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Standard test probes and crocodile clips are supplied for connection to the
circuit under test.
Application
This instrument may be connected live to earth or between live
conductors of systems that have a rated voltage of 600 V a.c. rms to earth
and an installation (overvoltage) Category III or lower.
This means that the instrument may be connected to any fixed wiring of a
building installation, but not to primary supply circuits such as overhead
cables. To maintain user safety and ensure accurate measurements, only
use the test leads supplied by Megger Limited.
The display shows the fault voltage limit, ‘25 V’ or ‘50 V’.
If the fault-voltage display is active, a bar-graph display will also appear.
5. Press the [0º/180º] button to change the limit setting from 25V to 50V
and back.
6. Press the [TYPE] button to turn bar-graph display ON or OFF.
7. Press the [TEST] button to exit from the set-up menu.
Test leads
All test leads form part of the measuring circuit of the instrument and
must not be modified or changed in any way, or be used with any other
electrical instrument or appliance.
The power cord supplied with the Megger testers is a test lead that forms
part of the measuring circuit of the instrument. The overall length of this
lead must not be altered. If the power cord plug is not suitable for your
type of socket outlets, do not use an adapter. You may change the plug
once only by cutting the cord as close to the plug as possible and fitting a
suitable plug.
The colour code of the cord is:
Earth (Ground) Yellow/Green
Neutral Blue
Phase (Line) Brown
NOTE:
A plug severed from the power cord must be destroyed, as a plug
with bare conductors is hazardous in a live socket outlet.
Test lead connection
The supplied test leads should be connected to the appropriate sockets
on the rear of the instrument marked L0 and L1, or to the 3 way test
socket.
RCDT300_UG_en_V01 07/05/2004 12:07 pm Page 10
