Littelfuse, Inc. Relays, Contactors & Transformers - Protection Relays - Resistance Grounding - Series: SE-330HV - SE-330HV-05-00 SE-330HV-05-00

The SE-330HV is a high-voltage neutral-grounding-resistor monitor designed for applications up to 72 kV, continuously monitoring neutral current, neutral-to-ground voltage, and resistance to detect open or shorted grounding resistors. It provides ground-fault detection down to 100 mA using Discrete Fourier Transform filtering to prevent false trips from harmonic noise. The unit features two Form C and one Form A programmable output contacts, analog 4-20 mA output, on-board event logging, and conformal coating for environmental protection. It supports Ethernet communication via dual SC Fiber and RJ45 interfaces, and includes a mini USB port for local configuration. Mounting options include panel and surface, and it is CSA certified, UL Listed, CE compliant, and RCM marked. The device operates with a universal current transformer and requires an ER Series sensing resistor. Dimensions are 213 mm H x 98 mm W x 132 mm D.