Seaward 3-Phase Adaptors, 5 Star, TPA Series

Seaward Brand: Seaward

A range of Seaward 3-Phase Adaptors from the TPA Series. These unique test adaptors allow earth continuity and protective conductor current measurements to be carried out on 3-phase machinery, as required by the IEE Code of Practice.

The TPA range have been designed and manufactured for use with the PrimeTest 250 PAT tester. They allow the quick and easy measurement of the protective conductor current without removing covers, or disconnecting wires to gain access to the protective conductor in the in-coming supply. Simply connect the adaptor in-line with the 3-phase equipment under test and connect to the PrimeTest 250.

The adaptors are powered from the 3 phase supply and require no additional power supply or batteries. At the push of a button, earth continuity and protective conductor current tests will commence and a digital reading of the measured values will be given on the PrimeTest 250 display.

Available in both 16A and 32A versions with star (5 pin) plugs and sockets.

  • Quick and easy: No need to remove covers or disconnect wires
  • Compact and highly portable
  • Enables earth continuity and protective conductor current tests
  • BS 4343 plugs and sockets
  • Available with a maximum load current of 16A or 32A
  • Manufacturer: Seaward
Description Image Product Buy Pricing (Ex VAT) Type
Seaward 391A920 3 Phase Leakage Adaptor 5 Star 16A
Seaward 391A920 3 Phase Leakage Adaptor 5 Star 16A
Standard range
Order code: 90-4326
MPN: 391A920

Available to back orderBack-order availability date - 13/12/2025
1+ £245.14
Price per unit Ex VAT
Leakage adaptor
Seaward 391A910 3 Phase Leakage Adaptor 5 Star 32A
Seaward 391A910 3 Phase Leakage Adaptor 5 Star 32A
Standard range
Order code: 90-4327
MPN: 391A910

Available to back orderBack-order availability date - 13/12/2025
1+ £245.14
Price per unit Ex VAT
Leakage adaptor
Mftrs. Part No.391A920 3391A910
Order code90-432690-4327
Type3 Phase Leakage Adaptor3 Phase Leakage Adaptor
Protective conductor current0.1mA to 9.99mA0.1mA to 9.99mA
Accuracy±10% ±2 digits±10% ±2 digits
Supply Voltage415V ±10% at 50Hz415V ±10% at 50Hz
Maximum load current16A for TPA 5/1632A for TPA 5/32
Environmental RatingIP Rating IP40IP Rating IP40
Overvoltage CategoryCAT III 300VCAT III 300V
Operating Temperature Range0°C to +4°C0°C to +4°C
Storage Temperature Range-25°C to +65°C-25°C to +65°C


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