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DETERMINE THE PROPER SERIES
•
Tp : The highest temperature of the product to which a
cutoff is to be attached.
•
Th : The safe temperature range for use of the cutoff.
•
Ts : 24ºC (Tp-Th) (Apply 35ºC for Ts value when Tp is
higher than 170ºC.)
•
To : The heating temperature caused by electrical load
(Please refer temperature / current correlation curve)
•
+a :
1. Self heating of lead wire
2. Structure of ventilation or airtightness
3. Location of connecting terminal
4. Thickness of insulated covering material
5. Best condition value considering electric voltage changes
Tp + Ts + To +a = Applicable Temperature
SAFE TEMPERATURE RANGE
• The increasing temperature by remaining heat in the cutoff after melting is required to remain below Tm.
• The temperature of the area where a cutoff will be attached should not reach over Th under normal usage conditions.
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