Test Instruction for the Factory Surveillance of
Information Technology Equipment according to VDE 0805 and Audio-, Video- and similar electronic apparatus according to VDE
0860 with or without  ENEC Mark
PM 391 E 2012-05-30  Seite / page 1/5
Q  Prüf- und Zertifizierungsinstitut  GmbH
Testing and Certification Institute
A COMPANY OF THE
Q  ASSOCIATION FOR ELECTRICAL, ELECTRONIC & INFORMATION TECHNOLOGIES
References
DIN EN 60950-1 - VDE 0805−1 Safety of information technology Part 1: general requirements
DIN EN 60065 --- VDE 0860
Safety of audio, video and  similar electronic apparatus Safety requirements
DIN EN 50514 --- VDE 0805−514
Audio, video and information technology equipment Production line test of electric safety during production
General requirements and tests ENEC-303, Annex O, Annex Z Requirements for manufacturers
1. General
This European standard defines production line procedures for the application during or after the production of completed equipment, devices or components which are approved according to DIN EN 60065 or DIN EN 600950-1 or where the conformity is approved and powered with an alternating or continuous current supply unit. The standard defines production line tests in reference to the electronic safety as well as the application of these procedures during or at the end of production of the apparatus which are approved according to DIN EN 60065 and DIN EN 60950-1 or declared as complying.
1.1 Routine test
These tests are carried out by the manufacturer on all manufactured products that bear or do not bear the ENEC Mark.
Tests for every single appliance during or at the end of production to indicate unallowed deviations in material and during production.
If the factory has a Quality System in compliance with EN ISO 9001, different tests may be carried out with agreement of the Certification Body. The test results shall be kept at the disposal of the Certification Body’s inspector.
1.2 Periodic Tests (only for products with ENEC-Mark)
For information technology equipment with ENEC Mark additional periodic test have to be carried out.
The tests are carried out by the manufacturer or on its behalf with at least the frequency indicated; the test results shall be kept at the disposal of the Certification Body’s inspector.
In selecting samples for periodic tests preference should be given to products whose characteristics are close to the limiting values.
1.3 Particular cases
With agreement of the Certification Body the tests and their frequency may be changed with respect to those indicated, if this is justified by the particular design of the product or by a particular constructive solution. These cases shall be reported to the ENEC Group.
2. Routine tests 100%
2.1 Visual check
Markings and workmanship have to be checked, i. e. checking of completeness of the pro-duct, correct mounting and fixing of all components; there shall be no visible defects and sharp edges which might cause damages or injuries.
2.2 Earth continuity test
For class I appliances the continuity of the protective earthing connection shall be checked between the protective earth contact of the mains or appliance inlet, or the protective earthing terminal in case of permanently connected apparatus, and
- the accessible conductive parts, including terminals regarded as accessible, which shall be connected to the protective earthing terminal and
- the protective earth contact of the socket-outlets respectively, if provided to deliver power to other apparatus.
The test current is 150% of the rating of the overcurrent device protecting the protective bonding conductor, but not less than 10A and not more than 25 A (alternating and continuous current) and has to be applied for any duration between 1s and 4s. The source shall have a no-load voltage not exceeding 12 V.
The resistance measurement should not exceed 0.1 •.
It is allowed to include the connecting cable (if existing) into the resistance measurement and if the result exceeds 0.1 • to deduct the earthing terminal resistance of the connecting cable from the value.
Note: Care should be taken that the contact resistance between the measuring peak and the conductive part to be tested does not falsify the measurement results
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2.3 Electric strength test
Routine tests for electric strength shall be carried out between the primary circuit and accessible conductive parts. For accessible secondary circuits it is permitted to test separately, before final assembly, subassemblies and components such as transformers, if the relevant insulation cannot be tested in the complete equipment, provided that the complete equipment complies with DIN EN 60065 or DIN EN 60950-1 as appropriate.
