Megger PPX30, User Manual, Page: 10 / 84

Safety, Hazard, and Warning Symbols on the Instrument
Table 1: Safety and hazard icons on the instruments outer case.
Icon Description
Warning about hazardous voltage and risk of injury or death from severe electrical shock.
Located above Leads Energized LED and near other voltage input or output elements.
Ground. Located on rear panel of instrument below ground terminal.
High voltage warning label. Located on the left side panel below the on/off switch and
power inlet/outlet connectors.
Test Related Warnings
„ Before connecting test leads , verify that circuits are not energized. Never connect the Baker Power Pack or
host tester units to an energized circuit.
„
Before connecting test leads , disconnect all external devices (such as capacitors and surge arrestors) from the
test circuit.
„ Two-party operation is recommended only when using proper equipment (such as the remote E-Stop) and when
taking appropriate precautions so that both operators are fully aware of all conditions at all times.
„
Always know what test is being performed and when test leads are energized. For example, do not adjust test
leads when operating a footswitch. Leads will have live voltage and severe electrical shock can result.
„ Upon completion of any Megohm, dielectric absorption (DA), polarization index (PI), DC HiPot, or Step Voltage
tests, be sure to short the winding to ground and allow sufficient time for discharge before disconnecting the
test leads. If you do not do this, voltage can build up on the winding. Some industry standards suggest allowing
a winding to discharge four times the total amount of time that DC voltage is applied to the winding. For
example, IEEE 95 suggests allowing a winding to discharge four times the total amount of time that DC voltage
is applied to the winding and no less than 2 hours.
„
If it is necessary to remove the tester leads prior to complete discharge of the circuit under test, short and
ground all leads using an appropriate jumper cable prior to removal of the test leads.
„ Make sure to disconnect the tester leads before energizing or powering up the motor.
„
Never attempt to test a winding with both host and power pack leads attached to the winding at the same time.
Damage to the tester will occur.
User Safety and General Operation
2 Baker Power Packs User Guide 71-061RC EN V2 www.megger.com