3714 Kinnear Place Saskatoon, SK Canada S7P 0A6 Ph: (306) 373-5505 Fx: (306) 374-2245 www.littelfuse.com/relayscontrols SE-330HV MANUAL NEUTRAL-GROUNDING-RESISTOR MONITOR REVISION 5-I-091115 LITTELFUSE STARTCO NEUTRAL-GROUNDING-RESISTOR SE-330HV MONITOR RESISTOR FAULT GROUND FAULT DIAGNOSTIC TRIP TRIP CALIBRATED RELAY K1 8 6 10 20 40 60 80 4 100 2 MEM GF TRIP LEVEL (% CT RATING) 0.5 0.7 1.0 0.4 0.3 0.2 0.1 2.0 3.0 5.0 10.
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Page ii Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor TABLE OF CONTENTS SECTION LIST OF FIGURES PAGE General ................................................................. 1 1.1 Modern Resistance-Grounded Systems ................ 1 1.2 SE-330HV NGR Monitoring ................................ 1 2 Operation ............................................................. 3 2.1 Settings.................................................................. 3 2.1.1 GF Trip Time ....................
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SE-330HV Neutral-Grounding-Resistor Monitor 1. GENERAL 1.1 MODERN RESISTANCE-GROUNDED SYSTEMS A high-resistance-grounded system uses a neutralgrounding resistor (NGR) with a low let-through current to limit ground-fault current. This is an improvement over low-resistance or solidly-grounded systems because, in those systems, a ground-fault flash hazard exists and a ground fault can result in substantial pointof-fault damage.
Page 2 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor Additional features include LED trip indication, trip memory, front-panel and remote reset, 4-20-mA analog output, trip event recorder, USB local communications, microSD™ data logging, and optional network communications. The SE-330HV provides the following additional features: When the trip level is set to MEM, the ground-fault trip setting is defined by an internal non-volatile memory variable.
Page 3 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor 2. OPERATION 2.1 SETTINGS 2.1.1 GF TRIP TIME GF TRIP TIME (definite time) is adjustable from 0.1 to 10.0 seconds. Time-coordinated ground-fault protection requires this setting to be longer than the trip times of downstream ground-fault devices. A trip-time accumulator provides a ground-fault memory function for detection of intermittent faults.
SE-330HV Neutral-Grounding-Resistor Monitor S5 sets the resistor-fault trip value and the VN TRIP LEVEL range. See Section 2.1.3. 2.1.4.5 FREQUENCY (S6) Set switch S6 to 50 or 60 Hz to tune the digital filter to the line frequency of the monitored system. 2.1.4.6 UPGRADE MODE (S8) The microSD™ card is used for firmware upgrades. See Section 4.1.2 for upgrade instructions. NOTE: An upgrade causes an SE-330HV restart and this may cycle the output relays. 2.1.
SE-330HV Neutral-Grounding-Resistor Monitor shown in Fig. 18. Connect them as shown in Fig. 3. RK-332 components are not polarity sensitive. Indication relays can be set to fail-safe or non-fail-safe operation using the SE-MON330 software or network communications. The default mode is non-fail-safe. In non-fail-safe mode, relays energize on fault. Network-enabled SE-330HV’s can be remotely tripped and reset by the network master. The red DIAGNOSTIC LED indicates a network-initiated trip. See Section 2.7.
SE-330HV Neutral-Grounding-Resistor Monitor 3. INSTALLATION 3.1 SE-330HV Outline and panel-cutout dimensions for the SE-330HV are shown in Fig. 4. To panel mount the SE-330HV, insert it through the panel cutout and secure it with the four included 8-32 locknuts and flat washers. If an optional SE-IP65CVR-G Hinged Cover is used, follow the included installation instructions. See Figs. 6 and 7. All connections to the SE-330HV are made with plugin, wire-clamping terminal blocks.
Page 7 Rev.
Page 8 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor 132.0 (5.20) 16.0 (0.63) 98.3 PANEL THICKNESS 1.6 (0.06) TO 4.8 (0.19) (3.87) LITTELFUSE STARTCO NEUTRAL-GROUNDING-RESISTOR SE-330HV MONITOR RESISTOR FAULT GROUND FAULT DIAGNOSTIC TRIP 1 2 3 4 5 CALIBRATED 40 60 80 4 100 2 MEM GF TRIP LEVEL (% CT RATING) 0.5 0.7 1.0 0.4 0.3 0.2 0.1 2.0 3.0 5.0 10.
