Technical characteristics

Protection discrimination …Discrimination, also called selectivity, is the coordination of automaticprotection devices in such a manner that a fault appearing at a given pointin a network is cleared by the protection device installed immediatelyupstream of the fault, and by that device alone.

Discrimination is important in all installations for the comfort of users,however it is fundamental in installations requiring a high level of servicecontinuity, e.g. industrial manufacturing processes.

Cascading is a technique directly derived from current limiting. Circuitbreakers with breaking capacities less than the prospective short-circuitcurrent can be installed downstream from a current limiting circuit breakers.The breaking capacity is reinforced by the limiting capacity of the upstreamdevice.

It follows that substantial savings can be made on downstream switchgearand enclosures.

Merlin Gerin cascading tables are:■ drawn up on the basis of calculations (comparison between the energylimited by the upstream device and the maximum permissible thermal stressfor the downstream device),■ verified experimentally in accordance with IEC 60947-2 standard.

For distribution systems with 380 / 415 V, the following tables indicatecascading possibilities between upstream Multi 9 & Compact and downstreamMulti 9 circuit breakers.

Economy by means of cascading …

NS100N63 A

C60N25 A

NS250L220 A

Isc = 80 kA

Isc = 24 kA

Isc = 50 kA

Merlin Gerin, as the specialist brand of Schneider Electric inelectrical distribution, continues to innovate in the field ofprotection. The Merlin Gerin Multi 9 system now offers acompletely uniform range of miniature circuit-breakers (up to125 A).

A wide range of possible solutions, connection dependability,simple connection of auxiliaries and some innovative productsare waiting to be discovered.

In the field of protection, offering the best solutions to respondto all markets’ needs has always been a spontaneous reactionfor Merlin Gerin.

Discoverand coherent range

Multi 9 circuit-breakersup to 125 A

a completeof

The Multi 9 circuit-breakers range offers an infinite number of possiblecombinations that are simple to carry out.

■ Vigi modules assembly is simple, fast and safe to offer earth leakageprotection for persons against direct & indirect contact and for installationsagainst fire risks & insulation faults,

■ snap-on auxiliaries are adapted in a wink,

■ for all power connections, all you need is a single screwdriver whateverthe device rating,

■ total compatibility with Pragma, Disbo, Kaedra and Prisma enclosures.

… priority is simplifying installation

Throughout the years, the Merlin Gerin miniaturecircuit breakers have proved to be one of the mostreliable devices used for protection and safety:

■ it provides high performances according tointernational standards IEC 60947-2 & IEC 60898.

■ it even conforms to additional qualificationtests imposed by Schneider Electric’s qualitydepartment, considering harsh environmentalconditions (cold, heat, dust, humidity) and operatingconditions (falls, shocks, tearing out, vibrations, etc.).

… all of Merlin Gerin’s know-how in the field of protection

Upstream NS100N/H/L NS160N/H/L NS250N/H/L

Downstream Trip unit TM-D TM-D TM-D

Rating (A) 16 25 32 40 50 63 80 100 80 100 125 160 160 200 250K60N ≤10 0.19 0.3 0.4 0.5 0.5 0.5 0.63 0.8 4 5 5 5 T T TCurve C 16 0.3 0.4 0.5 0.5 0.5 0.63 0.8 4 5 5 5 T T T

20 0.4 0.5 0.5 0.5 0.63 0.8 4 5 5 5 T T T25 0.5 0.5 0.5 0.63 0.8 4 5 5 5 T T T32 0.5 0.63 0.8 4 5 5 5 T T T40 0.5 0.63 0.8 4 5 5 5 T T T

C60N ≤10 0.19 0.3 0.4 0.5 0.5 0.5 0.63 0.8 T T T T T T TCurve B-C-D 16 0.3 0.4 0.5 0.5 0.5 0.63 0.8 T T T T T T T& 20 0.4 0.5 0.5 0.5 0.63 0.8 T T T T T T TC60H 25 0.5 0.5 0.5 0.63 0.8 T T T T T T TCurve C 32 0.5 0.63 0.8 T T T T T T T

