Datasheet

QUINT4-PS/3AC/24DC/5
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6 High-voltage test (HIPOT)
This protection class I 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 high-
voltage 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.
6.1 High-voltage dielectric test (dielectric strength
test) and why must it be performed?
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 60950-1.
The high-voltage test is performed with a test voltage of at
least 1.5kVAC 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 high-
voltage 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.
High-voltage tests up to 0.8kVAC/
1.1kVDC can be performed as described.
For high-voltage tests > 0.8kVAC/
1.1kVDC, the gas-filled surge arrester must
be disconnected.
The test voltage should rise and fall in ramp
form. The relevant rise and fall time of the
ramp should be at least seconds.