Instruction
Manual
SSG
page
22
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5.1. Operation of the unit
1.
After removing the safety cutting unit out of the carrying case the unit must be checked
for possible damages.
2.
Roll out the insulated hose (Pos.-No. 9) completely. This distance serves for your safety
in case the cable should be live. Please take into consideration that the hose will get
shorter when under pressure. It must be guaranteed that the position of the cutting head
will not change during the cutting cycle.
Attention
When paying out the insulated hose please make sure that you can see the
section of the cable where the cable is cut.
This means provides that no trespassers stay in the danger zone. In addition and prior
starting the cutting procedure the cutting zone must be cordoned off in a 10 m radius.
In case the insulated hose can not be payed out due to a lack of space other suitable
means protection must be provided such as earth walls or ditches.
On the pump as well as on the cutting head (acc. to EN 50340) there are fastening
points (bolts with wing nuts) for the cable providing equipotential bonding.
Attention
Do not ground the cutting head in Germany.
(see BGI 845 (ZH 1/437))
In some European countries the cutting head must be grounded due to possibly cutting
one phase cables causing a one phase short circuit.
3.
Plug the connecting devices (Pos.-No. 3) between pump and hose properly until they
engage safely and can not be disengaged by pulling.
4.
Position the cutting head (Pos.-No. 11) to the cable in an angle of 90°. The cutting head
must be positioned in a way that the cable is situated in the open cutting head
respectively between the blades (Pos.-No. 12).
Attention
One core cables should be consolidated and cut as a three core cable up to
60kV maximum.
Attention
Prior operation the oil level must be checked and if necessary adjusted.
5.
Now the pump respectively cutting cycle can be
started. The cutting cycle is terminated
when the max. operating pressure is reached and the relief valve responded. The
pressure pick up can be monitored with the pressure gauge over the entire cutting cycle.
Attention
The cutting cycle must be fully completed that means until a possible 2- to
3-pole short circuit occurs.
6.
By actuating the release lever (Pos.-No. 6) the blades (Pos.-No. 12) will be returned into
the starting position. The cable is completely cut now.
7.
The operator of the safety cutting unit has to make sure e.g. by asking the net provider,
whether the right cable was cut. This is of special importance with deleted nets.
