Littelfuse, Inc. Relays, Contactors & Transformers - Protection Relays - Resistance Grounding - Series: SE-330HV - SE-330HV-25-01 SE-330HV-25-01

The SE-330HV is a high-voltage neutral-grounding-resistor monitoring relay designed for applications up to 72 kV. It continuously monitors neutral current, voltage, and resistance to detect open or shorted grounding resistors and ground faults as low as 100 mA using DFT filtering to prevent false trips from harmonic noise. The relay features two programmable Form C and one programmable Form A output contacts, an 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. The unit is CSA certified, UL listed, CE compliant, and RCM approved, with a panel or surface mount design and a 5-year warranty. Physical dimensions are 213 mm high, 98 mm wide, and 132 mm deep.