... batteriesB) Intelligentized central monitor ( include insulation, battery monitoring)C) High reliability, long life, maintenance-free4. System Configuration:A) Charger ... , lead-acid battery, nickel-cadmium battery, etc.C) DC feeder: DC circuit breaker (ABB, Siemens, etc).D) Central monitor: Siemens or ... monitoring devices for battery and insulation. CE Approved High Voltage DC Power Supply (DCB500)