User Manual

GMC-I Messtechnik GmbH 17
The cut-out capacity of the fuse is 10 kA at a rated voltage
of 1000 V AC/DC and ohmic load.
• The 10 A current measuring ranges are protected by a
10 A / 1000 V AC/DC fuse. The cut-out capacity of the
fuse is 30 kA at a nominal voltage of 1000 V AC/DC and
ohmic load.
• Replacement of the fuses is described in section 17.
10.1 AC Current Measurement with (Clip-on) Current Transformer
10.1.1 Transformer Output mA/A
Caution
If current transformers are operated with an open circuit on the
secondary side, e. g. due to defective or disconnected leads, a
blown fuse in the multimeter, or a wrong connection, danger-
ously high voltages may occur at the connectors. Therefore,
make sure that the current circuit of the multimeter and sec-
ondary winding of the transformer connected to the multimeter
form an intact circuit. Connect the transformer to the and
mA or A sockets. The maximum permissible operating voltage
is the nominal voltage of the current transformer. When reading
the measured value, take into account the transformer ratio
and the additional error in indication.
Transformer output METRALINE DM 61
The METRALINE DM 61 shows the switching position and the
corresponding sockets. Connect a (clip-on) current trans-
former with a transmission ratio of 1000:1 to this socket. The
measured values are then displayed directly in the „A“ range.