NF50 AND NF100 CIRCUIT BREAKER QUICK START MANUAL 1. SAFETY PRECAUTIONS the neutral wire cannot be detected. • When there are two terminal screws for the neutral pole, tighten the Carefully read the safety precautions prior to use the circuit breaker screws alternately.
NF50 AND NF100 CIRCUIT BREAKER QUICK START MANUAL • Do Not Block Ventilation Ports Do not block the ventilation ports. Electromagnetic force applied per 1m conductor (During 3-phase short-circuit) The breaker performance could drop. • Avoid Direct Sunlight Make sure that the breaker is not subject to...
Page 5
NF50 AND NF100 CIRCUIT BREAKER QUICK START MANUAL n PRECAUTIONS Inspection Model Criterion Remarks • Withstand Voltage Test A guide for the test is given on the items Are any of the following. Do not perform a withstand voltage test exceeding these conductors No conductor must be loose.
NF50 AND NF100 CIRCUIT BREAKER QUICK START MANUAL • If the intensity of the fault current cannot be estimated, measure DANGER Continuing user of a circuit breaker which has reached its the insulation resistance. If the specified value (5MΩ) has not service life can result in the following problems.
NF50 AND NF100 CIRCUIT BREAKER QUICK START MANUAL 3. MODEL NUMBER SELECTION NF100-HRU Trip Amperage Rated Current (A) See Table Above Symbol Number of Poles 2 Poles 3 Poles Symbol Molded Case Circuit Breakers 50-SVFU 100-HRU 4. DIMENSIONS NF50-SVFU 5. AMBIENT TEMPERATURE NF50-SVFU M5×0.8 screw...
NF50 AND NF100 CIRCUIT BREAKER QUICK START MANUAL 6. INTERNAL CONNECTION DIAGRAM 7. OPERATING CHARACTERISTIC CURVES NF50-SVFU NF50-SVFU Test button Test button (UL 489) Power Power 30min Load side Load side 20min source side source side 14min 10min Max. (3A~30A)...