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Weidmuller PU-Overvoltage in Mains Control User Manual

Page 2

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The cross-section of the arrester earth conductor is determined, as with the main equipotential bonding
conductors, according to table 1. The conductor must have 0,5 times the cross-section of the main
protective conductor, the upper limit is fixed at 25 mm2 Cu. A lower limit of 10 mm2 Cu is required.

Cross section mm

2

Main protective conductor

- from the power source or
- house service box or main distribution board
outgoing protective conductor.


≤ 16


25


≤ 35

Supply conductor

≤ 35 50

≥ 70

Earth conductor of arrester

10

16

25

Table 1



3. Functional check
PU overvoltage arresters must be subjected to a visual inspection, especially during thunderstorms. If
the colour of the inspection window turns red, the arrester must be replaced by trained service personal.

3.1 Maintenance
If the charge eliminator shows a red window as in 3., it must be replaced with a new one by trained
service personal. The individual charge eliminators are pluggable and encoded according to their
voltage. The varistor arrester must be removed when measuring the insulation resistance according to
DIN VDE 0100 part 610. To remove, pull on the upper parts of the varistor.
The charge eliminator compatible with the rated voltage of the plant must be re-installed.


Technical Data:

PU xC PU xC PU xC PU xC

PU xC

PU 3+1 C PU 3+1 C


Max. Voltage V~

U

c

280

385

75

130 550

280 385


Rated diversion current

i

sn

20 kA 20 kA

15 kA 20 kA 20 kA

20 kA 20 kA

of top part
Max. test current per Unit

1-way block

i

smax

40 kA 40 kA

15 kA 40 kA 40 kA

40 kA 40 kA

2-way block

i

smax

70 kA 70 kA

40 kA 70 kA 70 kA

3-way block

i

smax

100 kA 100 kA 100 kA 100 kA 100 kA

4-way block

i

smax

100 kA 100 kA 100 kA 100 kA 100 kA

100 kA 100 kA


Operating temperature range.

- 40 °C to + 80

°

C

Conductor size

16- 25 mm

2

(stranded wire) 6- 10 mm

2

(solid wire)

10 - 25 mm

2

(flexible

)

Assembly

Snap-on mounting on 35 mm top-hat rails

according to DIN 43 880 A1. draft 6.81

Colour.

Light grey, RAL 7035

orange orange

Material. Polyamide

6.6

Protection IEC 529 :

IP 20

Dimensions

1-way block complete

width 18 mm

2-way block complete

width 36 mm

3-way block complete

width 54 mm

4-way block complete.

width 72 mm

Depth. 55.0

mm

• For DC-Applications please contact the manufacturer.


4. Connection of remote signalling unit