ABB Group DDA 62 WL7-2 Differential Block Module

ABB Group DDA 62 WL7-2 Differential Block Module is a differential protection block in ABB’s DDA series, designed to monitor leakage currents and to trigger protective action in low-voltage switchgear when an imbalance between conductors is detected. As part of the DDA 62 family, this module is intended for integration into ABB protection schemes within modular switchgear and distribution boards. The WL7-2 designation denotes a particular enclosure/packaging variant within the DDA 62 line, aligning with ABB mounting and connection interfaces for straightforward wiring. Typical applications include industrial control panels, motor control centers, and building distribution boards where residual-current protection is required to detect earth faults and prevent insulation damage or electric shock. The DDA 62 family blocks are used to provide fast response to leakage currents and to enable coordinated tripping with other protective devices in ABB installations, contributing to safety compliance and reliable fault isolation in electrical networks.