E4V 4000 PR121 P LSI In 4000A 3p F HR ABBThe E4V 4000 PR121 P LSI is a high quality circuit breaker designed by ABB. With a current rating of 4000A and a 3 phase configuration, this circuit breaker is perfect for industrial applications that require reliable and efficient protection against overloads and short circuits. The PR121 protection relay ensures that your electrical system is always safe and secure, giving you peace of mind knowing that your equipment is well protected. This ABB