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7.
Preparing the workplace and the saw system
7.1
Please observe the warnings and safety precautions listed in sections 1, 2 and 3.
7.2
Power requirements and cooling water
– Check the electric supply fuse rating (63 amps is best and 32 amps is the minimum) and that the earth/ground
connection is functional (this is the responsibility of the site manager).
– Use an electric extension cable with standard Euro plug as per EN CEE 63. Select the cable cross section
according to the load it is to carry (amps) and the cable length. Please refer to the following table:
Cross sectional area of individual cable cores (F)
Current
Amps (A)
32
40
63
* maximum cable length in metres
CEE 63 plug on the D-LP 30 (LP 20) – pin assignement
LP 30, 400 V, 3 phases + N + PE
N
PE
– The CEE 63 plug, male type, complies with the IEC 309-2 standard.
– Ensure that the water supply has a pressure of 4–6 bar. The normal cooling water flow rate is 10 l/min. For
technical reasons, the flow rate must be at least 5 l/min.
– Make suitable arrangements for water removal, depending on the job and situation, e.g. water barriers, wet-
type vacuum cleaner, cover with plastic sheets etc.
7.3
Clarify the situation and secure the workplace
– Obtain approval from the site engineer or site management before beginning sawing. Find out whether over-
cutting at corners is permitted. If not, the corresponding corner holes must be planned and drilled first.
– Check that the area is cordoned off, that supports are in place and warnings to third parties are displayed.
7.4
Planning the cutting sequence and marking the cuts and fastening points
– The parts to be cut out are usually marked by the client. A rational cutting sequence can be followed when
the rail supports are well positioned.
– If necessary, adjust the maximum size and weight of the concrete blocks to the prevailing conditions by mak-
ing dividing cuts, e.g. in accordance with the work order, the means of handling the blocks, the capacity of
the crane or the maximum floor loading capacity.
7.5
The cutting sequence
1
st
cut
Steel wedges can be used as necessary to secure the cut-out concrete blocks.
Designation: Steel wedge, item no. 41910/1
12
Hydraulic unit F mm
2
2.5
LP30/400V
24
LP30/400V
20
LP30/400V
PE = earth/ground L1 = phase
L3
N = neutral
L2
L1
2
nd
cut
Fmm
2
Fmm
2
F mm
4
6
10
39
59
98
31
47
78
20
30
50
L2 = phase
L3 = phase
3
rd
cut
2
F mm
2
16
F mm
*
125
80
LP 20, 230 V, 3 phases + PE 9 h
L1
L2
L3
4
th
cut
Electric cable
2
PE
5
th
cut
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