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PS-60 User Guide 6125-2200
6. High-Voltage Test (HIPOT)
This protection class II power supply is subject to the Low Voltage Directive and is factory
tested. During the HIPOT test (high-voltage test), the insulation between the input circuit and
output circuit is tested for the prescribed electric strength values, for example. The test
voltage in the highvoltage range is applied at the input and output terminal blocks of the
power supply. The operating voltage used in normal operation is a lot lower than the test
voltage used.
High-voltage tests up to 2 kV AC / 2.8 kV DC can be performed as described. The
test voltage should rise and fall in ramp form. The relevant rise and fall time of the
ramp should be at least two seconds.
6.1 High-Voltage Dielectric Test (Dielectric Strength Test)
In order to protect the user, power supplies (as electric components with a direct connection
to potentially hazardous voltages) are subject to more stringent safety requirements. For this
reason, permanent safe electrical isolation between the hazardous input voltage and the
touch-proof output voltage as safety extra-low voltage (SELV) must always be ensured. In
order to ensure permanent safe isolation of the AC input circuit and DC output circuit, high-
voltage testing is performed as part of the safety approval process (type test) and
manufacturing (routine test).
6.2 High-Voltage Dielectric Test During the Manufacturing Process
During the manufacturing process for the power supply, a high-voltage test is performed as
part of the dielectric test in accordance with the specifications of IEC/UL/EN 61010-1. The
high-voltage test is performed with a test voltage of at least 3 kV AC / 4.2 kV DC or higher.
Routine manufacturing tests are inspected regularly by a certification body.
6.3 High-Voltage Dielectric Test Performed by the Customer
Apart from routine and type tests to guarantee electrical safety, the end user does not have
to perform another highvoltage test on the power supply as an individual component.
According to EN 60204-1 (Safety of machinery - Electrical equipment of machines) the power
supply can be disconnected during the high-voltage test and only installed once the high-
voltage test has been completed.
6.3.1 Performing High-Voltage Testing
If high-voltage testing of the control cabinet or the power supply as a stand-alone component
is planned during final inspection and testing, the following features must be observed.
– The power supply wiring must be implemented as shown in the wiring diagram.
– The maximum permissible test voltages must not be exceeded.
Avoid unnecessary loading or damage to the power supply due to excessive test voltages.
For the relevant applicable test voltages and insulation distances, refer to the
corresponding table (see technical data: electric strength of the insulation section).
