Burkert Type 8035 - Manual (Page 23)

21
Installationandwiring
Type 8025 /8035 Batch
7.6.1 equipotentiality of the installation
To▶ensure▶the▶equipotentiality▶of▶the▶installation▶(power▶supply▶-▶
device▶-▶fluid):
▶ →
Connect▶together▶the▶various▶earth▶spots▶in▶the▶installation▶to▶
eliminate▶the▶potential▶differences▶that▶may▶occur▶between▶dif-
ferent▶earthes.
▶ →
Observe▶faultless▶earthing▶of▶the▶shield▶of▶the▶power▶supply▶
cable,▶at▶both▶ends.
▶ →
Connect▶the▶negative▶power▶supply▶terminal▶to▶the▶earth▶to▶sup-
press▶the▶effects▶of▶common▶mode▶currents.▶If▶this▶connection▶
cannot▶be▶made▶directly,▶a▶100▶nF/50▶V▶capacitor▶can▶be▶fitted▶
between▶the▶negative▶power▶supply▶terminal▶and▶the▶earth.▶
▶ →
Special▶attention▶has▶to▶be▶paid▶if▶the▶device▶is▶installed▶on▶
plastic▶pipes▶because▶there▶is▶no▶direct▶earthing▶possible.▶
Proper▶earthing▶is▶performed▶by▶earthing▶together▶the▶metallic▶
instruments▶such▶as▶pumps▶or▶valves,▶that▶are▶as▶close▶as▶pos-
sible▶to▶the▶device.▶If▶no▶such▶instrument▶is▶near▶the▶device,▶
insert▶metallic▶earth▶rings▶inside▶the▶plastic▶pipes▶upstream▶and▶
downstream▶the▶device▶and▶connect▶these▶parts▶to▶the▶same▶
earth.▶The▶earth▶rings▶must▶be▶in▶contact▶with▶the▶fluid.
+
-
(*)
12-36 V DC
Power▶cable▶shield
Equipment▶such▶as▶
valves,▶pumps,...
Plastic▶pipes
Power▶supply
+
-
(*)
12-36VDC
Power▶supply
Metallic▶pipes
Power▶cable▶shield
*) ▶If▶a▶direct▶earth▶connection▶is▶not▶possible,▶fit▶a▶100▶nF▶/▶50▶V▶
capacitor▶between▶the▶negative▶power▶supply▶terminal▶and▶the▶
earth.
Fig. 15: 8025 compact version and 8035, equipotentiality skeleton
diagrams
English