Seaward PrimeTest 250

PT250 - Comprehensive handheld manual PAT tester

Seaward PrimeTest 250

Seaward PrimeTest 250

PAT Testers

PrimeTest 250 Comprehensive handheld manual PAT tester

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 electrical equipment.

*For 3 phase and RCD testing, accessories are required.


  • Clear LCD Display
  • All portable appliance tests listed in the IET Code of Practice
  • Tests class I and II equipment including IT and business equipment
  • Extension and IEC lead tests
  • Socket polarity check
  • RCD tests on 30mA
  • 3 Phase differential leakage current*
  • Voltage AC and DC

*Requires additional adaptors


Earth continuity0.01 Ω - 19.99 Ω, 200mA minimum into 2Ω
Pass valuePass value 0.2 Ω
Insulation resistance0.01 MΩ - 19.99 MΩ, 250/500VDC @1mA nominal
Pass value1 MΩ Class I, 2 MΩ Class II
Equivalent leakage0.15mA to 9.99mA, 40V nominal AC
Pass value0.75mA CL I / 0.25mA CL II
IEC lead test5V DC nominal
IEC checksChecks Live/Neutral for c/c, s/c, and crossed
Protective conductor
current (earth leakage)
0.15mA to 9.99mA, Supply voltage, max current 13A
Pass value0.75 mA/3.50mA user selectable with 0.75mA as default
Touch current0.10mA to 5.00mA, Supply voltage, max current 13A
Pass value0.25mA
RCD trip time10mA / 30mA rms, 0ms to 500ms @ 0 & 180 Degrees auto switched
Pass value200ms
3 phase differential leakage current

*Requires 3 phase adaptor accessory
0.10mA to 9.99mA, 3 phase supply voltage
Pass value3.5mA
Power socket check225 - 254V AC max current 13A
Line potential phase to earth
Line potential phase to neutral
Line potential neutral to earth
Power supply6 x AA batteries / 225-245V AC for powered tests
Dimensions260 x 100 x 55 mm
Weight800 g