SWITCH 3VA21; 4-SPEED IN=25A; CAPABILITY SHORT?. ICU=200KA@415VAC; WITH CHALLENGE ELECTRONIC ETU850 AND INSTALLATION AND GENERATOR PROTECTION FUNCTIONS IN LSI; WITH LCD OFF, COMMUNICATION OPTION, ENERGY, CURRENT, POWER, VOLTAGE MEASUREMENT; WITH SECUR. AGAINST… IR = 10…25A, TR = 0.5??¦25S; WITH SECUR. SHORT – SHORT. ISD = 15…250A, TSD = 0.05…0.5S; WITH SECUR. SHORT – NO SENSOR. II=38…300A; WITH PROTECTION AND NEUTR.= 10…40 A; WITHOUT INSTALLED AUXILIARY TRIP FACTORY, NO INSTALLED FACTORY AUXILIARY CONTACTS; WITH FRAME CLAMPS