SE-325 Series - Neutral-Grounding-Resistor Monitor

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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-325 Neutral-Grounding-Resistor Monitor is used on resistance-grounded systems up to 25 kV to monitor the integrity of the neutral-to-ground path and to detect ground faults. It measures current and voltage in a transformer or generator neutral-to-ground connection and continuity of the neutral-grounding resistor (NGR). The SE-325 coordinates these three measurements to detect a loose connection, corrosion, ground fault, or NGR failure, and provides one alarm or trip output contact.

Access specifications, certifications, check availability and order parts below

Catalog #Supply
Voltage
VAC
Supply
Voltage
VDC
Relay Contacts ConfigIEEE Device NumbersRelay
Contact
Operating
Weight (lbs/g)Auto Manual ResetConformally coatedFrequencyGF Trip Level AGF Trip Time sHarmonic FilteringReset TypeRF Trip
Level
V
RF Trip
Time Delay
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SE-3251201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgLatchingStandard50; 60; ASD0.5 - 4.00.1 - 2.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)5
SE-325D1201201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgLatchingStandard50; 60; ASD0.5 - 4.00.1 - 2.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)5
SE-325DN1201201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgLatchingStandard50; 60; ASD0.5 - 4.00.1 - 2.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)5
SE-325DNT1201201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgLatchingStandard50; 60; ASD0.5 - 4.00.1 - 5.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)5
SE-325DS1201201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgLatchingStandard50; 60; ASD0.5 - 4.00.1 - 2.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)20
SE-325DSN1201201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgNon-latchingStandard50; 60; ASD0.5 - 4.00.1 - 2.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)20
SE-325DSNT1201201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgNon-latchingStandard50; 60; ASD0.5 - 4.00.1 - 5.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)20
SE-325DST1201201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgStandard50; 60; ASD0.5 - 4.00.1 - 5.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)20
SE-325DT1201201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgStandard50; 60; ASD0.5 - 4.00.1 - 5.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)5
SE-325E2401 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgLatchingStandard50; 60; ASD0.5 - 4.00.1 - 2.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)5
SE-325EN2401 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgNon-latchingStandard50; 60; ASD0.5 - 4.00.1 - 2.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)5
SE-325ENT2401 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgNon-latchingStandard50; 60; ASD0.5 - 4.00.1 - 5.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)5
SE-325ES2401 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgStandard50; 60; ASD0.5 - 4.00.1 - 2.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)20
SE-325ESN2401 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgNon-latchingStandard50; 60; ASD0.5 - 4.00.1 - 2.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)20
SE-325ESNT2401 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgNon-latchingStandard50; 60; ASD0.5 - 4.00.1 - 5.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)20
SE-325EST2401 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgStandard50; 60; ASD0.5 - 4.00.1 - 5.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)20
SE-325ET2401 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgStandard50; 60; ASD0.5 - 4.00.1 - 5.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)5
SE-325N1201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgNon-latchingStandard50; 60; ASD0.5 - 4.00.1 - 2.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)5
SE-325NT1201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgNon-latchingStandard50; 60; ASD0.5 - 4.00.1 - 5.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)5
SE-325P1201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgStandard50; 60; ASD0.5 - 4.00.1 - 2.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)5
SE-325S1201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgStandard50; 60; ASD0.5 - 4.00.1 - 2.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)20
SE-325SN1201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgNon-latchingStandard50; 60; ASD0.5 - 4.00.1 - 2.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)20
SE-325SNT1201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgNon-latchingStandard50; 60; ASD0.5 - 4.00.1 - 5.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)20
SE-325ST1201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgStandard50; 60; ASD0.5 - 4.00.1 - 5.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)20
SE-325T1201 Form A (N.O.)50G - 50N - 51G - 51N - 59N - 86Fail-safe / Non Fail-safe0 KgStandard50; 60; ASD0.5 - 4.00.1 - 5.0StandardFront-panel switch/Remote Kit20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)5

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Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
SE-325S NGR MONITOR EXT RES TRIP TIME RoHS No 05/03/2021 PbFree No 05/03/2021 CoC_RoHS9_SE-325S_05-03-2021 REACH197_Declaration_(Contain)_SE-325S_05-03-2021
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