Seaward Powercheck 1557 PAT/Installation Tester Checker

Tests Earth Continuity, Insulation Resistance, RCD Trip Time, RCD Trip current, Loop, PE Conductor Current, Touch Current & flash test verification
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Typically ships in 2-4 working days

Seaward Powercheck 1557

The PowerCheck 1557 is the only comprehensive PAT and Installation instrument verification system which is compatible with all manufacturers electrical Installation and PAT testers . This checkbox is housed in a rugged, drop-proof enclosure.

Seaward Powercheck 1557 Key Features:

  • PAT and Installation Tester verification checkbox
  • Rugged, robust and drop proof
  • Tests to BS7671 / EN 61577 / IEE Code of Practice
  • Confirm test meter performance
  • NICEIC & IET compliant
  • Colour coded for ease of use
  • Compatible with all electrical Installation and PAT testers

The Seaward Powercheck 1557 tests to BS 7671, BS EN 61557, IET Onsite Guide and IEE Code of Practice. This unit has full instrument verification against all relevant standards and confirms performance between verifications (this is information required by NICEIC, ELECSA, Corgi and others).

The Seaward PowerCheck 1557 tests for Full Earth Continuity, Insulation Resistance, RCD Trip Time, RCD Trip Current, Loop, PE Conductor Current, Touch Current and Flash test verification.


Installation Test Instruments

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

PAT Functions

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.