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Seaward Powercheck 1557 PAT/Installation Tester Checker

Seaward Official Distributor
  • Allows the user to verify testing functions on any PAT tester
  • Conforms to regulations such as BS7671, EN61577 and the IET Code of Practice
  • Verification on functions including earth bond continuity, insulation resistance, and RCD (trip time)
In stock


The Seaward Powercheck 1557 PAT/Installation Tester Checker is a powerful checkbox that can be used to verify the performance of any PAT tester or installation tester. It conforms to regulations including BS7671, EN61577 and the IET Code of Practice.

It is capable of checking numerous testing functions found on safety testers such as earth bond continuity, insulation resistance, RCD (trip time), RCD (trip current), PE conductor current, loop impedance, touch current and flash testing. The briefcase-style design means the checker will be protected in challenging environments.

Key Features

  • Full earth continuity
  • Insulation resistance
  • RCD trip time
  • RCD trip current
  • Loop testing
  • PE conductor current
  • Touch current
  • Flash test


Earth Continuity Verification

  • Test current In >200mA indication
  • Test voltage 4V < Un > 24V indication
  • Test resistances 0.5ohm and 2ohm

Insulation Resistance Verification

  • Open circuit test voltage: 250V < Un < 375V indication
  • 500V < Un < 750V indication
  • 1000V < Un < 1500 indication
  • Test current In >1mA into 1000ohm/V
  • Max test current Ik <2mA
  • Test resistances 0.25Mohm, 0.5Mohm, 1.0Mohm

Earth Loop Verification

  • Test values Loop, Loop+1ohm, Loop+180ohm

RCD Verification

  • Trip current 10mA, 30mA, 100mA
  • Trip Times 20ms, 40ms, 500ms
  • Test current multiplier 1/2rn, Irn and 5 Irn verification

Voltage Verification

  • Test Voltage 240V AC rms test output

Earth continuity verification

  • Test resistances 0.2ohm and 2ohm

Insulation Resistance verification

  • Test resistances 500kohm, 1Mohm and 2Mohm

PE Conductor current

  • Test currents* 0.1mA, 0.25mA and 0.5mA

Flash Test current

  • Test currents* 0.5mA, 1mA and 1.5mA


  • Power supply: 230V AC ±10%
  • Dimensions / Weight : 210mm x 145mm x 85mm / 1kg
  • *actual values are dependent upon mains supply voltage. Tabulated values for mains voltages of 210V to 250V are supplied with the instrument.