Page 9 Rev. 5-I-091115 8.0 (0.31) 6.4 RETAINER SCREW RETAINER 114.3 (4.50) 98.3 (3.87) (0.25) SE-330HV Neutral-Grounding-Resistor Monitor 138.0 (5.43) LITTELFUSE STARTCO NEUTRAL-GROUNDING-RESISTOR SE-330HV MONITOR RESISTOR FAULT GROUND FAULT DIAGNOSTIC TRIP L1 - 1 L2/N - 2 - 3 SPG - 4 SPGA - 5 RELAY K1 10 20 40 60 80 4 100 2 MEM GF TRIP LEVEL (% CT RATING) 0.5 0.7 1.
Page 10 Rev. 5-I-091115 TO PREVENT UNAUTHORIZED ENTRY: (1.34) 34.0 SE-330HV Neutral-Grounding-Resistor Monitor 1. USE WIRE SEAL THROUGH HOLES IN WEATHERPROOF COVER ASSEMBLY, OR 2. SECURE WITH THE PLASTIC THREAD FORMING SCREW SUPPLIED IN KIT. SHOWN WITH SEAL (9.84) 250.0 TOP VIEW HOLE FOR SEAL WIRE 127.0 (5.00) FRONT VIEW NOTES: 1. DIMENSIONS SHOWN IN MILLIMETRES (INCHES). 2. SHOWN WITH WEATHERPROOF SNAPS CLOSED. 3. REFER TO PANEL MOUNTING CUTOUT (FIGURE 4) FOR PANEL MOUNTING DETAIL. FIGURE 6.
Page 11 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor INSTALL O-RING INTO GROOVE IN THE REAR OF WEATHERPROOF WINDOW INSERT THE SE-330HV THROUGH OPENING OF THE WEATHERPROOF WINDOW, UNTIL IT IS SECURELY NESTED TO THE BACK OF THE DARK GREY PVC PANEL. FRONT-PANEL DETAILS NOT SHOWN. INSTALL O-RING INTO THE GROOVE IN THE REAR OF WEATHERPROOF WINDOW ASSEMBLY. INSERT ASSEMBLY INTO PANEL AND FASTEN WITH THE HARDWARE PROVIDED WITH THE SE-330HV. FIGURE 7.
Page 12 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor 422.0 RATINGS: E R - 1 5 KV 132.0 (5.20) 144.0 (5.67) (16.61) SENS IN G RESISTO R R 1 0 0 KΩ 84 0 0 V A C M A X 1 M I N UT E M A X N G MAXIMUM VOLTAGE . . 8,400 Vac MAXIMUM CURRENT . 84 mA RESISTANCE . . . . . . . . 100 kΩ THERMAL 8,400 Vac . . . . . . . . . . 1 MINUTE ON, 120 MINUTES OFF . . . . . . . . . . CONTINUOUS 1,900 Vac NOTES 2 AND 4 0.25-20 BINDING HEAD 215.0 (8.46) TOP 20.5 (0.81) TORQUE TERMINAL N . . . . . .
Page 13 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor 780.0 (30.70) 100 K Ω 1 4,4 00 V A C MA X 1 M I N UT E MA X R N 0.25-20 BINDING HEAD NOTES 2 AND 4 20.5 G (0.81) 144.0 (5.67) RATINGS: E R - 2 5 KV SE NS I NG R ES I ST OR 320.0 (12.60) TOP MAXIMUM VOLTAGE . 14,400 Vac MAXIMUM CURRENT. 144 mA RESISTANCE . . . . . . . 100 kΩ THERMAL 14,400 Vac . . . . . . . . . 1 MINUTE ON, 120 MINUTES OFF 2,500 Vac . . . . . . . . . CONTINUOUS TORQUE TERMINAL N . . . . . . . 9.
Page 14 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor 20.5 132.0 (5.20) 1000.0 (39.40) E R - 3 5 KV S E N SIN G R E SIS TO R R 10 0 K Ω 22 , 2 0 0 V AC MA X 1 M I N UT E M AX N G (0.81) RATINGS: MAXIMUM VOLTAGE . 22,000 Vac MAXIMUM CURRENT . 220 mA RESISTANCE . . . . . . . 100 kΩ THERMAL 22,000 Vac . . . . . . . . . 1 MINUTE ON, 120 MINUTES OFF 3,000 Vac . . . . . . . . . . CONTINUOUS TORQUE TERMINAL N . . . . . . . 9.0 N-m (80 in-lb) 0.25-20 BINDING HEAD NOTES 2 AND 4 459.0 (18.
