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© ABB STOTZ KONTAKT - 1 07-05-2002 ABB MCB Tripping – Characteristics MCB´s Knowhow ABB STOTZ KONTAKT.

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Presentation on theme: "© ABB STOTZ KONTAKT - 1 07-05-2002 ABB MCB Tripping – Characteristics MCB´s Knowhow ABB STOTZ KONTAKT."— Presentation transcript:

1 © ABB STOTZ KONTAKT ABB MCB Tripping – Characteristics MCB´s Knowhow ABB STOTZ KONTAKT

2 © ABB STOTZ KONTAKT DESTO/X2 RH - 2 ABB MCB tripping characteristics I 1 - Thermal non-tripping current rsp. Low test current - Thermal tripping current rsp. High test current - Electromagnetic non-tripping current rsp. test current: hold surges of I 3 - Electromagnetic tripping current rsp. test current: trip at least at I 4 General Time / current relation 1. Thermal tripping 2. Electromagnetic trippingBasics: 40 0, ,6 0,4 0,2 0,1 0,06 0,02 0,01 1 1, I 3 I 4 I 1 I 2 Tripping time seconds minutes

3 © ABB STOTZ KONTAKT DESTO/X2 RH - 3 ABB MCB tripping characteristics DC-current increases the magnetic tripping values by factor 1,5Basics: Magnetic tripping: AC, 100 Hz= factor 1.1 AC, 200 Hz= factor 1.2 AC, 400 Hz= factor 1.5 DC= factor 1.5 Thermal tripping is not dependent on frequency

4 © ABB STOTZ KONTAKT DESTO/X2 RH - 4 ABB MCB tripping characteristics "B"-characteristic acc. EN rsp. IEC 898: standard for miniature circuit breakers to be used in residential or similar applications Thermal non tripping: 1,13 x I n Thermal tripping:1,45 x I n Magnetic non tripping:3 x I n Magnetic tripping:5 x I n Applications: low duty applications without starting or inrush currents 40 0, ,6 0,4 0,2 0,1 0,06 0,02 0,01 1 1, B minutes seconds Tripping time Multiple of rated current

5 © ABB STOTZ KONTAKT DESTO/X2 RH - 5 ABB MCB tripping characteristics “C"-characteristic acc. EN rsp. IEC 898: standard for miniature circuit breakers to be used in residential or similar applications Thermal non tripping: 1,13 x I n Thermal tripping:1,45 x I n Magnetic non tripping:5 x I n Magnetic tripping:10 x I n Applications: low duty applications with medium starting or inrush currents and low loop impendance 40 0, ,6 0,4 0,2 0,1 0,06 0,02 0,01 1 1, C minutes seconds Tripping time Multiple of rated current

6 © ABB STOTZ KONTAKT DESTO/X2 RH - 6 ABB MCB tripping characteristics “D"-characteristic acc. EN rsp. IEC 898: standard for miniature circuit breakers to be used in residential or similar applications Thermal non tripping: 1,13 x I n Thermal tripping:1,45 x I n Magnetic non tripping:10 x I n Magnetic tripping:20 x I n Applications: high duty applications with very high starting or inrush currents but low loop impendance 40 0, ,6 0,4 0,2 0,1 0,06 0,02 0,01 1 1, D minutes seconds Tripping time Multiple of rated current

7 © ABB STOTZ KONTAKT DESTO/X2 RH - 7 ABB MCB tripping characteristics "B,C;D"-characteristics acc. EN rsp. IEC 898: Standard for miniature circuit breakers to be used in residential or similar applications. For low duty installations Rough leveled features for average applications Restricted thermal protection, allowing : 1,45 x I n Extreme high of „D“ characteristic may lead to delayed tripping time, damaging conductors and equipment Using „D“, low loop impedances, meaning larger cross sections of conductors is a „must“. 40 0, ,6 0,4 0,2 0,1 0,06 0,02 0,01 1 1, DC B minutes seconds Tripping time Multiple of rated current

8 © ABB STOTZ KONTAKT DESTO/X2 RH - 8 ABB MCB tripping characteristics “STOTZ“„Z“„K“characteristics acc. EN rsp. IEC 947-2: standard for industrial switchgear „The tailormade solution for commercial and industrial applications“ Compared to tripping characteristics „B“,“C“, „D“ the STOTZ characteristics „K“ and „Z“ offer a higher degree of protection. This means a higher degree of safety in both, planning and operation

9 © ABB STOTZ KONTAKT DESTO/X2 RH - 9 ABB MCB tripping characteristics “Z"-characteristic acc. EN rsp. IEC 947-2: standard for industrial switchgear Thermal non tripping: 1,05 x I n Thermal tripping:1,2 x I n Magnetic non tripping:2 x I n Magnetic tripping:3 x I n A sensitive characteristic to protect highly sensitive equipment such as: 0,14mm 2 cable sets applications with limit switches reed contacts in burglar alarm systems sensor technology actuators in bus systems printed boards with its semiconductors 40 0, ,6 0,4 0,2 0,1 0,06 0,02 0,01 1 1, DC B Z minutes seconds Tripping time Multiple of rated current

10 © ABB STOTZ KONTAKT DESTO/X2 RH - 10 ABB MCB tripping characteristics 40 0, ,6 0,4 0,2 0,1 0,06 0,02 0,01 1 1, DC B K “K"-characteristic acc. EN rsp. IEC 947-2: standard for industrial switchgear Thermal non tripping: 1,05 x I n Thermal tripping:1,2 x I n Magnetic non tripping S270:8 x I n Magnetic tripping S270:12 x I n Magnetic non tripping S280:10 x I n Magnetic tripping S280:14 x I n The right choice for high duty application with high starting or inrush currents: Motors, fan sets Power supply units: i.e 24V DC supply for intelligent building automation systems Charging sets; i.e for electrical forklift trucks Extra low voltage lamps, high performance tools, electronic ballasts Welding- and control power transformer minutes seconds Tripping time Multiple of rated current

11 © ABB STOTZ KONTAKT DESTO/X2 RH - 11 ABB MCB tripping characteristics


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