Standard Electrical manufactures Controlled Response VD RCBO Building Circuit Protection. The product Controlled Response VD RCBO Building Circuit Protection is available with pulsating dc protection-Type A. Controlled Response VD RCBO Building Circuit Protection is available with Protection in case of loss of supply neutral. Range of Controlled Response VD RCBO Building Circuit Protection: 6A, 10A, 16A, 20A, 25A, 32A and 40A. Sensitivities of: 30mA, 100mA, 300mA. The salient features of the Controlled Response VD RCBO Building Circuit Protection: