ISA T 2000 - Page 7

DOC. MIE11110 Rev. 5
Page
7
of
110
The connection to ground is provided through the mains supply
cable; however, for added safety, the Product should be
connected to ground using the dedicated socket.
IF THE GROUND IS NOT AVAILABLE AT THE MAINS SUPPLY,
CONNECT THE TEST SET TO GROUND USING THE DEDICATED
SOCKET.
The following table lists a number of situations that are potentially
hazardous to the user and/or to the test set. Please consider this
list, and check the situation in case of doubt.
SITUATION CAUSE OF RISK CONTROL
Feeding the
transformer
during the test
In this situation very high
currents or voltages could be
applied to the test set, that
could be severely damaged;
also the operator would be
exposed to an high risk
Disconnecting
the transformer
during the test
A very hig
h voltage can be
generated by the inductance
of the transformer under
test.
Filtered mains
The AC voltage can be a
squared waveform rather
than sinusoidal; the test set
operates at the minimum
supply level, with low
efficiency.
Supply
waveform
Connection to a
live wire
The connection can be
dangerous to the user, to the
test set and even the plant.
Test before
connecting
Long generation
of all outputs
Possible danger of over-
heating components,
specially with high ambient
temperature
Check burden
and duration