Page 15 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor 1044.9 (41.14) RATINGS: E R -7 2 KV TERMINAL N 0.25-20 BINDING HEAD (7.42) 188.6 N 200 K 4 4 , 4 00 V A C M A X 1 M I N UT E M A X SENSING RESISTOR 1181.1 (46.50) MAXIMUM VOLTAGE . 44,000 Vac MAXIMUM CURRENT. 220 mA RESISTANCE . . . . . . . 200 kΩ THERMAL 44,000 Vac. . . . . . . . . 1 MINUTE ON, 120 MINUTES OFF 6,000 Vac . . . . . . . . . CONTINUOUS TORQUE TERMINAL N . . . . . . . 9.0 N-m (80 in-lb) 863.6 (34.00) 457.0 (17.
Page 16 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor 247.7 514.4 247.7 (9.75) (20.25) (9.75) (5.50) ER-72KV ORIENTED WITH TERMINAL N IN THIS LOCATION 140.0 247.7 432.0 (17.00) MINIMUM DISTANCE TO ADJACENT OBJECTS (9.75) 2286.0 (90.00) 432.0 (17.00) 247.7 432.0 (17.00) (9.75) 432.0 (17.00) 650.7 73.0 (2.88) (25.63) 365.0 (14.38) 1146.0 (45.13) 2133.6 (84.00) 1009.7 355.5 (39.75) (14.00) 775.0 (30.50) 768.4 (30.25) MINIMUM VERTICAL CLEARANCE FROM BASE: 1800.
Page 17 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor RATINGS: MAXIMUM VOLTAGE . 600 Vac MAXIMUM CURRENT. 3 mA RESISTANCE . . . . . . . 200 kΩ THERMAL . . . . . . . . . . 600 Vac CONTINUOUS 41.5 40.0 (1.63) (1.57) 10.5 19.0 10.5 (0.41) (0.75) (0.41) 8.0 22.2 (0.87) (0.31) 40.0 (1.57) NOTE 3 N 89.0 (3.50) 8.0 (0.31) 105.0 (4.13) 105.0 G (4.13) R ER-1000HV SENSI NG RES I STOR 20 0 K Ω 6 0 0 VA C M A X 4.5 (0.18) DIA C’BORE 10.0 (0.39) DIA 3.2 (0.
SE-330HV Neutral-Grounding-Resistor Monitor Page 18 Rev. 5-I-091115 NEUTRAL NGR NOTE 1 8 9 S 1 ER-1000HV SENSING RESISTOR 10 11 5 C 5A 1A EFCT R R 3 4 SPG 5 SPGA N G G 6 7 NOTES: L1 SE-330HV L2/N 1 2 L/+ SUPPLY N/- SUPPLY 1. GF TRIP SETTING IS PERCENT OF 50 mA WHEN NO CT IS USED. 2. FOR GF SETTING > 50 mA USE EFCT-x. MULTIPLE PRIMARY WRAPS MIGHT BE REQUIRED. FIGURE 14. ER-1000HV Simplified Connection Diagram. 3.
Page 19 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor NOTES: 1. DIMENSIONS IN MILLIMETRES (INCHES). 2. MOUNTING SCREWS: M4 OR 8-32. 3. PRESS MOUNTING FEET IN PLACE USING INSTALLATION TOOL PROVIDED. 4. RoHS COMPLIANT. 5. EN 60044-1 COMPLIANT. 121.0 (4.76) 121.0 (4.76) 20.5 (0.81) 56.0 (2.21) 46.0 (1.81) 30.0 (1.18) 80.0 (3.15) NOTE 2 M5 SCREWS TOP MOUNTING DETAIL 25.0 (0.98) 30.0 (1.18) EFCT-1 EARTH FA ULT CT 600 V CLASS, INSULATION CLASS A R R LR 53428 5.0 (0.
