore still needed even if transformers are used (see
section 3.3.).
Fig. 3.6:
Mains connection TVD 1.3 via a transformer
Required transformer power:
S
Tr
=
transformer power in VA
P
DC
=
DC bus continuous power in W
U
N
=
transformer output voltage in V
S
TR
=
P
DC
×
3
×
U
N
25,5
Mains connection via a
transformer
X12
L1
L2
L3
NAM 1.3- . .
PE
X7/1U1
X7/1V1
X7/1W1
TVD 1.3
TVD/NAM12Trafo
U1
V1
W1
U2
V2
W2
L-
L+
2L+
1L+
16-pin bus cable
(NAM blower power source)
IN 175/155
X7/2L+
X7/1L+
N
X8/N
P
X8/P
1)
2)
2)
2
2
2
2
stranded,
max.
2 m lang
PE
1) min. lead cross section .……………………………….....4 mm with TVD 1.3-08
min. lead cross section: .………………………………....16 mm with TVD 1.3-15
2) min. lead cross section: ………………………………....2,5 mm with TVD 1.3-08
min. lead cross section ……………………………….......6 mm with TVD 1.3-15
3)
≥
10 mm
3)
3)
Lead cross section per EN 60204 - installation type B1 - correcting factors not taken into account
2
