SE-325ES - SE-325 Series

Series: SE-325
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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.

Product Literature

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NGR Set-Point Assistant

NGR-Thumb Click here to use the
NGR Set-Point Assistant

Weather-Protected Sensing Resistor

Littelfuse ER-5WP

Property (Mouseover for details) Value
Relay Contacts Config 1 Form A (N.O.)
Supply Voltage ac 240
IEEE Device Numbers 50G - 50N - 51G - 51N - 59N - 86
Relay Contacts Operation Fail-safe / Non Fail-safe
Weight (lbs/g) 0 Kg
Conformally coated Standard
Frequency 50; 60; ASD
GF Trip Level A 0.5 - 4.0
GF Trip Time s 0.1 - 2.0
Harmonic Filtering Standard
Reset Type Front-panel switch/Remote Kit
RF Trip Level V 20 - 400 (systems up to 5 kV); 100 - 2000 (systems over 5 kV)
RF Trip Time s 20
System type Resistance Grounded AC

pdf icon SE-325 Datasheet

pdf icon SE-325 Manual

pdf icon SE-325 Manual Russian

pdf icon SE-325 Manual Chinese

pdf icon SE-325 3D Model STP

pdf icon SE-325 WITH ARTWORK CAD Drawing

pdf icon Protection Relays and Controls Catalog

pdf icon Protection Relays and Controls Catalog - Spanish

pdf icon Protection Relays and Controls Catalog - Mandarin

pdf icon TN RG03 SE-325 neutral grounding resistor monitor setting

pdf icon TN RG02 application o SE-325 on alarm only systems

pdf icon TN RG04 SE-325 neutral grounding resistor monitor guideform specifications

pdf icon TN MI01 DIELECTRIC TESTS on SE-105 SE-125 SE-325 and SE-701

pdf icon TN RG06 SE-VS1002k Voltage Scaler For The SE- 325

pdf icon ER-600VC CAD Drawing

pdf icon ER-25KV CAD Drawing

pdf icon RK-325 CAD Drawing

pdf icon RK-302 CAD Drawing

pdf icon TN GF10 Pulsing Ground-Fault Systems

pdf icon TN RG07 SE-Vs50010k Voltage Scaler

pdf icon TN RG14 Neutral Grounding Resistor Checklist

pdf icon TN RG09 Multiple Sources Single Neutral Grounding Resistor

pdf icon TN RG15 Implementing Resistance Grounding on Solidly Grounded Systems

pdf icon TN RG05 SE-330 Neutral Grounding Resistor Monitor Guideform Specification

pdf icon TN RG11 Voltage Metering In Resistance Grounded Systems

pdf icon TN RG12 Implementing Resistance Grounding On Ungrounded Systems

pdf icon TN 11-1 AU Earth fault ct selection flowchart

pdf icon TN 11-1 Ground-fault ct selection flowchart

pdf icon TN 11-2 Locating phase conductors in a zero sequence ct window

pdf icon TN 11-4 Trailing cable types

pdf icon TN 11-5 Polycast 200-5 ct test

pdf icon TN 11-7 Locating phase conductors in a zero sequence ct window

pdf icon TN RG01 Monitoring with Isolated Ground Beds

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