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9.5.9
Testing the safety extra-low voltage
The safety extra-low voltage test [} page 46] is intended to check the rated voltage of test
samples with SELV / PELV voltages.
Requirements
• Approved safety measuring lines
• Please observe the requirements for measuring [} page 71].
• The test sample is disconnected from the mains.
• Make sure that you are familiar with the procedure for manual [} page 77] and automatic
[} page 76] testing.
• Make sure that you know the necessary measuring points.
• The test sample is connected according to the connection diagram.
• Please observe the operating manual and the technical data of the test sample.
Figure 24: Testing the safety extra-low voltage, Class I (connection diagram, circuit diagram)
1 Safety extra-low voltage (Class I, U
The shock-proof plug of the test sample is plugged into the test socket of the device.
Use the test probes for measuring with correct polarity between both poles on the
secondary side of the test sample.
Procedure
1. Start the test.
2. Use the test probe for measuring on the poles of the secondary side.
3. Check the measured value for compliance with the technical data of the test sample. Please
note that a battery voltage must be applied for the test sample to correctly switch through an
output voltage.
92
1
BENNING ST 755+ / ST 760+
)
a
Testing
9.5 Individual tests
5284 / 08/2023 en
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