IEC 60598-1 Cu and Zn Test Chain Short-circuit Protection for SELV Parts Temperature Rising Testing
IEC 60598-1 Cu and Zn Test Chain Short-circuit Protection for SELV Parts Temperature Rising Testing
Standards & Clauses:
IEC 60598-1:2014 “Luminaries-Part1: General requirements and tests” clause 4.26 and figure 29
Samples and Restrictions:
Luminaires uninsulated accessible SELV parts of opposite polarity
Application:
Used to process unintended short-circuiting temperature rising testing for uninsulated accessible SELV parts of opposite polarity, to verify there are adequate means is provided to prevent the impairing safety.
Test Principle:
The test chain of sufficient length of an uncoated metal, having links and made of 63% Cu / 37% Zn, and having a resistance value of 2.5 Ω/m ±20% when stretched with a load of 200 g/m, cooperates with load test, to achieve the short-circuiting temperature rising testing for uninsulated accessible SELV parts of opposite polarity
Structure:
Made of 63% Cu / 37% Zn
Technical Parameters:
| Material | 63% Cu / 37% Zn |
| Dimensions & Shape | Conforms to IEC 60598-1:2014 figure 29,diameter: Ф2±0.2mm, the metal chain consists of links, uncoated |
| Resistance | 2.5 Ω/m ±20% when stretched with a load of 200 g/m |
| Test Method |
1. The resistance value of test chain should be checked before each measurement, to ensure the resistance value to be 2.5 Ω/m ±20% when stretched with a load of 200 g/m. 2. Measure the distance of the spacing between the polarities of the SELV parts, mark X, unit: cm. 3. Put the test chain on specimen, weights=15×X or maximum weight 250g should be hanged on each end of the test chain. 4. A thermocouple is placed at the appropriate position of the test sample and connected to the temperature measurement device. 5. Access 0.9-1.1 times of rated voltage to test sample. 6. Monitor that the test chain shall not melt through, or shall any part of the type test sample reach a temperature exceeding standard required value (refer to IEC 60598-1:2014 tables 12.1 and 12.2) |
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