Seaward's lightweight, portable Primetest 250 PAT tester is unique in its range of safety tests. The PrimeTest 250 will perform all of the tests required by the IEE Code of Practice, including RCD trip, protective conductor current and touch current where required. The unit also includes a 250V DC insulation test suitable for testing sensitive electrical appliances and surge protected leads. The PrimeTest 250 is ideal for ensuring that all workplace electrical equipment does not pose a danger to users -including three-phase machinery. As a result, 3-phase industrial plant and equipment used in factories, workshops, schools and colleges can all be tested safely and effectively. The unique range of tests incorporated in this lightweight and highly versatile instrument means that most workplace appliances can be tested using long life battery power. However, when protective conductor current or touch current measurements are required, simply connecting a mains supply will automatically select the correct test sequence. The PrimeTest 250 is designed for ease of use and carries out all electrical safety tests against pre-set limits with measured test results and clear PASS/FAIL indication on a large display. The PrimeTest 250 is an easy-to-use tester which is ideal for those who need to test a wide range of products.
The Primetest 250 is a portable PAT (Portable Appliance Tester) designed for in‑house safety testing engineers, electrical contractors and service technicians. It performs all tests required by the IEE Code of Practice, including earth continuity, insulation resistance, equivalent leakage, IEC lead, protective conductor current, touch current, RCD trip and power‑socket checks.
Key features include automatic test sequences, battery operation for most tests, mains power for protective‑conductor and touch‑current measurements, a large display with clear PASS/FAIL indication, and optional accessories for three‑phase and RCD testing. The device is supplied with a 13 A maximum current input and supports a range of test voltages and durations as detailed in the specifications.
| Earth continuity test voltage | 9V DC nominal |
|---|---|
| Earth continuity test duration | 2 s nominal |
| Earth continuity display range | 0.01 Ω to 19.99 Ω |
| Insulation resistance test voltage | 250/500 V DC @1 mA nominal, < 2 mA (s/c) |
| Insulation resistance display range | 0.01 MΩ to 19.99 MΩ |
| Equivalent leakage test voltage | 4 A0 V nominal AC 50 Hz open circuit |
| Equivalent leakage test duration | 2 s – 30 s nominal |
| Equivalent leakage display range | 0.1 mA to 19.99 mA |
| Supply voltage (max current) | 13 A |
| RCD trip test voltage range | 225 V – 254 V AC |
It performs earth continuity, insulation resistance, equivalent leakage, IEC lead, protective conductor current, touch current, RCD trip, and power‑socket checks.
Results are shown on a large display with a clear PASS/FAIL indication.
Yes, accessories are required for three‑phase and RCD testing.
The unit can be powered from a supply up to 13 A maximum current.