Littelfuse, Inc. Relays, Contactors & Transformers - Protection Relays - Resistance Grounding - Series: SE-330HV - SE-330HV-28-00 SE-330HV-28-00

The SE-330HV is a high-voltage neutral-grounding-resistor monitor designed for applications up to 72 kV, providing continuous monitoring of neutral-to-ground resistance and detecting open or shorted grounding resistors. It features ground-fault detection down to 100 mA with DFT harmonic filtering, programmable Form A and Form C output contacts, analog 4-20 mA output, and conformal coating for environmental protection. The unit supports IEC 61850 communication via dual SC Fiber and RJ45 interfaces, and includes a mini USB port for local configuration and event logging. It is CSA certified, UL listed, CE marked, and RCM compliant. The device mounts on a panel or surface and operates with a 48 Vdc power supply. The SE-330HV-28-00 variant specifies a 48 Vdc power supply and IEC 61850 dual SC Fiber communication, consistent with the series specifications.