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Ramp Test
The KT63 PLUS also includes a diagnostic Ramp test feature. In this mode rather than applying
a steady fault current and measuring the time taken for the RCD to trip, the KT63 PLUS gradually
increases the fault current and identifies the level of additional leakage at which the RCD trips.
This is particularly useful in diagnostic testing of circuits where nuisance tripping is a problem and
helps to identify the difference between an over sensitive RCD and excessive leakage from poor
insulation or equipment with high leakage.
Use the rotary switch to select the rating of the RCD.
Press the RCD multiplier button until the symbol is displayed.
Press the test button to start the test. The fault current applied will
increment in 3mA steps until the RCD trips.
If nuisance tripping on a circuit is a problem this function can be used to
retest the RCD with other appliances systematically connected and removed.
For example a 30mA RCD may trip at 12mA on ramp test with an appliance connected and then at
27mA with the appliance removed. You will know that the appliance is leaking approximately 15mA.
Phase rotation
Principle of Measurement
During phase rotation measurement the amplitudes and phase angles of the three inputs L1, L2, L3
are checked against limits, allowing for mild unbalance conditions. The indication 1-2-3 is displayed
for normal rotation (L2 lags L1) and 3-2-1 for reverse rotation (L2 leads L1).
Display of Phase rotation is Automatic when all three tests leads are connected to the 3 phase
supply:
Set the main rotary switch to PHASE.
Using three test leads, connect test leads to the L1 to Phase 1, L2 to Phase 2 and L3 to Phase 3.
The KT63 PLUS will display .1 .2 .3 or .1 .3 .2 depending on the direction of phase rotation.
PASS
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mA
