6.2 Electrical Wiring Check
WARNING
The electricity mains should only be connected to the injection mold when
all electrical connections are grounded and the mold is closed.
1. Check that each wire and thermocouple has a zone number.
2. Check that wires are organized and taped together by zone and plug.
3. Check all wires are secured in wire channels.
4. Connect all power leads and thermocouple wires to mold plugs.
6.3 Electrical Safety Testing
Electrical safety tests shall be performed according to DIN EN 60204-1,
paragraph 18, and NFPA79. Testing guidelines are given below, however, the
standards identied earlier in the introduction are the nal authority.
6.3.1 Verify Equipment to its Technical Documentation
First, verify that the electrical equipment complies with its technical
documentation.
6.3.2 Insulation Resistance Test
Measure the insulation resistance between each pin of the Mold-Masters
power connector, in particular the heating circuit and ground.
The insulation resistance is measured at 500 V
DC
. The insulation resistance
must not be less than 1 MΩ.
If this value is not reached when heating, the cause is often moisture inside
the heating element, which should be removed using a control unit equipped
with this function.
Where a mold has not been in use for several weeks or months, it should be
retested.
6-2
© 2020 Mold-Masters (2007) Limited. All Rights Reserved.
ELECTRICAL TESTING
Hot Runner User Manual
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