Page 20 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor 121.0 (4.76) 121.0 (4.76) 20.5 80.0 (3.15) 56.0 (2.21) 46.0 (1.81) 30.0 (1.18) (0.81) NOTE 3 M5 SCREWS TOP MOUNTING DETAIL 25.0 (0.98) (1.18) 30.0 SE-CS30-70 CURRENT SENSOR R LR 53428 R 22.0 Ø 5.0 (0.20) RECESSED FOR 8-mm HEX NUT 1.0 (0.04) DEEP 5.5 110.0 5.5 (0.22) (4.33) (0.22) 56.0 (2.21) SIDE FRONT MOUNTING FOOT INSTALLATION TOOL 126.0 69. 8 (2.7 5) NOTES: 1. DIMENSIONS IN MILLIMETRES (INCHES). 2.
Page 21 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor 68.0 (2.68) 34.0 (1.34) 68.0 (2.68) M4 OR 8-32 TAP 26.5 (1.04) 52.5 (2.07) 42.6 (1.68) 17.0 (0.67) MOUNTING DETAIL TOP (0.43) 110.0 MAX M5 SCREWS 25.0 (0.98) 26.5 (1.04) SE-CS30-26 CURRENT SENSOR R R LR 53428 US 4.0 (0.16) Ø 0 . 26 RECESSED FOR 7-mm HEX NUT 3.0 (0.12) DEEP 2) 7.0 .0 (1 58.0 (2.28) (0.87) 34.0 (1.34) 72.0 (2.83) C 5.0 (0.20) 5.0 (0.20) 52.5 (2.07) FRONT SIDE NOTES: 1.
Page 22 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor 30.0 (1.18) RESISTOR FAULT 17.3 (0.68) 29.9 (1.17) 36.6 (1.44) NOTE 4 22.2 (0.87) DIA NOTES: LEGEND PLATES 1. TWO RED LED LIGHTS 24-120 VAC/DC, NOT POLARITY SENSITIVE. 30.0 MINIMUM (1.18) 29.9 (1.17) MOUNTING DETAIL PUSH BUTTON 2. YELLOW PUSH BUTTON 3 A @ 240 VAC - A600, 0.5 A @ 125 VDC - Q600. (1.57) 40.0 MINIMUM 43.5 36.6 (1.44) (1.71) PILOT LIGHTS 14.9 (0.59) GROUND FAULT LEGEND PLATE (0.59) X1 X2 22.5 (0.89) 15.
SE-330HV Neutral-Grounding-Resistor Monitor 3.4 ISOLATED GROUND CONNECTION An isolated ground bed can prevent a ground potential rise (GPR) from being transferred to remote equipment. If the G terminals on the sensing resistor and the SE-330HV are connected to an isolated ground, the SE-330HV will be exposed to the GPR. If the GPR is greater than the terminal-block rating, the SE-330HV must be isolated from station ground and precautions must be taken with the power supply and the trip contacts.
SE-330HV Neutral-Grounding-Resistor Monitor 4. DATA INTERFACES 4.1 SD CARD The SE-330HV supports microSD™ data storage. The microSD™ card port is located on the front panel just below the USB port. The microSD™ card is used for long-term data logging of measured values and for firmware upgrades. 4.1.1 DATALOGGING When a microSD™ card is installed, the SE-330HV looks for a directory called “Datalogging”.
Page 25 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor 5. TROUBLESHOOTING PROBLEM DIAGNOSTIC LED FLASH CODE(1) POWER LED off. POWER LED flashes.
SE-330HV Neutral-Grounding-Resistor Monitor PROBLEM No analog-output current. DIAGNOSTIC LED FLASH CODE(1) Page 26 Rev. 5-I-091115 SOLUTION The output at terminals 19 and 20 requires a voltage source. See Fig. 2 for analog-output connections. See Section 9.3 for the analog-output tests. NOTES: (1) L = long pause, S = short flash. (2) When LED is on, corresponding indication relay is energized when in the non-fail-safe mode or de-energized when in the fail-safe mode.
SE-330HV Neutral-Grounding-Resistor Monitor 6. TECHNICAL SPECIFICATIONS 6.1 SE-330HV Supply: Option 0 ................................ 30 VA, 120 to 240 Vac (+10, -45%) 50/60 Hz, 20 W, 110 to 250 Vdc (+10, -25%) Option 2 ................................ 20 W, 48 Vdc (+50, -25%), 35 VA, 48 Vac (+10, -45%) 50/60 Hz Power-Up Time ........................ 3 s at 120 Vac AC Measurements .................... Discrete Fourier Transform.
