Residual current block Vigi NG125, 4P, 125A, 300m-1000mA, Type A. Product or component type: Earth fault auxiliary block - Device short name: Vigi NG125 - Poles description: 4P - Network type: AC - Network frequency: 50/60 Hz - Earth fault sensitivity: 1000 mA, 300 mA, 500 mA - Earth fault protection time delay: Adjustable: instantaneous/selective - Earth fault protection class: Class A.