HKKM1 moulded case circuit breaker

General

It is suitable for circuitries of AC 50/60Hz, rated insulation voltage up to 800V , rated working voltage of 400/690V and rated working current up to 1250A , used for infrequent changeover as well as motor's infrequent startup (I≤630A and below) . It has protective functions against overload ,shortcircuit or under voltage , protects the circuitries and power equipment from being damage .

Key technical parameters
Model: HKKM1-63
Frame size rated current Inm (A): 63
Rated current In (A): 20
Class of rated ultimate short-circuit breaking capacity: L , M
Pole number (P): 3, 3,4
Rated ultimate short-circuit breaking capacity Icu (KA): AC400V 25 , 50
Rated service short-circuit breaking capacity Ics (KA): AC400V 18, 35
Rated operating voltage Ue (V): AC 400
Rated insulation voltage Ui (V): 500, 800
Rated impulse withstand voltage Uimp (V): 400 ,800
Flashover distance (mm): ≤ 50
Applicability: Isolation

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