In the auto-test mode the instrument automatically runs through all the six standard tests whilst the operator only has to stand by the RCD and reset it every time it trips. All the results can be viewed using the recall button.
The ramp test slowly increases tripping current until the RCD trips. The display is in mA. It will show up RCDs that are out of specification and those that will be susceptible to nuisance tripping. It can also be used to indicate which circuits have high leakage currents.
The x 2 I ÄN test satisfies the advisory note for verification of disconnection times as in the 17th Edition regulation 4220.127.116.11 The Kewtech KTD50 also measures mains voltage and incorporates a full socket tester that checks for 18 socket wiring conditions. Last but not least this tester has the unique feature of a mains polarity test. It will check that the mains incoming supply is not in the very hazardous condition of line/phase reversal.
Comprehensive RCD tester
Includes RCD ramp and auto-test
Full socket tester functionality built in
Unique mains supply polarity test
(checks that line and neutral are not switched at the supply)
Measures mains voltage
Special x 2 I ÄN RCD function
Tests selective RCDs.