China MCB High Making Breaking Capability Miniature Circuit Breakers

Standard
IEC/EN 60898-1
IEC/EN 60947-2
Electrical featuresRated current In
A 1, 2, 3, 4, 6, 10, 13, 16, 20, 25, 32, 40, 50,63
Poles
1P, 1P+N, 2P, 3P, 3P+N, 4P
1P, 2P, 3P, 4P
Rated voltage Ue
V 230/400~240/415Insulation voltage Ui
V500Rated frequency
50/60HzRated breaking capacity
A60006000Energy limiting class
3 Rated impulse withstand voltage(1.2/50) Uimp
V4000Dielectric test voltage at ind. Freq. for 1 min
KV21.890Pollution degree
2Power loss per pole Rated current (A)
Max power loss per pole (W)
1, 2, 3, 4, 6, 10
2 16, 20, 25, 32
3.5 40, 50, 63
5Thermo-magnetic release characteristic
B, C, D
(8-12)In
Mechanical featuresElectrical life
4000Mechanical lif
20000Contact position indicator
YESProtection degree
IP20Reference temperature for setting of thermal element
ºC
30Ambient temperature (with
daily average≤35ºC)
ºC
-5...+40Storage temperation
ºC
-25...+70InstallationTerminal connection type
Cable/U-type busbar/Pin-type busbarTerminal size top/bottom for cablemm2
25AWG
18-4Terminal size top/bottom for busbarmm2
10AWG18-8Tightening torqueN·m2.5In-Ibs.22Mounting On DIN rail EN 60715 (35mm) by means of fast clip deviceConnection From top and bottomCombination with accessoriesAuxiliary contact YESShunt release YESUnder voltage release YESAlarm contant YES

Selectivity

Load side: K NB1-63, KNB1-63H
Curve B, CIn (A)Power supply side: RT36-00 (fuse)202536506380100125160Is (kA)≤21.24>12>12>12>12>12>12>1230.71.23.85.36666640.60.92.53.86666660.50.81.92.54.5566610 0.71.42.23.23.666616 1.21.82.635.666201.52.22.54.666251.322.24.15.5632 1.71.93.84.5640 1.734550 1.52.63.54.5632.43.34.5

Load side: KNB1-63, KNB1-63H
Curve B, CIn (A)Power supply side: NM8-100S/H/R1620253240506380100Is (kA)≤100.190.190.30.40.50.50.50.630.816 0.30.40.50.50.50.630.820 0.50.50.50.630.825 0.50.50.630.8320.50.630.840 0.630.850 0.863

Backup protection

Load side:K NB1-63, KNB1-63H
Curve B, CIn (A)Power supply side: RT16 series40506380100125160Is (kA)1~6404040404040408~104040404040404013404040403535351640404040303030204040404030303025404040403030303240404040303030404040404030303050303030303030306320202020151515

Load side: KNB1-63, KNB1-63H
Curve B, CIn (A)Power supply side: NM8NM8-125SNM8-125HNM8-125RNM8-250SNM8-250HNM8-250RIs (kA)1~615181815151510~2012151512121232~4012151512121250~60121515121212

Temperature deratingThe maximum permissible current in a circuit breaker depends on the ambient temperature where the circuit breaker is
placed. Ambient temperature is the temperature inside the enclosure or switchboard in which the circuit breakers are installed.The reference temperature is 30ºC

Ambient temperature -35ºC-30ºC-20ºC-10ºC0ºC10ºC20ºC30ºC40ºC50ºC60ºC70ºCRated current(A)11.301.261.231.191.151.111.051.000.960.930.880.8322.602.522.462.382.282.202.082.001.921.861.761.6633.903.783.693.573.423.303.123.002.882.792.642.4945.205.044.924.764.564.404.164.003.843.763.523.3267.807.567.387.146.846.606.246.005.765.645.284.981013.2012.7012.5012.0011.5011.1010.6010.009.609.308.908.401621.1220.4820.0019.2018.4017.7616.9616.0015.3614.8814.2413.442026.4025.6025.0024.0023.0022.2021.2020.0019.2018.6017.8016.82533.0032.0031.2530.0028.7527.7526.5025.0024.0023.2522.2521.003242.5641.2840.0038.7237.1235.5233.9232.0030.7229.7628.1626.884053.2051.2050.0048.0046.4044.8042.4040.0038.4037.2035.6033.65067.0065.5063.0060.5058.0056.0053.0050.0048.0046.5044.0041.506383.7981.9080.0176.8673.7170.5666.7863.0060.4858.9055.4452.29

When several simultaneously operating circuit breakers are mounted side by side in a small enclosure, the temperature rise inside the enclosure causes a reduction in current rating.
You must then assign the rating (already derated if necessary according to ambient temperatuer) a downrating factor of 0.8.