Circuit-breakers NZM1, 2, 3, 4 up to 2000 A - Moeller Electric Parts

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Technical data
Temperature influence
Circuit-breakers, switch-disconnectors
Device Type
Release
type
Moeller HPL0211-2007/2008
http://catalog.moeller.net
Response values of the overload release at temperatures deviating from the
reference temperatures
Temperature compensation coefficient
20 °C 30 °C 40 °C 50 °C 60 °C 65 °C 70 °C
Thermomagnetic release (TM)
System protection
Protection of systems (reference temperature 40 °C)
NZM...1(-4)-A(F)15…80(-NA) TM 1.14 1.07 1 0.93 0.86 0.83 0.79
NZM...1(-4)-A(F)90…125(-NA) TM 1.14 1.07 1 0.93 0.86 0.83 0.79
NZM...1(-4)-A160 TM 1.08 1.04 1 0.96 0.92 0.90 0.88
NZM...2(-4)-A(F)15…200(-NA) TM 1.04 1.02 1 0.98 0.96 0.95 0.94
NZM...2(-4)-A(F)250(-NA) TM 1.04 1.02 1 0.98 0.96 0.95 0.94
NZM...2(-4)-A20…200 + XSV TM with XSV 1.04 1.02 1 0.98 0.96 0.95 0.94
NZM...2(-4)-A250 + XSV TM with XSV 1.04 1.02 1 0.98 0.96 0.95 0.94
Short-circuit / motor protection
Motor protection (reference temperature 20 °C)
NZM...1-M(S)40…80(-CNA) TM 1 0.98 0.95 0.93 0.90 0.89 0.88
NZM...1-M(S)100(-CNA) TM 1 0.98 0.95 0.93 0.90 0.89 0.88
NZM...2-M(S)20…200(-CNA) TM 1 0.98 0.96 0.94 0.92 0.91 0.90
NZM...2-M(S)20…200 + XSV TM with XSV 1 0.98 0.96 0.94 0.92 0.91 0.90
Notes
With temperatures which deviate from the reference temperature, a slight change of the overload protection properties occurs. In order to determine the
release time using the tripping characteristics the temperature compensation coefficient in accordance with the table must be considered.
Example:An NZM1-A100 is calibrated for a reference temperature of 40 °C.
What happens when it is operated at an ambient temperature of 60 °C ?
At 60 °C, the temperature compensation coefficient of 0.86 results in a reduced operating current of I r = 100 A x 0.86 = 86 A. In other words
at an ambient temperature of 60 °C the NZM1-A100 trips as if it were set to 86 A.
Device Type
Release
type
Reduction of the rated operational current (derating) under particular ambient
conditions (according to IEC 947)
Derating coefficient
20 °C 30 °C 40 °C 50 °C 60 °C 65 °C 70 °C
Thermomagnetic release (TM)
System protection
Protection of systems (reference temperature 40 °C)
NZM...1(-4)-A(F)15…80(-NA) TM 1 1 1 1 1 1 1
NZM...1(-4)-A(F)90…125(-NA) TM 1 1 1 1 0.86 0.83 0.8
NZM...1(-4)-A160 TM 1 1 1 0.95 0.9 0.85 0.8
NZM...2(-4)-A(F)15…200(-NA) TM 1 1 1 1 1 1 1
NZM...2(-4)-A(F)250(-NA) TM 1 1 1 1 0.9 0.85 0.8
NZM...2(-4)-A20…200 + XSV TM with XSV 1 1 1 1 1 1 1
NZM...2(-4)-A250 + XSV TM with XSV 1 0.97 0.92 0.87 0.81 – –
Short-circuit / motor protection
Motor protection (reference temperature 20 °C)
NZM...1-M(S)40…80(-CNA) TM 1 1 1 1 1 1 1
NZM...1-M(S)100(-CNA) TM 1 1 1 1 0.86 0.83 0.8
NZM...2-M(S)20…200(-CNA) TM 1 1 1 1 1 1 1
NZM...2-M(S)20…200 + XSV TM with XSV 1 1 1 1 1 1 1
Notes
The derating coefficient must be considered in accordance with the following table in order to determine the maximum permissible current loading at
different ambient temperatures.
Example:An NZM2-A250 should be operated at an ambient temperature of 65 °C.
How high is the permissible rated operational current I e ?
At 65 °C the derating coefficient is 0.85, this means I e = 250 A x 0.85 = 212.5 A.
The NZM2-A250 may be operated at an ambient temperature of 65 °C with a maximum I e = 212.5 A.
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