Clamp-on transformers are special accessories for cable tracers and they are intended to be used when direct galvanic connection to cable is not possible. Such targets are e.g. mains cables or cables whose terminals are not available. Also telecom cables, which can´t be connected to without interference, can often be traced with Clamp-on transformers. The PM34 fits around a cable with 34mm maximum diameter.
When operating with mains cables always remember that clamp-on transformers should never be connected to single mains (phase) wires carrying more than 30A current.
Compatible devices: CTT45, TMT30, WTT20, WTT10, CTT10 (XTT25 and KXT15)
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Connecting around the shielding of a cable
Tracing signal is good if one of the wires of the cable (or the shielding) is earthed at both ends. If there are branch-offs or intermediate earthings, signal gets weaker behind them.
Feeding around a wire which is grounded at both ends
This method gives also a good signal. One should however note that when operating with mains cables that clamp-on transformers should never be connected to single mains (phase) wire carrying more than 30A current.
Feeding around wires that are grounded at the far end
This is also a good way of using clamp-on, as long as here is not too high current on a single wire.
|Jungtimis||2.5m silicone cord with 4mm banana plugs|
|Matmenys||165 x 76mm, diameter 34 mm|
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|PM34/PM80 Technical description||English||1118||PM34/80 Datasheet, EN|