40 0.5 0.63 0.8 T T T T T T T50 0.63 0.8 T T T T T T T63 0.8 T T T T T T

C60L ≤10 0.19 0.3 0.4 0.5 0.5 0.5 0.63 0.8 T T T T T T TCurve B-C-K-Z 16 0.3 0.4 0.5 0.5 0.5 0.63 0.8 T T T T T T T

20 0.4 0.5 0.5 0.5 0.63 0.8 T T T T T T T25 0.5 0.5 0.5 0.63 0.8 T T T T T T T32 0.5 0.63 0.8 15 T T T T T T40 0.5 0.63 0.8 15 T T T T T T50 0.63 0.8 15 T T T T T T63 0.8 T T T T T T

C120N-H 80 2.5 T T TCurve B-C 100 2.5 T T T

125 T TC120N-H 80 2.5 T T TCurve D 100 T T

125 T T

Circuit breaker type K60N C60N C60H C60L C120N C120HNumber of poles 1, 2, 3, 4 1, 2, 3, 4 1, 2, 3, 4 1, 2, 3, 4 1, 2, 3, 4 1, 2, 3, 4

Electrical characteristicsRated current (A) In 6, 10 16, 20, 1, 2, 3, 6, 10, 16, 20, 1, 2, 3, 6, 10, 16, 20, 0.5, 1, 2, 3, 4, 6, 10, 16, 80, 100, 125 80, 100, 125

25, 32, 40 25, 32, 40 50, 63 25, 32, 40, 50, 63 20, 25, 32, 40, 50, 63Tripping curve C B, C, D B, C, D B, C, K, Z B, C, D B, C, DRated operational voltage (V) Ue 240 / 415 230 / 400 230 / 400 240 / 440 240 / 440 240 / 440Rated impulse withstand voltage (kV) Uimp 4 6 6 6 6 6Breaking capacity (kA rms) lcu 1P 220 / 240 V 10 15 25, 20, 15 10 15as per IEC 60947-2 2, 3, 4P 380 / 415 V 10 15 25, 20, 15 10 15

lcs % Icu 75% 50% 50% 75% 50%Utilisation category A A A A ABreaking capacity (A rms) lcn 1P 220 / 240 V 6000as per IEC 60898 2, 3, 4P 380 / 415 V 6000

lcs % Icu 100%Limitation class 3Suitability for isolation c c c c c cMechanical endurance 10000 20000 20000 20000 20000 20000

AuxiliariesVigi earth-leakage module c c c c cOF auxiliary switch c c c c cSD fault indicating auxiliary switch c c c c cMN undervoltage release c c c c cMX + OF voltage shunt release c c c c cTm remote control c c c c cDimensions (mm) for 1PW x H x D 18 x 77 x 70 18 x 81 x 70 18 x 81 x 70 18 x 81 x 70 27 x 81 x 73 27 x 81 x 73

Upstream NS100N NS100H NS100L NS160N NS160H NS160L NS250N NS250H NS250LDownstream

Breaking capacity 25 70 150 36 70 150 36 70 150 (kA rms)

K60N 6 15 20 20 20 20 20 15 20 20C60N 10 25 30 30 25 30 30 25 30 30C60H 15 25 40 40 30 40 40 30 30 30C160L ≤ 25A 25 40 40 30 40 40 30 40 40C160L ≤ 40A 20 25 40 40 30 40 40 30 40 40C160L ≤ 63A 15 25 40 40 30 40 40 30 30 30C120N/H 10 / 15 25 25 25 25 25 25 25 25 25

Upstream C60H C60L C120H EZC100N EZC100H

≤ 25 A 32 / 40 A 50 / 63 ADownstream

Breaking capacity 15 25 20 15 15 18 30 (kA rms)

C60N 10 15 25 20 15 15 15 30C60H 15 25 30C120N/H 10 / 15 15