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The circuit breaker are suitable to be used in outdoor and indoor places of zones 1 and 2, where there is explosive mixture which belongs to category II, class A¡¢B¡¢C group T1-T6 for use of making and breaking circuits infrequently as well as for use of infrequently breaking and contacting in a circuit with rated voltage 380V, 660V and rated current 250A and less than 250A.
