Littelfuse, Inc. Relays, Contactors & Transformers - Protection Relays - Resistance Grounding - Series: SE-330HV - SE-330HV-21-01 SE-330HV-21-01

The SE-330HV is a high-voltage neutral-grounding-resistor monitoring relay designed for applications up to 72 kV, providing continuous monitoring of neutral-to-ground resistance, neutral current, and neutral-to-ground voltage to detect open or shorted resistors and ground faults as low as 100 mA. It features Discrete Fourier Transform filtering to prevent false trips from harmonic noise, programmable Form A and Form C output contacts, an analog 4-20 mA output, and a mini USB port for local communication. The unit includes an on-board microSD card for data logging, a 100-event trip recorder, and conformal coating for environmental protection. It is rated for panel or surface mounting and complies with CSA, UL, CE, and RCM standards. The device supports optional communication protocols including DeviceNet and IEC 61850, with universal compatibility for 1- and 5-A secondary current transformers. A 5-year warranty is provided.