SE-330-03-00 - SE-330 Series

Series: SE-330
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Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The SE-330 is an advanced ground-fault and neutral-grounding resistor monitoring relay that is compliant with Rule 10-302 of the 2018 Canadian Electrical Code Part I (CE Code). 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 and that it has not been bypassed or shorted. An open NGR renders current sensing ground-fault protection inoperative and could result in a false belief that the system is functioning properly. A shorted NGR results in higher-than-expected ground-fault current. A unique LED flashing code provides external confirmation for plant safety teams and inspectors when standards-compliant protection has been configured and is active.

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 applications above 35 kV, use the SE-330HV. For applications that require conformance to Australian/New Zealand standard AS/NZS 2081, use the SE-330AU.

Complete setup of the SE-330 requires connection to a PC running SE-MON330 v4.10 or higher.

For applications where existing switchgear is inaccessible or where a separate control panel is desirable, the SE-330 is also available within a NEMA 4X enclosure. The NGRM-ENC Series is available various options, including a surface-mounted or door-mounted SE-330, to fit the specific customer application.

Property (Mouseover for details) Value
Analog Output Current mA 4 - 20
Communications USB; Ethernet (Dual RJ45)
Relay Contacts Config 2 Form A; 2 Form C
Supply Voltage ac 65 - 265
Supply Voltage dc 85 - 275
New Rev Avail Now
Old Rev Avail No longer available
IEEE Device Numbers 50G - 50N - 51G - 51N - 59N - 86
Relay Contacts Operation Fail-safe / Non Fail-safe
Dimensions 8.4 H x 3.9 W x 5.8 D in.
Weight (lbs/g) 0 Kg
Auto Manual Reset Latching; Autoreset
Conformally coated Standard
Frequency 50; 60; ASD
GF Trip Level Range pct 2 - 100% of CT-Primary Rating
GF Trip Time s 0.1 - 10.0
Harmonic Filtering Standard (DFT)
Reset Type Front-panel switch/Remote N.O. Contact
RF Trip Level V 20 - 2000 (systems up to 5 kV); 100 - 10000 (systems over 5 kV)
RF Trip Time s 12
System type Resistance Grounded AC
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