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. It monitors 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. This is of utmost importance—an open NER renders current-sensing earth-fault protection inoperative and could result in a false belief that the system is functioning properly. The SE-330AU earth-fault function complies with AS/NZS 2081.3:2002. For non-AS/NZS 2081 applications, see the SE-330 or SE-330HV.

The SE-330AU New Revision provides these additional features:

  • 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 v3.2 or later
  • An on-board microSD card (included) can be used for long term data logging and firmware upgrades
  • Earth-fault trip level is adjustable from 0.125 to 5A (EFCT) or 0.75 to 30A (CS30). When set to MEM, the earth-fault trip level is adjustable from 2 to 100% in 1% increments of the CT-primary rating. SE-MON330 V3.2 or later is required.
  • Dual Ethernet ports are optionally available with support for fiber and RJ45 interfaces
  • IEC 61850 protocol is optionally available
COMPUTER TO RELAY CONNECTION

Connect the SE-330AU to the network using a standard Ethernet patch cable. Use of a crossover cable to connect the SE-330AU 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-330AU does not support the use of DHCP. If the SE-330AU is being set-up for first time, it is recommended to only have one SE-330AU connected to the network to prevent communication errors.

Click here to download the COMPUTER TO RELAY CONNECTION diagram.

 

Access specifications, certifications, check availability and order parts below

Catalog #Supply
Voltage
(VAC)
Supply
Voltage
(VDC)
Relay
Contacts
ApprovalsAnalog Output (mA)CommsNew Revision AvailabilityOld Revision AvailabilityIEEE Device NumbersRelay
Contact
Operating
Mode
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SE-330AU-00-0065-26585-275Two Form A, Two Form CCE, C-Tick4-20USBNowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-00-0165-26585-275One Form A, One Form B, Two Form CCE, C-Tick4-20USBNowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-01-0065-26585-275Two Form A, Two Form CCE, C-Tick4-20USB, DeviceNetNowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-01-0165-26585-275One Form A, One Form B, Two Form CCE, C-Tick4-20USB, DeviceNetNowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-02-0065-26585-275Two Form A, Two Form CCE, C-Tick4-20RS-232, ProfibusNot availableAvailable until stock depleted50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-02-0165-26585-275One Form A, One Form B, Two Form CCE, C-Tick4-20RS-232, ProfibusNot availableAvailable until stock depleted50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-03-0065-26585-275Two Form A, Two Form CCE, C-Tick4-20USB, Ethernet (Dual RJ45)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-03-0165-26585-275One Form A, One Form B, Two Form CCE, C-Tick4-20USB, Ethernet (Dual RJ45)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-04-0065-26585-275Two Form A, Two Form CCE, C-Tick4-20USB, Ethernet (RJ45 and SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-04-0165-26585-275One Form A, One Form B, Two Form CCE, C-Tick4-20USB, Ethernet (RJ45 and SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-05-0065-26585-275Two Form A, Two Form CCE, C-Tick4-20USB, Ethernet (Dual SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-05-0165-26585-275One Form A, One Form B, Two Form CCE, C-Tick4-20USB, Ethernet (Dual SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-06-0065-26585-275Two Form A, Two Form CCE, C-Tick4-20USB, IEC61850 (Dual RJ45)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-06-0165-26585-275One Form A, One Form B, Two Form CCE, C-Tick4-20USB, IEC61850 (Dual RJ45)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-07-0065-26585-275Two Form A, Two Form CCE, C-Tick4-20USB, IEC61850 (RJ45 and SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-07-0165-26585-275One Form A, One Form B, Two Form CCE, C-Tick4-20USB, IEC61850 (RJ45 and SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-08-0065-26585-275Two Form A, Two Form CCE, C-Tick4-20USB, IEC61850 (Dual SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-08-0165-26585-275One Form A, One Form B, Two Form CCE, C-Tick4-20USB, IEC61850 (Dual SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-20-0028-5236-72Two Form A, Two Form CCE, C-Tick4-20USBNowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-20-0128-5236-72One Form A, One Form B, Two Form CCE, C-Tick4-20USBNowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-21-0028-5236-72Two Form A, Two Form CCE, C-Tick4-20USB, DeviceNetNowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-21-0128-5236-72One Form A, One Form B, Two Form CCE, C-Tick4-20USB, DeviceNetNowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-22-0028-5236-72Two Form A, Two Form CCE, C-Tick4-20RS-232, ProfibusNot availableAvailable until stock depleted50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-22-0128-5236-72One Form A, One Form B, Two Form CCE, C-Tick4-20RS-232, ProfibusNot availableAvailable until stock depleted50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-23-0028-5236-72Two Form A, Two Form CCE, C-Tick4-20USB, Ethernet (Dual RJ45)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-23-0128-5236-72One Form A, One Form B, Two Form CCE, C-Tick4-20USB, Ethernet (Dual RJ45)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-24-0028-5236-72Two Form A, Two Form CCE, C-Tick4-20USB, Ethernet (RJ45 and SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-24-0128-5236-72One Form A, One Form B, Two Form CCE, C-Tick4-20USB, Ethernet (RJ45 and SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-25-0028-5236-72Two Form A, Two Form CCE, C-Tick4-20USB, Ethernet (Dual SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-25-0128-5236-72One Form A, One Form B, Two Form CCE, C-Tick4-20USB, Ethernet (Dual SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-26-0028-5236-72Two Form A, Two Form CCE, C-Tick4-20USB, IEC61850 (Dual RJ45)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-26-0128-5236-72One Form A, One Form B, Two Form CCE, C-Tick4-20USB, IEC61850 (Dual RJ45)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-27-0028-5236-72Two Form A, Two Form CCE, C-Tick4-20USB, IEC61850 (RJ45 and SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-27-0128-5236-72One Form A, One Form B, Two Form CCE, C-Tick4-20USB, IEC61850 (RJ45 and SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-28-0028-5236-72Two Form A, Two Form CCE, C-Tick4-20USB, IEC61850 (Dual SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe
SE-330AU-28-0128-5236-72One Form A, One Form B, Two Form CCE, C-Tick4-20USB, IEC61850 (Dual SC Fiber)NowNo longer available50G
50N
51G
51N
59N
86
Fail-safe

