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128 Selectivity, line protection, backup protection Selectivity between incoming circuit-breaker NZM... and outgoing circuit-breaker NZM... Selectivity, line protection, backup protection Selectivity between incoming circuit-breaker NZM... and outgoing circuit-breaker NZM... 129 Circuit-breakers, switch-disconnectors up to 1600 A 2 Incoming circuitbreaker Outgoing circuitbreaker Selectivity 415 V AC between circuit-breakers enables separate shut-down of faulty system sections. Incoming circuit-breaker 1 and outgoing circuit-breaker 2 operate selectively if in the event of a short-circuit at position 2 only the outgoing circuit-breaker 2 trips out. System sections 3 and 4 continue to operate. Moeller SK1230-1157GB-INT Moeller SK1230-1157GB-INT Incoming circuit-breaker Incoming circuit-breaker NZM...1-A... NZM...2-A... NZM...2-VE... NZM...3-AE... NZM...3-VE... NZM...4-AE... NZM...4-VE... [kA] 25(50)(100) 25(50)(100)(150) 50(100)(150) 50(100)(150) 50(100)(150) 50 (100) 50 (100) [A] 20...40 50 63 80 100 125 160 20...40 50 63 80 100 125 160 200 250 100 160 250 250 400 630 250 400 630 630 800 1000 1250 1600 630 800 1000 1250 1600 Outgoing circuit-breaker I cu(415V) Prospective short-circuit current (kA). Set the overload and short-circuit release of the incoming circuit-breaker to the max. value. Prospective short-circuit current (kA). Set the overload and short-circuit release of the incoming circuit-breaker to the max. value. [kA] NZM...1-A... 20 ... 40 25 ... – – 0.5 0.7 0.8 1.5 1.5 – – 0.6 0.8 1.5 1.5 1.5 2 3 2 5 7.5 7.5 20 20 12.5 25 25 T T T T T T T T T T 50 25 ... – – – 0.6 0.8 1.5 1.5 – – – 0.8 1.5 1.5 1.5 2 3 2 5 7.5 7.5 20 20 12.52 25 25 T T T T T T T T T T 63 25 ... – – – – 0.8 1.5 1.5 – – – – 1.5 1.5 1.5 2 3 2 5 6 6 15 15 11 20 20 T T T T T T T T T T 80 25 ... – – – – – 1.5 1.5 – – – – – 1.5 1.5 2 3 – 5 6 6 15 15 11 20 20 T T T T T T T T T T 100 25 ... – – – – – – 1.5 – – – – – – 1.5 2 3 – 5 6 6 15 15 11 20 20 T T T T T T T T T T 125 25 ... – – – – – – – – – – – – – – 2 3 – 5 6 6 15 15 11 20 20 T T T T T T T T T T 160 25 ... – – – – – – – – – – – – – – 2 3 – 5 6 6 15 15 11 20 20 T T T T T T T T T T NZM...2-A... 20 ... 40 25 ... – – 0.5 0.6 0.8 1 1 – – 0.5 0.6 0.8 1 1.2 1.6 2 1 2 4 6 15 15 11 20 20 T T T T T T T T T T 50 25 ... – – – 0.6 0.8 1 1 – – – 0.6 0.8 1 1.2 1.6 2 1 2 4 6 15 15 11 20 20 T T T T T T T T T T 63 25 ... – – – – 0.8 1 1 – – – – 0.8 1 1.2 1.6 2 1 2 4 6 15 15 11 20 20 T T T T T T T T T T 80 25 ... – – – – – 1 1 – – – – – 1 1.2 1.6 2 – 2 4 6 15 15 11 20 20 T T T T T T T T T T 100 25 ... – – – – – – 1 – – – – – – 1.2 1.6 2 – 2 4 6 15 15 11 20 20 T T T T T T T T T T 125 25 ... – – – – – – – – – – – – – – 1.6 2 – – 4 6 15 15 11 20 20 T T T T T T T T T T 160 25 ... – – – – – – – – – – – – – – – 2 – – 4 5 10 10 10 15 15 T T T T T T T T T T 200 25 ... – – – – – – – – – – – – – – – – – – – – 10 10 – 15 15 T T T T T T T T T T 250 25 ... – – – – – – – – – – – – – – – – – – – – 10 10 – 15 15 T T T T T T T T T T NZM...1-M... 20 ... 40 25 ... 50 – – – – 0.8 1 1 – – – – 0.8 1 1.2 1.6 2 1 2 4 6 15 15 11 20 20 T T T T T T T T T T 50 25 ... 50 – – – – – – 1 – – – – – – 1.2 1.6 2 – 2 4 6 15 15 11 20 20 T T T T T T T T T T 63 25 ... 50 – – – – – – 1 – – – – – – 1.2 1.6 2 – 2 4 6 15 15 11 20 20 T T T T T T T T T T 80 25 ... 50 – – – – – – – – – – – – – – 1.6 2 – 2 4 6 15 15 11 20 20 T T T T T T T T T T 100 25 ... 50 – – – – – – – – – – – – – – – 2 – – 4 6 15 15 11 20 20 T T T T T T T T T T NZM...2-M... 20 ... 