SE-325 - Littelfuse

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.

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Catalog #	Supply Voltage VAC	Supply Voltage VDC	Relay Contacts Config	IEEE Device Numbers	Relay Contact Operating	Weight (lbs/g)	Auto Manual Reset	Conformally coated	Frequency	GF Trip Level A	GF Trip Time s	Harmonic Filtering	Reset Type	RF Trip Level V	RF Trip Time Delay s

SE-325	120		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 2.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	5
SE-325D	120	120	1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 2.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	5
SE-325DN	120	120	1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 2.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	5
SE-325DNT	120	120	1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 5.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	5
SE-325DS	120	120	1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 2.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	20
SE-325DSN	120	120	1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Non-latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 2.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	20
SE-325DSNT	120	120	1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Non-latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 5.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	20
SE-325DST	120	120	1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg		Standard	50; 60; ASD	0.5 - 4.0	0.1 - 5.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	20
SE-325DT	120	120	1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg		Standard	50; 60; ASD	0.5 - 4.0	0.1 - 5.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	5
SE-325E	240		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 2.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	5
SE-325EN	240		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Non-latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 2.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	5
SE-325ENT	240		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Non-latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 5.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	5
SE-325ES	240		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg		Standard	50; 60; ASD	0.5 - 4.0	0.1 - 2.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	20
SE-325ESN	240		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Non-latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 2.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	20
SE-325ESNT	240		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Non-latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 5.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	20
SE-325EST	240		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg		Standard	50; 60; ASD	0.5 - 4.0	0.1 - 5.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	20
SE-325ET	240		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg		Standard	50; 60; ASD	0.5 - 4.0	0.1 - 5.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	5
SE-325N	120		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Non-latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 2.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	5
SE-325NT	120		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Non-latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 5.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	5
SE-325P	120		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg		Standard	50; 60; ASD	0.5 - 4.0	0.1 - 2.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	5
SE-325S	120		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg		Standard	50; 60; ASD	0.5 - 4.0	0.1 - 2.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	20
SE-325SN	120		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Non-latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 2.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	20
SE-325SNT	120		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg	Non-latching	Standard	50; 60; ASD	0.5 - 4.0	0.1 - 5.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	20
SE-325ST	120		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg		Standard	50; 60; ASD	0.5 - 4.0	0.1 - 5.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	20
SE-325T	120		1 Form A (N.O.)	50G - 50N - 51G - 51N - 59N - 86	Fail-safe / Non Fail-safe	0 Kg		Standard	50; 60; ASD	0.5 - 4.0	0.1 - 5.0	Standard	Front-panel switch/Remote Kit	20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)	5

Showing 10 items

Part #	Part Description	RoHS	Pb-free	RoHS (2015/ 863/EU) Certificate	REACH (SVHC’s) Declaration	Halogen Free	REACH (SVHC’s)	IPC-Material Declaration
SE-325S	NGR MONITOR EXT RES TRIP TIME	No 05/03/2021	No 05/03/2021					Part Number - SE-325S IPC-Material Declaration Select All X

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SE-325 Series - Neutral-Grounding-Resistor Monitor

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