SCB1-3-25 NOVARIS | Alldatasheet
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NDS3.826 - Page 1 / 2 Product Datasheet SCB1-3-25 Surge Circuit Breaker The SCB1-3-25 is a purpose designed SPD disconnector. It may be used to provide over current protection for any shunt conne cted SPD with an I rating up to 200kA or an I rating to 25kA. The SCB1 -3-25 is generally used at main switchboards. It effectively coordinates wi th any upstream supply circuit breaker or fuse. Operation All power line SPDs must be protected by an over cu rrent protective device (OCPD). Traditionally these have been fuses or circuit breakers but neither are really suitable to effectively protect the SPD in the event of its failure or in the event of a prolonged system overvoltage. Under normal operating conditions an SPD draws no more than a few milliamps of AC cur rent from the supply but in the event of a transient disturbance it must instantly pass many thousands of amps. Fuses or circuit breakers chosen to pass this impulse current will not protect the SPD against an AC over voltage nor necessarily prevent its failure to a short circuit before the f use or circuit breaker trips. The fuses or circuit breaker ratings required to pass these impulse currents present coordination challenges with upstream OCPDs . The SCB1-3-25 is designed to trip at AC currents more than 3 amps bu t will pass impulse currents up to 25kA 10/350us. T ests have proven that the SCB will trip during a phase to phase voltage fault across a phase to neutral SPD with no damage to the SPD. The SCB may simply be reset. With a tri p current of only 3A the SCB easily coordinates with upstream OCPDs. Novaris SPDs uniquely utilize electronic alarms and can detect the loss of supply due to tripping of the SCB. Compatibility The SCB1-3-25 can be used with all Novaris SD, SDN, SDEV and IDD products designed for L V distribution up to 200kA 8/20us rating and for SG products up to 25kA 10/350us. max imp Wiring Dimensions Generated Fri Sep 17 2021
72 Browns Road, Kingston Tasmania 7050 Australia
NDS3.826 - Page 2 / 2 Product Datasheet Electrical Specications Rated operating voltage 230VAC Rated insulation voltage 400VAC Impulse current withstanding (10/350 μs) 25kA Tripping value under power frequency current 3±1A Rated service short-circuit breaking capacity 50kA The breaking time of short-circuit power frequency current <40ms Mechanical life & Electrical life 1000 times Mechanical Specications Minimum operating temperature g -25°C Maximum operating temperature h 60°C Minimum operating humidity k 5% Maximum operating humidity j 95% Mounting method a TS35 DIN Rail Environmental rating f IP20 Enclosure material s Polycarbonate Enclosure nish d Green Terminal capacity minimum i 2.5mm² Terminal capacity maximum i 25mm² Length l 85mm Width ; 35mm Height z 72mm Other Specications Product Code x SCB1-3-25 Shipping Specications Weight v 204g Standards IEC61643-11 Low voltage surge protection devices - requirements and tests SCB tripping characteristics Generated Fri Sep 17 2021