DS DS/CLC/TR 60890 A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear
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DS DS/CLC/TR 60890 Document Information:
Title
A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear
Metode til vurdering af temperaturforhøjelse ved ekstrapolation af delvist typeprøvet tilbehør (PTTA) til lavspændings-fordelingsanlæg
Dansk Standard
Publication Date:
Jul 7, 2004
Scope:
The following method is applicable to enclosed PTTA or partitioned sections of PTTA without forced ventilation. Note 1: The influence of the materials and wall thicknesses usually used for enclosures are negligible on the steady state temperatures. The method is therefore applicable to enclosures mad of sheet steel, sheet aluminium, cast iron, insulating material and the like. Note 2: For open-type and dead-front PTTA, no temperature-rise assessment is needed if it is obvious that no excessive air temperatures are likely to rise.
Keywords:
- AIR
- ASSEMBLIES
- ASSESSMENT
- COMBINATION
- COMPOSITE DEVICES
- COOLING SURFACES
- DESIGN
- DETERMINATION
- ELECTRIC CONTROL EQUIPMENT
- ELECTRICAL ENGINEERING
- ENCLOSURES
- EXTRAPOLATION
- FORMULAE
- HEATING
- HEATING MEASUREMENTS
- HEATING-UP CHARACTERISTICS
- INSTALLATIONS
- INSTRUMENTS
- LOW VOLTAGE
- LOW- VOLTAGE EQUIPMENT
- LOW-VOLTAGE SWITCHGEAR
- LOW-VOLTAGE TECHNOLOGY
- MATHEMATICAL CALCULATIONS
- METHODS
- MONITORS
- PARTIAL
- QUALIFICATION TESTS
- RATINGS
- SWITCHGEAR
- SWITCHGEAR ASSEMBLIES
- TEMPERATURE RISE
- TEMPERATURE RISES
- TESTING
- VOLTAGE
- CONTROL
- LOW VOLTAGE SWITCHGEAR
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