Instruction manual

Performing a Time Test:

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 200 – 265V ac

Timed Test 30mA

0 Deg.

180 Deg

Settings

RCD Test Options:

F3 – Change to select test options: This allows the user to set the trip current level, 5mA to 500mA. The RCD type can also

be select here depending on if the unit is a type I or type II see the next section for explanation. From the options menu press

F2 to change the current level and F3 to change the RCD type.

Options:

Set Current

Set RCD Type

Adjusting the current level:

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 F2 from the options section 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.

Changing the RCD type:

Depending on the RCD, the RCD type needs to be selected from the options menu. These options change the pass / fail values

when performing RCD tests. Please make sure that you have the correct RCD type selected. The RCD types are:

Type I:

Has a trip time of < 40mS and a trip current of < 10mA. These types of RCD's are mainly used on sites containing medical

equipment. These types of RCD's must be compliant with AS3551.

Type II:

Has a trip time of < 300mS and a trip current of < 30mA. Unless specified on the RCD device nearly all RCD will be this type.

The this is the default setting on new units.

Selects type I and saves to memory

Selects type II and saves to memory