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Chapter 3 –
TnT+
Portable Appliance
Test Instructions
[continued]
RCD TEST
Menu 2
The TnT+ displays and maintains the last, set trip current value.
If the user wishes to change the value of the trip current the following steps enable the
changes.
Press and release F3 to display test
current.
Up
- This button raises the trip current in
1mA increments to 500mA. Hold the
button and the value will scroll faster the
longer depressed. Once 500mA limit is
reached the value will then loop over and
start again from 0mA.
Down
- This button decreases the trip current in 5mA increments. Hold the button
and the value will scroll faster the longer depressed. Once 0mA limit is reached the
value will then loop over and start again from 500mA.
Set
- This button sets the selected current for the next trip time test. The TnT+ will
then return to the current trip time test screen.
The displayed trip time is in milliseconds. This is the time taken for the RCD device to trip
once the injected fault current has been applied. The TnT+ injects a true fault current
value using a real time compensation calculation of the actual voltage at the time of test.
Hence delivering a true and accurate trip current no compensation of voltage fluctuations
corrections required.
Voltage range 210 – 270V ac.
As stated above this screen sets the multiplier of
the set test current. Use the F1 or F2 keys to scroll
through
the multipliers X0.5, X1.0, X5.0 of the set current.
Maximum output current = 500mA..
I.E if set test current were 100mA then 100 X 5.0 =500mA.
If set test current = 200mA then maximum out put 5 x 200ma =1A is out of range. Unit will
not deliver this output current and display on Screen “OUT of RANGE”.
Summary of Contents for TNT+
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