Electrozad

The SE-330 is an advanced ground-fault and neutral-grounding resistor monitoring relay. It measures neutral current, neutral-to ground voltage, and neutral-to-ground resistance. It provides continuous monitoring of the neutral-to-ground path to verify that the neutral-grounding resistor (NGR) is intact. This is of utmost importance-an open NGR renders current sensing ground-fault protection inoperative and could result in a false belief that the system is functioning properly. The SE-330 can be used with low- and medium-voltage transformers and generators with low- or high-resistance grounding used in processing, manufacturing, chemical, pulp and paper, petroleum, and water-treatment facilities. For high-voltage applications, use the SE-330HV. For applications that require conformance to Australian standard AS/NZS 2081.3:2002, see the SE-330AU.

Littelfuse® Resistor Monitoring Relay, Universal, Series: SE-330, 65/265 VAC, 85/275 VDC, 4/20 mA, 2 Form A/2 Form C Contact Configuration, Surface Mounting, 8.4 in H x 3.9 in W x 5.8 in D Dimensions

• 100 trip records with date and time stamp
• A mini-USB interface to view measured values, configure settings and check event records using SE-MON330 v3.0 or later
• An on-board microSD card (included) can be used for long term data logging and firmware upgrades
• Ground-fault trip level is adjustable from 2-to 100% in 10 discrete settings, and in 1% increments when using the MEM setting and SE-MON330 v3.0 or later
• Dual ethernet ports are optionally available with support for fiber and RJ45 interfaces
• IEC 61850 protocol is optionally available (release is pending)
• Connect the SE-330 to the network using a standard ethernet patch cable
• Use of a crossover cable to connect the SE-330 directly to the computer running IP config is not recommended
• A typical router will assign an IP address to all connected computers that are using DHCP
• The SE-330 does not support the use of DHCP
• If the SE-330 is being set-up for first time, it is recommended to only have one SE-330 connected to the network to prevent communication errors
• 50G, 50N, 51G, 51N, 59N and 86 IEEE devices
• Fail-safe/non fail-safe relay contact operating mode
• Advance ground-fault and neutral-grounding

• Catalog https://assets.unilogcorp.com/2/ITEM/DOC/Littelfuse_SE_330_00_00_Catalog.pdf
• Specification Sheet https://assets.unilogcorp.com/2/ITEM/DOC/IDW_DOCUMENT_442faa2a02b06fcc0796999d3c2a288fbca2b807d2b4d85f721c38533350f31b.pdf