106963 datasheet(12/25 Pages) PHOENIX

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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 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 / 2.2 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 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.

6.4

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.

Figure 1

Potential-related wiring for the high-voltage

test

Key

The test voltage should rise and fall in ramp

form. The relevant rise and fall time of the

ramp should be at least seconds.

For the relevant applicable test voltages and

insulation distances, refer to the

corresponding table (see technical data:

electric strength of the insulation section).

No.

Designation

Color coding

Potential

levels

AC input circuit

Red

Potential 1

High-voltage

tester

Signal contacts

Green (optional) Potential 2

DC output circuit Blue

Potential 2

L/+

N/-

DC OK

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