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According to IEC 61558-1, related requirement as follows.
27.3.1 External accessible parts
External parts of insulating materials shall be resistant to ignition and spread of fire.
Compliance is checked by subjecting enclosures and other external accessible parts to the glow-wire test with the temperature of the glow wire as follows:
– 650 °C for enclosures
– 650 °C for parts retaining current carrying (keeping in position) parts in position and terminals for external conductors which carry a current up to 0,2 A during normal operation
– 750 °C for parts retaining (keeping in position) current carrying parts in position and terminals for external conductors with fixed connection (e.g., soldering) which carry a current exceeding 0,2 A during normal operation
– 850 °C for parts retaining (keeping in position) current carrying parts in position and terminals for external conductors with non-fixed connection which carry a current exceeding 0,2 A during normal operation
No glow wire tests are required for foils in thin sheet form with a thickness of up to 0,2 mm.
27.3.2 Internal parts
Parts of insulating materials retaining (keeping in position) current carrying parts in position shall be resistant to ignition and spread of fire.
Compliance is checked by subjecting the parts of insulating materials to the glow-wire test with the temperature of the glow wire as follows:
– 550 °C for internal insulating material not retaining (not keeping in position) current carrying parts in position
– 650 °C for coil formers (bobbins)
– 650 °C for parts retaining (keeping in position) current carrying parts in position and terminals for external conductors which carry a current up to 0,2 A during normal operation
– 750 °C for parts retaining (keeping in position) current carrying parts in position and terminals for external conductors with fixed connection (e.g., soldering) which carry a current exceeding 0,2 A during normal operation
– 850 °C for parts retaining (keeping in position) current carrying parts in position and terminals for external conductors with non fixed connection which carry a current exceeding 0,2 A during normal operation.
No glow wire tests are required for foils in thin sheet form with a thickness of up to 0,2 mm.° |
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发表于 2017-8-4 20:21:39
发表于 2017-8-5 09:29:45
发表于 2021-5-13 19:10:45
