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The PowerCheck 1557 is the only comprehensive PAT and Installation instrument verification system in one rugged, drop-proof enclosure. It allows on-going performance checks to be carried out on test equipment to ensure accurate measurement between calibration intervals. Spot problems as soon as they occur and avoid the potentially large cost of retesting installations or appliances because an instrument is found to be inaccurate during calibration.
The PowerCheck 1557 fully tests Earth Continuity, Insulation Resistance, RCD Trip Time, RCD Trip Current, Loop, PE Conductor Current, Touch Current and Flash tests. It can be used on with earth continuiy or earth bond testers up to 25A.
It can be used to verify loop impedance or RCD testers on RCD protected circuits - without tripping the RCD.
It tests to BS 7671, BS EN 61557, IET Onsite Guide and IEE Code of Practice. It has full instrument verification against all relevant standards and confirms performance between verifications (this is information required by NICEIC, ELECSA, Corgi and others).
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
ADDITIONAL INFORMATION
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.