SE-330HV Neutral-Grounding-Resistor Monitor ac ......................................2,000 VA resistive, 1,500 VA inductive (PF = 0.4) Subject to maximums of 8 A at 250 Vac, 8 A resistive at 30 Vdc, and 0.4 A resistive at 150 Vdc. Unit Healthy Output K4 (Option 0): Configuration.........................N.O. (Form A) Operating Mode.....................Closed when Healthy Ratings ...................................100 mA, 250 V (ac or dc) Closed Resistance..................
SE-330HV Neutral-Grounding-Resistor Monitor Power Frequency(4) ............. IEC 61000-4-16 Zone A: differential mode 100 Vrms Zone A: common mode 300 Vrms 1 MHz Burst ....................... IEC 61000-4-18 ± 1 kV differential mode (line-to-line) ± 2.5 kV common mode Voltage Interruption ........... IEC 61000-4-11, IEC 61000-4-29 0% for 10, 20, 30, 50 ms (dc) 0% for 0.5, 1, 2.5, 5 cycles (60 Hz) IEC 61000-4-17 Level 4, 15% of rated dc value Certification .................................
SE-330HV Neutral-Grounding-Resistor Monitor ER-1000HV: Maximum Voltage .............. 600 Vac Maximum Current .............. 3 mA Resistance ........................... 200 k Thermal ..................................600 Vac Continuous Shipping Weight....................300 g (0.7 lb) Certification.............................. CSA, Canada and USA R C LR 53428 US UL Listed CE, European Union NOTES: (1) Electrical specifications have been verified at a Littelfuse lab. 6.
SE-330HV Neutral-Grounding-Resistor Monitor 7. ORDERING INFORMATION SE-330HV- - K4 Contact: 0 N.O. UNIT HEALTHY Contact 1 N.C.
SE-330HV Neutral-Grounding-Resistor Monitor 8. WARRANTY The SE-330HV Neutral-Grounding-Resistor Monitor is warranted to be free from defects in material and workmanship for a period of five years from the date of purchase. Littelfuse Startco will (at Littelfuse Startco’s option) repair, replace, or refund the original purchase price of an SE-330HV that is determined by Littelfuse Startco to be defective if it is returned to the factory, freight prepaid, within the warranty period.
Page 33 Rev. 5-I-091115 SE-330HV Neutral-Grounding-Resistor Monitor 9.4 GROUND-FAULT PERFORMANCE TEST To meet the requirements of the National Electrical Code (NEC), as applicable, the overall ground-fault protection system requires a performance test when first installed. A written record of the performance test is to be retained by those in charge of the electrical installation in order to make it available to the authority having jurisdiction.
SE-330HV Neutral-Grounding-Resistor Monitor MANUAL RELEASE DATE APPENDIX A SE-330HV REVISION HISTORY HARDWARE REVISION MANUAL (REVISION NUMBER REVISION ON PRODUCT LABEL) September 11, 2015 5-I-091115 June 22, 2015 5-H-062215 May 20, 2015 5-G-052015 March 3, 2015 5-F-030315 July 8, 2014 5-E-070814 April 14, 2014 5-D-041414 Page 34 Rev. 5-I-091115 FIRMWARE REVISION 2.52 15 2.50 2.40 14 2.31 2.30 13 12 2.20 January 9, 2014 5-C-010914 November 29, 2013 5-B-112913 10A 2.
SE-330HV Neutral-Grounding-Resistor Monitor Page 35 Rev. 5-I-091115 REVISION 5-B-112913 SECTION 6 CE added to sensing resistors. SECTION 7 Ordering information updated. REVISION 5-A-100813 SECTION 1 Faceplate updated. New features added. SECTION 2 Communications options updated. Configuration switches updated. Indication relays explanation added. Non-volatile-memory error added. SECTION 3 Connection drawing updated. SECTION 4 Section heading changed to Data Interfaces.
SE-330HV Neutral-Grounding-Resistor Monitor Page 36 Rev. 5-I-091115 FIRMWARE REVISION 2.50 Added support for adjustable resistor-fault trip level. Web page functionality re-enabled for Ethernet options. FIRMWARE REVISION 2.40 Added support for geo-magnetic filter. Added support for 12 to 60 s resistor-fault trip time. Improved log file descriptions. IEC 61850 GOOSE network input support now always enabled. Improved compatibility for Modbus TCP. Web page disabled for Ethernet options.
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