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AIR CIRCUIT BREAKERS
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sigmaelektrik
.com
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GENERAL
Sigma SFA/SDA series intelligent Air Circuit Breakers are suitable
for use in commercial buildings or industrial plants where safety
and reliability of power supply is an important requirement.
Main Features;
•
Fixed and Drawable versions
•
Rated current from 630A to 6300A AC and rated voltage of 690 V.
•
Short Circuit Breaking Capacity 80kA~120kA (effective value);
•
Rated working voltage 690V AC
•
Three or four poles;
•
Microprocessor controlled intelligent trip unit for all round protection
•
Manual or motor operated stored energy drive mechanism for direct or remote actutation.
•
Ambient temperature: -5 ~ +40, and average temperature in 24 hours below +35 (except for special orders)
•
Comply with EN 60947-2 and VDE 0660.
Environment conditions For Operation and Installation
•
Altitude should be less than 2000m.
•
Relative humidity: not exceeding 50% at the maximum ambient temperature. higher humidity would be permitted, but the
lowest average temperature in a month not exc35°C during the most moist moth, and the maximum monthly average relative
humidity not exceeding 90% in that month, and giving consideration the dews on the goods surface, which would appear due to
temperature change.
•
Pollution degree 3 grade.
•
The breakers used on ships can operate reliably under normal vibration.
•
The breaker should be installed in compartment of switch - board and door frame should be fixed additionally. Protection grade
is up to IP40