SE-330AU Series - Neutral-Earthing-Resistor Monitor

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The SE-330AU is an advanced earth-fault and earthing-resistor monitoring relay for low- and medium-voltage transformers and generators that is compliant with AS/NZS 2081:2011. It measures neutral current, neutral-to-earth voltage, and neutral-to-earth resistance. It provides continuous monitoring of the neutral-to-earth path to verify that the neutral-earthing resistor (NER) is intact, and also that it has not been bypassed or shorted. An open NER renders current-sensing earth-fault protection inoperative and could result in a false belief that the system is functioning properly. A shorted NER results in higher-than-expected earth-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-330AU earth-fault function complies with AS/NZS 2081:2011 Section 6, and the NER integrity monitoring function complies with AS/NZS 2081:2011 Section 8. For non-AS/NZS 2081 applications, see the SE-330 for applications up to 35 kV, or the SE-330HV for applications up to 72 kV.

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

 

Access specifications, certifications, check availability and order parts below

Catalog #Supply
Voltage
VAC
Supply
Voltage
VDC
Relay Contacts ConfigAnalog Output Current mACommunicationsNew Rev AvailOld Rev AvailIEEE Device NumbersRelay
Contact
Operating
DimensionsWeight (lbs/g)Auto Manual ResetConformally coatedFrequencyGF Trip Level ACompare
SE-330AU-00-0065 - 26585 - 2752 Form A; 2 Form C4 - 20USBNowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-00-0165 - 26585 - 2751 Form A; 1 Form B; 2 Form C4 - 20USBNowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-01-0065 - 26585 - 2752 Form A; 2 Form C4 - 20USB; DeviceNetNowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-01-0165 - 26585 - 2751 Form A; 1 Form B; 2 Form C4 - 20USB; DeviceNetNowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-03-0065 - 26585 - 2752 Form A; 2 Form C4 - 20USB; Ethernet (Dual RJ45)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-03-0165 - 26585 - 2751 Form A; 1 Form B; 2 Form C4 - 20USB; Ethernet (Dual RJ45)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-04-0065 - 26585 - 2752 Form A; 2 Form C4 - 20USB; Ethernet (RJ45 and SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-04-0165 - 26585 - 2751 Form A; 1 Form B; 2 Form C4 - 20USB; Ethernet (RJ45 and SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-05-0065 - 26585 - 2752 Form A; 2 Form C4 - 20USB; Ethernet (Dual SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-05-0165 - 26585 - 2751 Form A; 1 Form B; 2 Form C4 - 20USB; Ethernet (Dual SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-06-0065 - 26585 - 2752 Form A; 2 Form C4 - 20USB; IEC61850 (Dual RJ45)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-06-0165 - 26585 - 2751 Form A; 1 Form B; 2 Form C4 - 20USB; IEC61850 (Dual RJ45)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-07-0065 - 26585 - 2752 Form A; 2 Form C4 - 20USB; IEC61850 (RJ45 and SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-07-0165 - 26585 - 2751 Form A; 1 Form B; 2 Form C4 - 20USB; IEC61850 (RJ45 and SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-08-0065 - 26585 - 2752 Form A; 2 Form C4 - 20USB; IEC61850 (Dual SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-08-0165 - 26585 - 2751 Form A; 1 Form B; 2 Form C4 - 20USB; IEC61850 (Dual SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-20-0028 - 5236 - 722 Form A; 2 Form C4 - 20USBNowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-20-0128 - 5236 - 721 Form A; 1 Form B; 2 Form C4 - 20USBNowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-21-0028 - 5236 - 722 Form A; 2 Form C4 - 20USB; DeviceNetNowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-21-0128 - 5236 - 721 Form A; 1 Form B; 2 Form C4 - 20USB; DeviceNetNowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-23-0028 - 5236 - 722 Form A; 2 Form C4 - 20USB; Ethernet (Dual RJ45)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-23-0128 - 5236 - 721 Form A; 1 Form B; 2 Form C4 - 20USB; Ethernet (Dual RJ45)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-24-0028 - 5236 - 722 Form A; 2 Form C4 - 20USB; Ethernet (RJ45 and SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-24-0128 - 5236 - 721 Form A; 1 Form B; 2 Form C4 - 20USB; Ethernet (RJ45 and SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-25-0028 - 5236 - 722 Form A; 2 Form C4 - 20USB; Ethernet (Dual SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-25-0128 - 5236 - 721 Form A; 1 Form B; 2 Form C4 - 20USB; Ethernet (Dual SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-26-0028 - 5236 - 722 Form A; 2 Form C4 - 20USB; IEC61850 (Dual RJ45)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-26-0128 - 5236 - 721 Form A; 1 Form B; 2 Form C4 - 20USB; IEC61850 (Dual RJ45)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-27-0028 - 5236 - 722 Form A; 2 Form C4 - 20USB; IEC61850 (RJ45 and SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-27-0128 - 5236 - 721 Form A; 1 Form B; 2 Form C4 - 20USB; IEC61850 (RJ45 and SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-28-0028 - 5236 - 722 Form A; 2 Form C4 - 20USB; IEC61850 (Dual SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0
SE-330AU-28-0128 - 5236 - 721 Form A; 1 Form B; 2 Form C4 - 20USB; IEC61850 (Dual SC Fiber)NowNo longer available50G - 50N - 51G - 51N - 59N - 86Fail-safe8.4 H x 3.9 W x 5.8 D in.0 KgLatching; AutoresetStandard50; 60; ASD0.125 - 30.0

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