
Radiodetection Tx-121 | Isolation Transformer | 3-Phase Live Cable Signal Injection
The Radiodetection Tx-121 Isolation Transformer is a high-performance diagnostic interface designed for electrical utility professionals. It functions by isolating a transmitter from live network voltages while simultaneously allowing a high-power tracing signal to pass onto 3-phase cables. This allows for the pinpointing of core-to-core and phase-to-phase shorts that are typically invisible to standard induction methods, significantly reducing excavation costs by identifying faults with surgical precision.
How does the Tx-121 enhance utility cable locating?
The Tx-121 enables professionals to apply a locate signal from a Tx-10 transmitter directly onto live 3-phase systems. This setup is specifically engineered to identify phase-to-phase insulation faults and core-to-core shorts that other diagnostic tools cannot detect.
Is the Tx-121 safe for use on live electrical networks?
Yes, the unit is strictly rated for use on live three-phase networks up to 600V CAT III standards. It ensures operator safety by providing a robust electrical barrier between the live network voltage and the signal transmitter.
What housing and accessories are included with the Tx-121?
The device is housed in a rugged, high-visibility yellow Pelican-style case for maximum field durability. It includes specialized heavy-duty connection leads designed to withstand the rigors of industrial utility environments.
| Network Rating | Live 3-phase up to 600V CAT III |
| Primary Application | Phase-to-phase insulation faults / Core-to-core shorts |
| Compatibility | Tx-10 Transmitter |
| Housing Material | Rugged Pelican-style case |
| Color | High-visibility Yellow |
| Included Components | Heavy-duty connection leads |
Compatible Radiodetection Accessories
- For the required signal source, use the Radiodetection TX10 Transmitter.
- To facilitate different cable interfaces, consider the Radiodetection Direct Connection Lead.
- For live network connectivity, the Radiodetection Live Plug Connector offers additional interface options.