25 ... – – – – – – – – – – – – – – – – – – 2 6 7 10 7 10 12 20 20 50 T T 20 20 50 T T 160 25 ... – – – – – – – – – – – – – – – – – – – 6 7 10 7 10 12 20 20 50 T T 20 20 50 T T 200 25 ... – – – – – – – – – – – – – – – – – – – – 7 10 – 10 12 20 20 50 T T 20 20 50 T T NZM...2-VE... 100 50 ... – – – – – – – – – – – – – 1.2 1.6 2 – 1.2 2 6 7 10 7 8 11 20 20 50 T T 20 20 50 T T 160 50 ... – – – – – – – – – – – – – – – – – – 2 6 7 10 7 8 11 20 20 50 T T 20 20 50 T T 250 50 ... – – – – – – – – – – – – – – – – – – – – 7 10 – 8 11 20 20 50 T T 20 20 50 T T NZM...2-ME... 90 50 ... – – – – – – – – – – – – – 1.2 1.6 2 – – 2 6 7 10 5 10 12 T T T T T T T T T T 140 50 ... – – – – – – – – – – – – – – – – – – – 6 7 10 5 10 12 T T T T T T T T T T 220 50 ... – – – – – – – – – – – – – – – – – – – – 7 10 5 10 12 T T T T T T T T T T NZM...3-AE... 250 50 ... – – – – – – – – – – – – – – – – – – – – 5 7.5 – 10 12 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 400 50 ... – – – – – – – – – – – – – – – – – – – – – 7.5 – – 12 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 630 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – T/80 T/80 T/80 T/80 – T/80 T/80 T/80 T/80 NZM...3-VE... 250 50 ... – – – – – – – – – – – – – – – – – – – – 3.5 4 – 10 12 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 400 50 ... – – – – – – – – – – – – – – – – – – – – – 4 – – 12 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 630 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – T/80 T/80 T/80 T/80 – T/80 T/80 T/80 T/80 NZM...3-ME... 220 50 ... – – – – – – – – – – – – – – – – – – – – 3.5 4 – 10 12 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 350 50 ... – – – – – – – – – – – – – – – – – – – – – 4 – – 12 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 T/80 450 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – T/80 T/80 T/80 T/80 – T/80 T/80 T/80 T/80 NZM...4-AE... 630 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – 10 15 20 20 – 10 15 20 20 800 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – – – 20 20 – – – 20 20 1000 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – – – 20 20 – – – 20 20 1250 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – – – – 20 – – – – 20 1600 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – NZM...4-VE... 630 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – 10 15 20 20 – 10 15 20 20 800 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – – – 20 20 – – – 20 20 1000 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – – – 20 20 – – – 20 20 1250 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – – – – 20 – – – – 20 1600 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – NZM...4-ME... 550 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – – – 20 20 – – – 20 20 875 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – – – – 20 – – – – 20 1400 50 ... – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – Notes 1 3 4 T: total selectivity Circuit-breakers, switch-disconnectors up to 1600 A
130 Selectivity, line protection, backup protection Line protection, backup protection Circuit-breakers, switch-disconnectors up to 1600 A Protection of PVC insulated cables against thermal overload with short-circuits In accordance to VDE 0100 part 430 the cables and conductors must be protected against overload and short-circuit. In circuit-breakers NZM, the overload protection is implemented via the adjustable, currentdependant time-delayed overload releases. Minimum protected cross-section mm 2 copper NZM...1(-4)-...20 6 NZM...1(4)-...25 – 160 10 NZM...2(-4)-...20 – 250 4 NZM...3(-4)-...250 – 630 16 NZM...4(-4)-...630 – 1600 95 Short-circuit protection is provided by adjustable instantaneous releases, which open the main contacts in less than 25 ms. The short-circuit total opening time restricts the temperature rise of the cable to a minimum. Moeller SK1230-1157GB-INT The tables indicate the minimum conductor cross-section reliably protected by