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1 This international site allows you to access all the Merlin Gerin products in just 2 clicks via comprehensive range data-sheets, with direct links to: b complete library: technical documents, catalogs, certificates, FAQs, brochures b selection guides from the e-catalog. b product discovery sites and their Flash animations. You will also find illustrated overviews, news to which you can subscribe, a discussion forum, the list of country contacts These technical guides help you comply with installation standards and rules i.e.: the electrical installation guide, the protection guide, the switchboard implementation guide, the technical booklets and the co-ordination tables all form genuine reference tools for the design of high performance electrical installations. For example, the LV protection co-ordination guide - discrimination and cascading - optimises choice of protection and connection devices while also increasing markedly continuity of supply in the installations. 120
2 Compact NS Masterpact NW Additional Presentation 6 Functions and 15 Dimensions and connection 61 Electrical diagrams 87 Installation recommendations 103 Compact NS100 to NS Tripping curves 122 Compact NS400-NS Tripping curves 125 Masterpact NW10 to NW Tripping curves 126 Compact NS100 to NS Current-limiting curves 132 Current-limiting curves for circuit breakers équipped with magnetic trip units for direct current 133 Protection discrimination 134 Protection discrimination 135 Upstream: Compact NS100 DC Downstream: Compact NS100 DC 135 Upstream: Compact NS160 DC Downstream: Compact NS100 and NS160 DC 136 Upstream: Compact NS250 DC Downstream: Compact NS100 and NS250 DC 137 Upstream: Compact NS400-NS630 DC Downstream: Compact NS100 to NS630 DC 138 Upstream: Masterpact NW10 Downstream: Compact NS100 to NS630 DC, Masterpact NW Upstream: Masterpact NW10 and NW20 Downstream: Compact NS100 to NS630 DC, Masterpact NW10 and NW Upstream: Masterpact NW20 and NW40 Downstream: Compact NS100 to NS630 DC, Masterpact NW10 to NW Catalogue numbers and order form
3 Compact NS100 to NS250 0 Tripping curves TM16D for direct current use TM25D for direct current use DB DB TM32D for direct current use TM40D for direct current use DB DB
4 Compact NS100 to NS250 0 Tripping curves TM50D for direct current use TM63D for direct current use DB DB TM80DC for direct current use TM100DC for direct current use DB DB
5 Compact NS100 to NS250 0 Tripping curves TM125DC for direct current use TM160DC for direct current use DB DB TM200DC for direct current use TM250DC for direct current use DB DB
6 Compact NS400-NS630 0 Tripping curves MP1 for NS400/630DC MP2 for NS400/630DC DB DB MP3 for NS630DC DB
7 Masterpact NW10 to NW40 0 Tripping curves U = 500 V DC, L/R = 5 ms Micrologic DC 1.0 instantaneous protection With A sensors With A sensors DB DB With A sensors DB
8 Masterpact NW10 to NW40 0 Tripping curves U = 750/900 V DC, L/R = 5 ms Micrologic DC 1.0 instantaneous protection With A sensors With A sensors DB DB With A sensors DB
9 Masterpact NW10 to NW40 0 Tripping curves U = 500 V DC, L/R = 15 ms Micrologic DC 1.0 instantaneous protection With A sensors With A sensors DB DB With A sensors DB
10 Masterpact NW10 to NW40 0 Tripping curves U = 750/900 V DC, L/R = 15 ms Micrologic DC 1.0 instantaneous protection With A sensors With A sensors DB DB With A sensors DB
11 Masterpact NW10 to NW40 0 Tripping curves U = 500/750 V DC, L/R = 30 ms Micrologic DC 1.0 instantaneous protection With A sensors With A sensors DB DB With A sensors DB
12 Masterpact NW10 to NW40 0 Tripping curves U = 900 V DC, L/R = 30 ms Micrologic DC 1.0 instantaneous protection With A sensors With A sensors DB DB With A sensors DB
