Industrial S33925 Neutral Current Transformer

Schneider Electric S33925 Neutral Current Transformer is an external neutral sensor plug for MasterPact NT/NW circuit breakers, enabling oversized neutral protection and earth-fault sensing in three-phase, four-wire distributions. It is rated for a 400–1600 A primary current and is field-installable for MasterPact NT frame insulated-case breakers, providing a plug-in method to monitor neutral current without inline accessories. This neutral current transformer is intended for external neutral sensing in 3-phase, 4-wire residual ground fault systems or for neutral current monitoring, and sits alongside other NT/NW sensors within Schneider Electric’s protection ecosystem, including S33576 and S33927.