circuit-breakers during a shortcircuit. (Operating voltage U n = 415 V) Backup protection Between NZM(N)(H)(L) incoming circuit-breaker and NZMB(N)(H)... outgoing circuit-breaker Incoming circuit-breaker a NZM1 NZM2 NZM3 I n Up to 160 A Up to 250 A Up to 630kA a I cu 25 kA 50 kA 100 kA 25 kA 50 kA 100 kA 150 kA 50 kA 100 kA 150 kA Outgoing circuit-breaker b I cu (415 V) I n NZMB1 25 kA Up to 160 A 25 50 100 25 50 100 100 50 100 100 b NZMN1 50 kA Up to 160 A – 50 100 – 50 100 100 50 100 100 NZMH1 100 kA Up to 160 A – – 100 – – 100 100 – 100 100 NZMB2 25 kA Up to 250 A 25 50 100 25 50 100 150 50 100 150 NZMN2 50 kA Up to 250 A – 50 100 – 50 100 150 50 100 150 NZMH2 100 kA Up to 250 A – – 100 – – 100 150 – 100 150 NZMN3 50 kA Up to 630 A – – – – – – – 50 100 150 NZMH3 100 kA Up to 630 A – – – – – – – – 100 150 Where the prospective fault current at the point of installation of circuit-breakers is very high, it is conventional to use NZMN(H)(L) current-limiting circuitbreakers. An attractively priced alternative is to fit a NZMN(H)(L) current-limiting circuit-breaker at the point in the network upstream of NZMB(N)(H) standard circuitbreakers, if the fault level is too high for NZMB(N)(H) switches. The table indicates which current-limiting circuitbreakers NZMN(H)(L) in combination with NZM(B)(N)(H) are to be used to provide protection at the network locations with high short-circuit capacities. The selectivity limit is determined by the response current of the non-delayed short-circuit release in the upstream incoming circuit-breaker. In many applications this is sufficient. between NZM...1-A... incoming circuit-breaker and FAZ-B(C)/PLSM-B(C)... outgoing circuit-breaker I cc Outgoing circuit-breaker Incoming circuit-breaker NZMB1-A... NZMN1-A... NZM... FAZ.../ NZM FAZ-(2)(3)(4)(N)-B(C)... 0,5 – 16 25 kA 30 kA 20 – 40 20 kA 20 kA 50, 63 15 kA 15 kA PLSM-B(C)...(/...) 0,5 – 16 25 kA 30 kA 20 – 40 20 kA 20 kA 50, 63 15 kA 15 kA between NZM...2-A... incoming circuit-breaker and FAZ-B(C)/PLSM-B(C)... outgoing circuit-breaker I cc Outgoing circuit-breaker Incoming circuit-breaker NZMB2-A... NZM... FAZ.../ NZM FAZ-(2)(3)(4)(N)-B(C)... 0,5 – 10 25 kA 50 kA 13 – 32 25 kA 30 kA 40 – 63 20 kA 20 kA PLSM-B(C)...(/...) 0,5 – 10 25 kA 50 kA 13 – 32 25 kA 30 kA 40 – 63 20 kA 20 kA NZMN(H)(L)2-A...
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Product Range Catalogue | 2006 Swit
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2 System overview Circuit-breakers,
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4 Overview Circuit-breaker, switch-
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8 Circuit-breakers Thermomagnetic r
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12 Circuit-breakers Electronic rele
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16 Circuit-breakers Thermomagnetic
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20 Circuit-breakers Electronic rele
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24 Switch-disconnectors 3 pole Circ
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26 Overview Circuit-breakers, switc
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30 Circuit-breakers for North Ameri
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48 Engineering Auxiliary contacts,
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Page 91 and 92: 136 Tripping characteristics Let-th
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Page 107 and 108: 156 Technical data Undervoltage rel
Page 109 and 110: 158 Technical data Data Management
Page 111 and 112: 160 Technical data Fieldbus connect
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222 Part number list Circuit-breake
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