13 Compact NS100 to NS630 0 Current-limiting curves DB The limiting capacity of a circuit breaker is its aptitude to limit short-circuit currents. Ics = 100 % Icu The exceptional limiting capacity of the Compact NS range greatly reduces the forces created by fault currents in devices. The result is a major increase in breaking performance. In particular, the service breaking capacity Ics is equal to 100 % of Icu. The Ics value, defined by IEC standard, is guaranteed by tests comprising the following operations: b break three times consecutively a fault current equal to 100 % of Icu b check that the device continues to function normally: v it conducts the rated current without abnormal temperature rise v protection functions perform within the limits specified by the standard v suitability for isolation is not impaired. The exceptional limiting capacity of the Compact NS range is due to the rotating double-break technique (very rapid natural repulsion of contacts and the appearance of two arc voltages in-series with a very steep wave front). Longer service life of electrical installations Current-limiting circuit breakers greatly reduce the negative effects of short-circuits on installations. b Thermal effects Less temperature rise in conductors, therefore longer service life for cables. b Mechanical effects Reduced electrodynamic forces, therefore less risk of electrical contacts or bus bars being deformed or broken. b Electromagnetic effects Less disturbances for measuring devices located near electrical circuits. Current-limiting curves The current-limiting capacity of a circuit breaker is expressed by two curves which are a function of the prospective short-circuit current (the current which would flow if no protection devices were installed): b the actual peak current (limited current), b thermal stress (A 2 s), i.e. the energy dissipated by the short-circuit in a conductor with a resistance of 1 Ω. Example What is the real value of a 80 ka prospective short-circuit for L/R = 15 ms limited by an NS250 DC upstream? Answer: 18 ka peak (see next page). Maximum permissible cable stresses The table below indicates the maximum permissible thermal stresses for cables depending on their insulation, conductor (Cu or Al) and their cross-sectional area (CSA). CSA values are given in mm 2 and thermal stresses in A 2 s. S (mm²) PVC Cu Al PRC Cu Al S (mm²) PVC Cu Al PRC Cu Al Example Is a Cu/PVC cable with a CSA of 10 mm 2 adequately protected by an NS160N? The table above indicates that the permissible stress is 1.32x10 6 A 2 s. All short-circuit currents at the point where an NS160N (Icu = 35 ka) is installed are limited with a thermal stress less than 6 x 10 5 A 2 s (see next page). Cable protection is therefore ensured up to the limit of the breaking capacity of the circuit breaker. 132
14 Compact NS100 to NS630 0 Current-limiting curves for circuit breakers équipped with magnetic trip units for direct current Current-limiting curves and thermal stress for L/R = 5 ms Peak current U y 250 V CC: 1P Thermal stress DB DB Current-limiting curves and thermal stress for L/R = 15 ms Peak current U y 250 V CC: 1P Thermal stress DB DB
15 Compact NS100 to NS630 0 Protection discrimination Protection discrimination is an essential element that must be taken into account starting at the design stage of a low voltage installation to ensure the highest level of availability for users. Discrimination is important in all installations for the comfort of users, however it is fundamental in installations requiring a high level of service continuity, e.g. industrial manufacturing processes. Industrial installations without discrimination run a series of risks of varying importance including: b production deadline overruns b interruption in manufacturing, entailing: v production or finished-product losses v risk of damage to production machines in continuous processes b restarting of machines, one by one, following a general power outage b shutdown of vital safety equipment such as lubrification pumps, smoke fans, etc. DB What is discrimination? Discrimination, also called selectivity, is the coordination of automatic protection devices in such a manner that a fault appearing at a given point in a network is cleared by the protection device installed immediately upstream of the fault, and by that device alone. b total discrimination Discrimination is said to be total if, for all fault current values, from overloads up to the non-resistive short-circuit current, circuit breaker D2 opens and D1 remains closed. b partial discrimination Discrimination is partial if the above condition is not respected up to the full shortcircuit current, but only to a lesser value termed the selectivity limit current (Is). b no discrimination In the event of a fault, both circuit breakers D1 and D2 open. For DC applications, discrimination is often partial. Discrimination levels are given by the values indicated in the orange zones. 134
