DEVELOPMENT, PRODUCTION, DELIVERY
Detection and locating, measuring equipment, water leak detectors, cable locators, cable and pipe locators
17
If the utility forms part of the complete electrical circuit “source – utility – consumer” (as per
illustration) then in case of the specific electric properties of these chain loops the utility locating
via the “non-contact” connection method («In» / «An» / «clamp»)is quite likely without additional
earthing.
In this example “revocable” signal current of “high” frequency (0.5…33kHz) “overlaps” the
current of “low” (industrial) frequency (50 / 60Hz) which is not preventing from the utility locating
and the flow path for “revocable” current of the signal already provided.
2)
If the internal transmitting inductor is in
use
then the casing of the device should be located
right above the utility under examination (to set
the reference point “In_axis” on the front panel
above the axis of the utility and oriented parallel to
its direction). The utility locator shouldn’t be used
nearby the transmitter location in order to avoid
the immediate induction connection (apart from
the utility).
If the utility is not a part of the complete electrical
circuit then both its ends should be earthed for
creating a path for earth current “return” of the
signal.
3) If the external induction transmitting
antenna is in use
“An” then it should be located
as close as possible to the examined utility and
coplanar with it. The utility locator shouldn’t be
used nearby the transmitting antenna in order to
avoid the immediate induction connection (apart
from the utility).
If the utility is not a part of the complete electrical
circuit then both its ends should be earthed for
creating a path for earth current “return” of the
signal.
The earthing should be done at a possible
distance from the utility to reduce mutual
cancellation of the “tracing” and “revocable\
return” signal current.
4) If the induction transmitting “clamp” is in
use
then the utility should be wrapped by them in
any available point. The utility locator shouldn’t be
used near the “clamp” location in order to avoid
the immediate induction connection (apart from
the utility) despite the fact that in this case this
connection is not as evident as in the “antenna”
modes “In” and “An”.
If the utility is not a part of the complete electrical
circuit then both its ends should be earthed (for
creating a path for earth “return” of the “revocable”
current signal. The earthing should be done at a
possible distance from the utility to reduce mutual
cancellation of the “tracing” and “revocable\
return” signal current.
Содержание SUCCESS-438.15N
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