Technical data

17
• DOK-DIAX02-DDC01******-PRJ1-EN-E1,44 • 01.97
3. Electrical Connections - Installation Guidelines
3.4. Power Connection cross sections and Fuses
The power connections of the DDC 1.2 can be protected with either power
circuit breakers or slow-blo gL-type fuses.
The recommended fuse on the input side of the matching tansformer with 3 x
AC 400 V mains.
A power circuit breaker or slow-blow fuse is generally used on the input side
of a matching transformer. The use of power circuits has the advantage that
it is not possible to operate with two phases when one fuse is blowed out.
The recommended fuses and line cross sections apply if INDRAMAT
transformers are used. Make sure that the secondary lines are protected
against short circuiting, in particular, if an isolation transformer with low-power
is used.
Transf.
Rec. power circ.
Tuning Tuning
Rec. slow-blow
power in
Current in A breaker
1)
range value
fuse
kVA
(motor circ. break.)
in A in A
gL class
primary second. type Siemens
2.0 2.9 5 3VU1300-.MK00 4 ... 6 4 6A slow-blow
2.5 3.6 6.3 3VU1300-.ML00 6 ... 10 6 10A slow-blow
3.5 5.1 8.8 3VU1300-.MM00 10 ... 16 10 16A slow-blow
4.0 5.8 10 3VU1300-.MM00 10 ... 16 10 16A slow-blow
5.0 7.2 12.6 3VU1300-.MN00 14 ... 20 14 20A slow-blow
7.5 10.8 18.8 3VU1300-.MP00 18 ... 25 18 20A slow-blow
10 14.5 25.1 3VU1300-.MP00 18 ... 25 18 20A slow-blow
12.5 18.1 31.4 3VU1600-.MP00 22 ... 32 27 25A slow-blow
15 21.7 37.7 3VU1600-.MQ00 28 ... 40 32 25A slow-blow
18 26.0 45.2 3VU1600-.MQ00 28 ... 40 39 35A slow-blow
20 28.9 50.3 3VU1600-.MQ00 28 ... 40 40 35A slow-blow
25 36.1 62.8 3VU1600-.MR00 36 ... 50 50 50A slow-blow
Direct connection to 3
x AC 220 V mains
Fuses on the secondary side of the matching transformer or if connected to 3x
AC 220V mains.
If fuses are to be placed on the secondary side of the matching transformer or
if the DDC is connected to 3 x 220 V mains, then select the fusing as per the
current in the connecting cable, but not less than 16A (16 A slow-blow fuse or
power circuit breaker 3VU1300-.MM00 ).
1) Note the maximum size of the power circuit breaker as indicated by the
manufacturer !
Fusing for three-phase
connections