ELECTRICAL INSULATING MATERIALS - THERMAL ENDURANCE PROPERTIES - PART 4-2: AGEING OVENS - PRECISION OVENS FOR USE UP TO 300 DEGREE C
International Electrotechnical Committee
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 Constructional requirements
4.1 General
4.2 Mechanical requirements
4.2.1 Oven
4.2.2 Iso-box
4.3 Temperature control and indicator systems
5 Performance requirements
5.1 Temperatures
5.2 Maximum temperature different
5.3 Maximum temperature fluctuation
5.4 Maximum temperature deviation
5.5 Type and rate of ventilation
5.6 Exposure volume
6 Test methods and procedure
6.1 Temperature and related parameters
6.1.1 Practical aspects
6.1.2 Calculations
6.1.3 Results
6.2 Rate of ventilation
7 Report
8 Conditions of use and instructions for in-service
monitoring by the user
8.1 Conditions of use
8.2 Procedure
8.3 In-service monitoring
Annex A (informative) Test method to determine the rate of
ventilation
A.1 - Sealed oven
A.2 - Ventilated oven
A.3 - Calculation
Annex B (informative) Examples for calculation of temperature
deviation
B.1 - Error of measurement
Covers minimum performance criteria for electrically heated and ventilated precision ovens for thermal endurance evaluation of electrical insulating materials and other similar applications. Covers ovens intended to operate over all or part of the temperature range from 20K above room temperature up to 300 degrees C. Covers two methods to achieve the required performance; a) where required performance is achieved by precise control of temperature in a single chamber oven; and b) where the required performance is achieved by use of a second chamber (iso-box) within the chamber of a single-chamber oven. The aim is to reduce magnitude of any temperature changes to an acceptable level while retaining required air change and circulation levels.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 15 |
