Moeller IZM Series, Руководство по эксплуатации

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5 – 6 08/07 AWB1230-1407GB
5.1.7.1 Conditions for use in IT Systems
The IZM circuit-breaker fulfills the requirements for use in IT
systems with the standard IEC 60947-2 Appendix H demanded
maximum values with consideration of the following options and
safety clearances (blow-out space).
The details for the blow-out space above the control circuit plug is
based on the necessary blow-out space over the arc chute and
serves as additional information to users who want to bring their
safety clearances to the appropriate highest point of the device
(control circuit plug). The short-circuit breaking capacity shown in
the table I
IT
corresponds to the maximum demanded value in the
standard IEC 60947-2 Appendix H , to fulfill an acceptibility in the IT
systems with the respective rated operating voltage U
e
.
The circuit-breakers of type IZM1 cannot be used in 690 V IT
systems, here the option IZM...-X1000 V is generally suitable.
1) –X1000 V ist option IZM...-X1000 V for rated operating voltage Ue = 1000 V AC
2) Exception: IZM...2-(4-)A(V)800...1600, this circuit-breaker fulfills the
requirement for 690V IT networks corresonding to IEC 60947-2, Appendix H
(contrary to the details on the rating label:
)
5.1.8 Labelling of the IZM circuit-breaker
The standard IEC 60947-2 Appendix H demands the labelling of
devices that are in their existing features not suitable for IT
networks for all values of the rated operating voltage and the
corresponding types or sizes. The following symbol must be directly
behind the rated operating voltage e.g. 690 V .
The labelling for single sizes and voltages can be seen in the above
table.
Overview circuit-breaker IZM in IT systems
to IEC 60947-2 or EN 60947-2 Appendix H
Type (3/4-pole)
IZM1 IZM2 IZM3
Rated operating voltage Ue
F
440 V
– Single pole short-circuit breaking capacity I
IT
kA 23 50 50
– neccessary options – – –
– minimum required blow-out space above arc chute. mm 100 100 50
– corresponding minimum blow-out space above control circuit plug.
(fixed/withdrawable)
mm 70/40 70/40 20/0
– labelling to IEC 60947-2 Appendix H 690 V 690 V 500 V
Rated operating voltage Ue
F
500 V
– Single pole short-circuit breaking capacity IIT kA 23 50 50
– neccessary options – – –X1000 V
1)
– minimum required blow-out space above arc chute. mm 150 150 50
– corresponding minimum blow-out space above control circuit plug.
(fixed/withdrawable)
mm 120/90 120/90 65/0
– labelling to IEC 60947-2 Appendix H 690 V 690 V 1000 V
Rated operating voltage Ue
F
690 V
– Single pole short-circuit breaking capacity IIT kA – 50 50
– neccessary options – –X1000 V 2) –X1000 V 1)
– minimum required blow-out space above arc chute. mm – 50 50
– corresponding minimum blow-out space above control circuit plug.
(fixed/withdrawable)
mm – 65/0 65/0
– labelling to IEC 60947-2 Appendix H 690 V 1000 V 1000 V
IT IT IT IT IT IT
IT IT IT IT IT IT
IT IT IT IT IT IT
IT IT
IT IT