16 Protection discrimination 0 Upstream: Compact NS100 DC Downstream: Compact NS100 DC Upstream Compact NS100 DC - Thermal magnetic protection Type of trip unit TM16D TM25D TM32D TM40D TM50D TM63D TM80DC TM100DC Fixed or adjustable Fixed Fixed Fixed Fixed Fixed Fixed Fixed Fixed Im (A) Downstream Rating In (A) Compact NS100 DC TMD trip units TMDC trip units
17 Protection discrimination 0 Upstream: Compact NS160 DC Downstream: Compact NS100 and NS160 DC Upstream Compact NS160 DC - Thermal magnetic protection Type of trip unit TM16D TM25D TM32D TM40D TM50D TM63D TM80DC TM100DC TM125DC TM160DC Fixed or adjustable Fixed Fixed Fixed Fixed Fixed Fixed Fixed Fixed Fixed Fixed Im (A) Downstream Rating In (A) Compact NS100 DC TMD trip units TMDC trip units Compact NS160 DC TMD trip units TMDC trip units
18 Protection discrimination 0 Upstream: Compact NS250 DC Downstream: Compact NS100 and NS250 DC Upstream Compact NS250 DC - Thermal magnetic protection Type of trip unit TM80DC TM100DC TM125DC TM160DC TM200DC TM250DC Fixed or adjustable Fixed Fixed Fixed Fixed Adjustable Adjustable Min. Max. Min. Max. Im (A) Downstream Rating In (A) Compact NS100 DC TMD trip units TMDC trip units Compact NS160 DC TMD trip units TMDC trip units Compact NS250 DC TMDC trip units Irm min Irm max Irm min Irm max. 137
19 Protection discrimination 0 Upstream: Compact NS400-NS630 DC Downstream: Compact NS100 to NS630 DC Upstream NS400 DC-NS630 DC - Magnetic protection only Magnetic trip unit MP1 MP2 MP3 Adjustable Min. Max. Min. Max. Min. Max. Im (A) Downstream Rating In (A) Compact NS100 DC TMD trip units TMDC trip units Compact NS160 DC TMD trip units TMDC trip units Compact NS250 DC TMDC trip units Irm min Irm max Irm min Irm max Compact NS400 DC-NS630 DC NS630DC MP1 Irm min MP1 Irm max MP2 Irm min MP2 Irm max MP3 Irm min. MP3 Irm max. 138
20 Protection discrimination 0 Upstream: Masterpact NW10 Downstream: Compact NS100 to NS630 DC, Masterpact NW10 Upstream Masterpact NW10 magnetic protection only Magnetic trip unit 1250 A to 2500 A 2500 A to 5400 A Adjustable Setting Setting A B C D E A B C D E li (A) Downstream Rating In (A) Compact NS100 DC TMD trip units TMDC trip units Compact NS160 DC TMD trip units TMDC trip units Compact NS250 DC TMDC trip units Irm min Irm max Irm min Irm max Compact NS400 DC - NS630 DC MP1 Irm min MP1 Irm max MP2 Irm min MP2 Irm max Compact NS630 DC MP3 Irm min MP3 Irm max. Masterpact NW10 li = 1250/2500 A Masterpact NW10 li = 2500/5400 A Setting A B C D E Setting A B C D E 139
21 Protection discrimination 0 Upstream: Masterpact NW10 and NW20 Downstream: Compact NS100 to NS630 DC, Masterpact NW10 and NW20 Upstream Masterpact NW10 magnetic protection only Magnetic trip unit 5000 A to A 2500 A to 5400 A Adjustable Setting Setting A B C D E A B C D E li (A) Downstream Rating In (A) Compact NS100 DC TMD trip units TMDC trip units Compact NS160 DC TMD trip units TMDC trip units Compact NS250 DC TMDC trip units Irm min Irm max Irm min Irm max Compact NS400 DC-NS630 DC MP1 Irm min MP1 Irm max MP2 Irm min MP2 Irm max NS630 DC MP3 Irm min MP3 Irm max Masterpact NW10 li = 1250/2500 A Masterpact NW10 li = 2500/5400 A Masterpact NW10 li = 5000/11000 A Masterpact NW20 li = 2500/5400 A Setting A B C D E Setting A B C D E Setting A B C D E Setting A B C D E 140
22 Protection discrimination 0 Upstream: Masterpact NW20 and NW40 Downstream: Compact NS100 to NS630 DC, Masterpact NW10 to NW40 Upstream Masterpact NW20 magnetic protection only Magnetic trip unit 5000 A to A 5000 A to A Adjustable Setting Setting A B C D E A B C D E li (A) Downstream Rating In (A) Compact NS100 DC TMD trip units TMDC trip units Compact NS160 DC TMD trip units TMDC trip units Compact NS250 DC TMDC trip units Irm min Irm max Irm min Irm max Compact NS400 DC-NS630 DC MP1 Irm min MP1 Irm max MP2 Irm min MP2 Irm max NS630 DC MP3 Irm min MP3 Irm max Masterpact NW10 li = 1250/2500 A Masterpact NW10 li = 2500/5400 A Masterpact NW10 li = 5000/11000 A Masterpact NW20 li = 2500/5400 A Masterpact NW20 li = 5000/11000 A Masterpact NW40 li = 5000/11000 A Setting A B C D E Setting A B C D E Setting A B C D E Setting A B C D E Setting A B C D E Setting A B C D E 141
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