pdf icon SE-330 PCN Document

Changes to SE-330 Series Neutral-Grounding-Resistor Monitors

pdf icon SE-330AU Datasheet - New Revision

The SE-330AU is an advanced earth-fault and earthing-resistor monitoring relay for low- and medium-voltage transformers and generators. It monitors neutral current, neutral-to-earth voltage, and neutral-to-earth resistance.

pdf icon SE-330AU Datasheet - Previous Revision

The SE-330AU is an advanced earth-fault and earthing-resistor monitoring relay for low- and medium-voltage transformers and generators. It monitors neutral current, neutral-to-earth voltage, and neutral-to-earth resistance.

pdf icon SE-330AU Manual - New Revision

The SE-330AU is a microprocessor-based neutral- earthing-resistor monitor that detects NER failures and earth faults in resistance-earthed systems.

pdf icon SE-330AU Manual - Previous Revision

The SE-330AU is a microprocessor-based neutral- earthing-resistor monitor that detects NER failures and earth faults in resistance-earthed systems.

SE 330 AU DeviceNet Electronic Datasheet EDS - New Revision

SE-330 AU DeviceNet Electronic Datasheet EDS - Previous Revision

SE-330 EthernetIP Electronic Data Sheet (.eds) - New Revision

SE-330 EthernetIP Electronic Data Sheet (.eds) - Previous Revision

pdf icon SE-330 DeviceNet Manual - Previous Revision

This document describes the Anybus DeviceNet features supported by the SE-330/SE-330AU/SE-330HV.

pdf icon SE-330 EthernetIP Manual - Previous Revision

This document describes the Anybus Ethernet IT features supported by the SE-330/SE-330AU/SE-330HV.

pdf icon SE-330 Profibus Manual - Previous Revision

The Profibus-DP slave interface on the SE-330/ SE-330AU/SE330HV is used to access meter data and provide reset functions. Set points can be read but not written.

SE-MON330 v3.8 Software

This software is used to receive data from SE-330, SE-330AU, and SE-330HV Neutral-Grounding-Resistor Monitors. It will display the relay's set points as well as measured values.

pdf icon SE-MON330 Software Manual

SE-MON330 is a PC-based application designed to access set-points, measured values, and trip records from the SE-330 Neutral-Grounding-Resistor Monitor, the SE-330HV Neutral-Grounding-Resistor Monitor, and the SE-330AU Neutral-Earthing- Resistor Monitor.

ER-15Kv 3D Model

ER-25kv CAD Drawing

ER-600VC CAD Drawing

pdf icon Littelfuse Protection Relays Monitoring NGRs TN

Monitoring Neutral-Grounding Resistors—An Update...

pdf icon TN-RG01 NGR Monitoring Isolated Ground Beds

pdf icon TN-RG05 SE-330 Guideform Specification

pdf icon TN-RG07 SE-VS50010K Voltage Scaler

pdf icon TN-RG08 SE-330 Settings

pdf icon TN-RG09 Single NGR for Multiple Sources

pdf icon TN-RG11 Voltage Metering on RG Systems

pdf icon TN-RG12 Convert Ungrounded to Resistance Grounded

pdf icon TN-RG14 NGR Package Checklist

pdf icon TN-GF10_Pulsing-Ground-Fault-Systems


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