ELTEX ES53 Series, Operating Instructions Manual

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BA-en-2018-2006_ES53
3.5 Maximum active bar length and length of the high voltage cable
Both the lengths of the high voltage cable and the active bars are limited.
The shielded high voltage cables cause a capacitive load on the trans-
former inside the power supply. The maximum loading capacity is a result
of the function of the total active bar length and the total length of all high
voltage cables. Fig. 4 demonstrates this principle for EXR50 bars.
Example: The maximum permissible total cable length with a 3 meter
active bar length is 32 meters.
3.6 Connecting supply voltage
Depending on the design of the power supply, connect the supply voltage
via the power supply lead (1, Fig. 1) using an earthing pin plug (depending
on country); overvoltage category II.
Caution!

An overcurrent protection device with a nominal current rating

16 A and
breaking capacity

4 kA must be installed in the mains power supply cir-
cuit. To ensure that no voltage is supplied to the bars when the material
web is at rest, enabling the supply voltage to the power supply via
machine contact is recommended. If the material web is at rest, or if the
machine is not in operation, no high voltage is supplied to the bars in this
case.
For external security of the power supply the following circuit breaker is
recommended: Tripping Characteristic 2A / K according to DIN VDE 0660
Part 101, DIN EN 60947-2 and IEC 947-2.
Fig. 4:

Loading capacity
of the power sup-
ply as factor of bar
length and length
of high voltage
cable.
Z00
0
41
e
Σ
lengths of h.v. cable [m]
Σ
lengths of active bars [m]
15
10
5
10 20 30 40 50
permissible
range