Temperature Rise Limits

Infrascan Thermal Imaging Engineers compare the specific (hot) points on your thermal imaging report to the temperature rise limits tabled below. The closer the temperature is to the limit the more severe the fault. 

Infrascan has never had a major fault related  event in our 15 year history.

 Infrascan's interpretation of the Australian Standards:
AS 3768—1990
Surfaces of components

Description
For Metallic manual controls:
For Non Metallic manual controls: 

Touched in normal operation but not continuously held:
Metallic
Non Metallic

Accessible but not touched in normal operation
Metallic
Non Metallic 
Temperature rise above ambient 
55
65


70
80


80
90
Screwed contacts
 Uncoated copper + aluminium etc

Terminals for screwed or bolted connection to external conductors
50

50
AS 2467
Maintenance Procedures
Guidelines for the establishment of maintenance procedures.
AS/NZS 3439.1:2002 
Cable 
The operating temperature of unmarked PVC-insulated or elastomer-insulated cables is 75C. 

Other cables to a maximum of 105C. (Polythene, PVC, solid extruded PVC tubing, 1.0 mm thick, high temperature heat shrink tubing with a minimum wall thickness of 0.45 mm after shrinkage, etc).

This temperature must not be exceeded at any point where the insulation is relied upon.

Parts of Assemblies
Parts of ASSEMBLIES 

Terminals for external insulated conductors


Manual operating means: Metal
Manual operating means: Insulation

Accessible external enclosures & covers - metal 
Accessible external enclosures & covers - Insulation

Discrete arrangements of plug and socket-type connections

 
 Temperature rise above ambient
70


15
25

30
40

Equipment
Specific