Moulded case circuit breakers

3 CONTENT Range 4 Protection Releases 5 Salient Features 8 Accessories 10, 14 Technical data 12 Time Current Characteristics 15 Overall Dimensions 17 SN4 SN3 SN2 SN1

MOULDED CASE CIRCUIT BReAKERS 4 RANGE SN1 Rated Current 20, 25, 32, 40, 50, 63, 80, 100 A Release Thermal-Magnetic SN2 Rated Current 63, 80, 100, 125, 160, 200, 250 A 40, 63, 100, 160, 250 A Release Thermal-Magnetic Electronic SN3 Rated Current 320, 400, 500, 630 A 63, 160, 250, 400, 630 A Release Thermal-Magnetic Electronic SN4 Rated Current 800, 1000, 1250, 1600 A Release Electronic Moulded case circuit breakers Iskra are assurance for your electrical installations and equipment. They are designed to reliably protect all installation system against overloads and short-circuits. You can choice:...

MOULDED CASE CIRCUIT BReAKERS 5 PROTECTION RELEASES Thermal-Magnetic Release Protection Settings SN1 SN2&SN3 Overload 80 % - 100 % In 80 % - 100 % In Short circuit 9 In (fixed) 6 - 10 In Earth fault external Electronic Release Features of Thermal-Magnetic Release Adjustable protection overload settings Adjustable protection short-circuit settings True RMS sensing No contact with live parts Features of RC10 Electronic Release Overload protection with inverse time delay Short circuit protection with selectable time delay Earth fault protection with selectable time delay Neutral protection with...

MOULDED CASE CIRCUIT BReAKERS 6 PROTECTION RELEASE Features of RC20 - Communication Capable • Power on LED • Backlit LCD display • Scroll buttons • Push to trip button • All features of RC10 release are incorporated • Metering for current parameters • Protection against unbalanced load / single phasing • I ²t protection • Neutral protection • Cold load protection • User friendly navigation system • Selfpowered RC20 Rated Current In A For 400 A & 630 A Overload (Phase) Current setting (A), Ir (Ir = xIn) 0,4 to 1,0 in steps of 0,1 Time delay, tr (s) (Inverse) 3, 6, 10, 15, 30 at 6 Ir Protection...

MOULDED CASE CIRCUIT BReAKERS 7 Protection Release Additional Features of RC20 Current unbalance Current setting (A) xIn 10 % to 100 % In in steps of 5 % Time delay (s) 1 to 10 in steps of 0,5 Protection mode On / Off Cold load pickup Enable / Disable Temperature rise Alarm / Trip At 80 ºC / At 100 ºC Metering Current Phase, Neutral and Earth Display Backlit LCD

MOULDED CASE CIRCUIT BReAKERS 8 SALIENT FEATURES Faster Tripping: The unique speed contact system accelerates the opening of contacts during short circuit. This ensures faster tripping an ultimate current limiting feature. The result-very low let-through, cut-off current and fault clearing time. Mechanical Anti-reclosing: This unique feature ensures that under short circuit conditions, the contacts open and latch even before the release gives a trip command to the mechanism. This avoids contact re-closing and bounce. Low watt loss: The entire current carrying path is optimally designed to achieve...

MOULDED CASE CIRCUIT BReAKERS 9 SALIENT FEATURES Common Internal accessories: The internal accessories remain same across SN2 / SN3 / SN4 range* and they are easy to install click fit type. *Except under-voltage release No side bias: Internal accessories can be mounted on the either side. Terminal finger proofing: Front terminal plates conceal the terminals to prevent human contact thus achieving complete finger proofing. Terminal shrouding: Terminal shrouds cover spreader terminals preventing human contact with terminals (TS available for SN1). Release shrouding: Release is shrouded from the...

MOULDED CASE CIRCUIT BReAKERS 10 Accesories Internal Accessories Range of MCCBs are offered with click-fit type, easily installable internal accessories. There is no need to open main cover and no live parts are accessed during installation. Any accessory can be fitted on any side enhancing flexibility (except under-voltage release). Auxiliary Switch List of Internal Accessories Auxiliary Switch 2 change-over (AUX2-SN1, AUX2-SN2/3/4) Trip Indicator 1 change-over (TA1-SN2/3/4) & 2 change-over (TA2-SN1) Auxiliary Switch & Trip Indicator 1 + 1 change-over (AUXTA-SN1, AUXTA-SN2/3/4) Shunt Release...

MOULDED CASE CIRCUIT BReAKERS 11 Accesories Electrical Operating Mechanism Features Clear ON/OFF/TRIP indication Safety interlock: EOM will not operate if - EOM cover is open - EOM is not properly fixed on MCCB Permits manual operation, if required Padlock facility for locking in OFF position Easy access to the protection setting on the MCCBs Electrical Operating Mechanism (EOM) Applications Facilitates remote operation of MCCBs Facilitates use in process automation applications and auto change over schemes Technical Specifications Type Designation EOM-SN2 EOM-SN3 Operating Voltage 24, 48 VDC,...

MOULDED CASE CIRCUIT BReAKERS 12 Type SN1 - 100 SN2 - 250 No. of Poles 3 3/4 Rated Current In A 20, 25, 32, 40, 50, 63, 80, 100 40, 63, 80, 100, 125, 160, 200, 250 Standards IEC/EN 60947-2 Approvals KEMA, CB KEMA & CB only for MCCB’s with RC10 Rated Operational Voltage Ue V 600 690 Rated Insulation Voltage Ui V 690 750 Rated Impulse withstand Voltage Uimp kV 6 8 Rated Frequency Hz 50 / 60 50 / 60 Ambient temperature °C -5 °C to +55 °C Storage temperature °C -35 °C to +70 °C Reference Ambient Temperature °C 40 40 Utilisation Category A A Versions Standard Standard SN2- 250S High SN2- 250H Extra...

MOULDED CASE CIRCUIT BReAKERS 14 Accesories Mechanical Interlock kit Earth fault release (EFR) Earth fault currents: - up to 200 A - from 250 A to 400 A - from 630 to 800 A Ordering data for MCCB Example: SN2-250S3 63A 36kA 10In SN2-250 - Type S - Version 3 - No. of poles 63A - Rated current 36kA - Breaking capacity 10In - Kind of release (10In, RC10 and RC20) Mechanical Interlock Schemes (M INT) Features For 3-pole & 4-pole versions Suitable for SN2 & SN3 frames M INT with base plate