The insulation of the apparatus shall be checked by the following test
test voltage of substantially sine-wave form, having mains frequency or a d.c test voltage or a combination of both with a peak value as specified in Table 1 and Table 2, is applied between the supply terminals connected in parallel and
- Terminals regarded as accessible, and  - accessible conductive parts respectively
which may become hazardous live in the event of an insulation fault as a result of incorrect assembly.
Note 1: Terminals regarded as accessible and accessible conductive parts may be connected together during the electric strength test
Table 1 --- Test voltage for products with certification according to DIN EN 60950
Application of test voltage
Test Voltage
[V (peak) AC or DC]
Basic Insulation    2 120
(1500 s)
Double or reinforced Insulation    4 240
( 3 000 s)
Note: The test voltages given are the minimum test voltages to be applied. Higher voltages are allowed at the discretion of the manufacturer
Table2 --- Test voltage for products with certification according to DIN EN 60065
Application of test voltage
Test Voltage
[V (peak) AC or DC]
Nominal mains voltage ± 150 Nominal mains voltage > 150
Basic Insulation 1130 (s.) 2120
(s)
Double or reinforced Insulation    2 120 (s.) 3540
(2500  r.m.s)
Before the test voltage is applied, intimate contact shall be made between the specimen and the connection devices.
Initially it is allowed to apply not more than half of the prescribed test voltage then it is raised with a steepness not exceeding 1560 V/ms to the full value which is held for 1 s to 4 s.
Note 2: A steepness of 1560 V/ms corresponds to the steepness of a sine-wave with a mains frequency of 60 Hz.
During the test, mains switches and functional switches (if available) conductively connected to the mains, if any, shall be in on-position and it shall be ensured by suitable means that the test voltage is effectively connected to the specimen.
No flash-over or breakdown shall occcur during the test. The test voltage source shall be provided with a current sensing (over-current) device, which when activated gives an indication …unacceptable‘‘. When loaded up to and including the tripping current, the voltage source shall still deliver the prescribed voltage.
Note 3: The tripping current shall not exceed 30 mA.
accessible to sbTripping of the current sensing device is regarded as a flash-over or breakdown.
2.3.1 Induction coil with cutting function
A test alternating voltage of 4240 Vs (3000 Veff) is held for 1 s
- Primary and secondary winding
- Primary winding and core
- Secondary winding and core
Note : The test voltage, between the winding and the core depends on the construction and shall be appointed by the producer..
Samples for the application of test voltage for winding and core
Test voltage:
Double and reinforced insulation
Primary --- Secondary
4240 Vs (3000 Veff)
Double or reinforced insulation
Primary --- core
4240 Vs (3000 Veff)
Basic or additional insulation
Primary --- core
2120 Vs (1500 Veff)
Double or reinforced insulation
Secondary --- core
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4240 Vs (3000 Veff)
Basic or additional insulation
Secondary --- core
2120 Vs (1500 Veff)
3. Periodical Test (only for products with ENEC Mark)
A sample of each series/family (same basic construction) shall be subject to complete tests or the main critical tests depending on the results of the pre-license test according to the standard at least once a year.
4. Records of tests
All test results shall be kept available. The choice of support and format for reports is left to the manufacturer; separate form (one for each apparatus) or lists of apparatus, grouped according to the most suitable parameters (periods of time, model etc.) are equally acceptable. The only obligation is the availability of data and their immediate interpretability for all apparatus leaving the production line.
For every piece of equipment tested, the following data shall be filled:
− date of test;
− model of the equipment;
− serial number of the equipment or another identifier permitting the identification without ambiguity;
− value of earthing circuit resistance with the corresponding current value (*); − value of voltage applied during the electric strength test (*);
− quick-reference information that the whole set of tests has/has not been successful.
As an alternative to the values referred to with an (*) above, the information of the accomplishment of each test (e. g. pass or fail) is permitted, if the pass/fail criteria are described elsewhere in the test report.
The above-mentioned tests have to be specified by the manufacturer in a testing or working instruction. The performance of the tests has to be confirmed in writing.

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