Using a bimetal, snap acting disc as the sensing and actuating element,
the Klixon 7855 series thermal
circuit breaker provides trouble free over current protection for high current applications.
Available in two configurations:
•
7855-6: Sealed construction, manual reset
•
7855-7: Sealed construction, automatic reset
Applications
•
Main harness protection for heavy trucks, buses, construction equipment,
off–road vehicles, and RV’s
Trip Curve
Approximate Time — Current Characteristics at 77°F (25°C)
Solid Lines: 7855-6 and 7855-7
Derating Curve
Approximate Effect of Ambient Temperature on Ultimate Trip
Performance characteristics are based on room temperature (77°F). Consult derating curve at left for ambient temperatures
significantly higher or lower than standard room temperature.
Example: At 77°F the device is calibrated to hold at 110% of rated current (1) and trip at 138% of rated current (2).
At 140°F, the same device will hold at approximately 92% of rated current (3), and trip at approximately 120% of rated current (4).
