a.20 years of experience in circuit breaker manufacturing b.10 yesrs of experience in export c ... of various the low-voltage electrical industry, such as circuit breakers(rccbs,elcbs,mcbs,rcds),Contactors,Relays & other electrical ... breaking, frequently starting & controllingthe AC motor. Combined with the auxiliary contact block, timer delay & machine-interlockingdevice etc, it becomes the delay ...