SWITCH 3VA21; 4-SPEED IN=63A; CAPABILITY SHORT?. ICU=200KA@415VAC; WITH CHALLENGE ELECTRONIC ETU350 AND INSTALLATION AND GENERATOR PROTECTION FUNCTIONS IN LSI; WITH SECUR. AGAINST… IR = 25…63A, TR = 0.5??¦17S; WITH SECUR. SHORT – SHORT. ISD = 1.5??¦10 X IR, TSD = 0??¦0.4S; WITH SECUR. SHORT – NO SENSOR. II=95??¦756A; WITH LOCK AND NEUTR.= 1XIR; OFF; WITHOUT INSTALLED AUXILIARY TRIP FACTORY, NO INSTALLED FACTORY AUXILIARY CONTACTS; WITH FRAME CLAMPS