Tripping unit Applications
Low setting
type B
§ Sources producing low short-circuit- current levels (standby generators)
§ Long lengths of line or cable
Standard setting
type C
§ Protection of circuits: general case
High setting
type D or K
§ Protection of circuits having high initial transient current levels (e.g. motors, transformers, resistive loads)
12 In
type MA
§ Protection of motors in association with discontactors (contactors with overload protection)
Copyrights :
http://www.electrical-installation.org/enwiki/Selection_of_a_circuit-breaker
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