SE-325 Littelfuse

Protection Relays and Controls Neutral-Grounding-Resistor Monitoring SE-325 SERIES (PGM-8325) Neutral-Grounding-Resistor Monitor Description 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. Features & Benefits FEATURES BENEFITS Detects resistor failure within seconds, reduces Continuous NGR transient-overvoltage risk, removes risk of ground- monitoring fault-detection failure Ground-fault Main or backup protection to detect a ground Detection fault anywhere on the monitored system Adjustable pickup Select greatest sensitivity without (0.5 - 4 A) false operation Adjustable time delay Simplified Circuit Diagram Adjustable trip delay allows system coordination (0.1 - 2 s) Output contacts Form A output contact Selectable fail-safe or non-fail-safe operating Selectable contact modes allows connection to shunt or undervoltage operating mode breaker coil or alarm system Accessories ER Series Sensing Resistor CT A Required interface between the power B system and the SE-325. Eliminates ER SERIES hazardous voltage levels at the monitor. (Sensing Resistor) SE-325 SERIES (NGR Monitor) NGR CT200 Series Current Transformer B L1 A Required CT detects ground-fault current. L2 RK Series Remote Indication and Reset Optional panel-mounted remote indication and reset assemblies. Available in NEMA 1 or NEMA 4 configurations. Ordering Information ORDERING NUMBER CONTROL POWER Specifications IEEE Device Numbers Ground Fault (50G/N, 51G/N), SE-325 120 Vac Overvoltage (59N), Lockout Relay (86), SE-325D 120 Vac/Vdc Checking Relay (3) Input Voltage See ordering information SE-325E 240 Vac D im en s i o n s H 150 mm (5.9 ) W 109 mm (4.3 ) Consult manual online for additional ordering options. D 100 mm (4.0 ) GF Trip Level Settings 0.5-4.0 A ACCESSORIES REQUIREMENT GF Trip Time Settings 0.1-2.0 s RF Trip-Level Settings 20-400 Vac (5 kV systems) CT200 Series Required 100-2,000 Vac (>5 kV systems) Contact Operating Mode Selectable fail-safe or non-fail-safe ER Series Required Reset Button Standard feature SE-MRE-600 Optional Output Contacts Form A Approvals CSA certified, UL Listed (E340889), RK-325, RK-325I, RK-302 Optional C-Tick (Australian) RK-13 Optional Conformally coated Standard feature Warranty 5 years NGRM-ENC Optional Mounting Surface 2016 Littelfuse Protection Relays & Controls Rev: 4-B-102214 Littelfuse.com/se-325 Based on Manual Rev:13-C-092314X-ON Electronics Largest Supplier of Electrical and Electronic Components Click to view similar products for I/O Modules category: Click to view products by Littelfuse manufacturer: Other Similar products are found below : 70L-IDC5S 70L-OAC-L 70Z3289-4 G21960000700 G21960002700 G34960002700 G88104401 OACU C4SWOUT PB16H G34960001700 G3TA-OA101SZ-1 DC24 G77-S G78-16-E 5607189 DA5 ODC-24A IDC5P FC6A-N16B1 6421 70MRCQ32-HL G3TAOD201SDC24 C200H-LK201-V1 G3TA-OA202SZ-US DC12 GT1-OD16 GT1-AD04CST GT1-DA04 B7AM-6BS 70GRCQ24-HS 6422 84110410 GT1-OD16MX G7VC-OC16-B7 70MRCK24-DIN 6202 6402 PI/NI-2D/24 FC6A-J2C1 FC6A-KC1C FC6A-J8CU1 GP32900003700 641-480-5022 PB16H 84145010 84110210 FRUSB1601 PCL-720+-BE FRRJ451601 AP24MX3DB25F ADAM-5053S- AE