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Littelfuse SE-330 Manual

Neutral-grounding-resistor monitor
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3714 Kinnear Place
Saskatoon, SK
NEUTRAL-GROUNDING-RESISTOR MONITOR
Document Number: PM-1200-EN
Printed in Canada.
Canada
S7P 0A6
Ph: (306) 373-5505
SE-330 MANUAL
REVISION 10-D-112913
LITTELFUSE STARTCO
NEUTRAL-GROUNDING-RESISTOR
MONITOR
GROUND
FAULT
TRIP
DIAGNOSTIC
CALIBRATED
RELAY K1
20
10
40
8
60
POWER
6
80
4
100
2
MEM
GF TRIP LEVEL
(% CT RATING)
0.5 0.7 1.0
0.4
2.0
0.3
3.0
0.2
5.0
0.1
10.0
GF TRIP TIME (s)
RESET
Copyright  2013 Littelfuse Startco
All rights reserved.
Fx: (306) 374-2245 www.littelfuse.com/relayscontrols
SE-330
RESISTOR
FAULT
TRIP
200
170
340
130
800
100
1200
60
1700
20
2000
V TRIP LEVEL
N
Ω
Ω
(
20 K
100 K
)
S5
V x 1
V x 5
N
N
1.8 2.0 2.2
CAL
1.6
2.4
1.4
2.6
1.2
2.8
1.0
3.0
PULSE PERIOD (s)

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Summary of Contents for Littelfuse SE-330

  • Page 1 (% CT RATING) 20 K 100 K V x 1 V x 5 0.5 0.7 1.0 1.8 2.0 2.2 10.0 GF TRIP TIME (s) PULSE PERIOD (s) RESET Copyright  2013 Littelfuse Startco All rights reserved. Document Number: PM-1200-EN Printed in Canada.
  • Page 2 Page i SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 This page intentionally left blank.

  • Page 3: Table Of Contents

    Analog-Output Connections ........6 1.2 SE-330 NGR Monitoring ........1 SE-330 Connection Diagram ........7 Operation ............. 2 SE-330 Outline and Panel-Mounting Details ... 8 2.1 Settings ..............2 SE-330 Outline and Surface-Mounting Details ..9 2.1.1 GF Trip Time ..........2 SE-IP65CVR-G Weatherproof Cover Outline ..
  • Page 4 Page iii SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 This page intentionally left blank.

  • Page 5: General

    The NGR selection depends on system charging current and components required to monitor an NGR are an SE-330, a whether the system is an alarm-only or a tripping system. 20- or 100-k ER-series sensing resistor, and a current Alarm-only systems are usually restricted to system transformer (CT).

  • Page 6: Operation

    12 s and ground-fault current is less than 5% of  The IEC 61850 protocol has been added. the CT rating, the SE-330 will trip on resistor fault. If the resistor-fault circuit is tripped and the neutral voltage 2. O...

  • Page 7: Pulse-Period Adjustment

    ERIOD DJUSTMENT Pulse period is the cycle time of relay K1 when the SE-330 is configured for pulsing operation. Pulse period CALIBRATION BUTTON is adjustable from 1.0 to 3.0 seconds with a fixed duty cycle of 50%. For example, with the 1.0-s setting, relay...

  • Page 8: Relay K1 Function (S1)

    ELAY ODE AND RIP- EMORY : If the SE-330 is not calibrated and is supplied (S2) from the load side of the breaker (non-fail-safe mode), Set switch S2 to select the operating mode of trip relay calibrate within 12 seconds of power-up or it may trip and K1.

  • Page 9: Pulsing Operation

    See Section 2.8. When supply voltage is applied with switch S2 set to FAIL-SAFE, the SE-330 returns to its state prior to loss of supply voltage unless switch S3 or S4 is set to non- latching. When supply voltage is applied with switch S2 set to NON-FAIL-SAFE, SE-330 trips are reset.

  • Page 10: Analog Output

    24-Vdc supply allows the analog output to be connected as a self-powered output. Power from an shown in Fig. 4. To panel mount the SE-330, insert it external supply is required for loop-powered operation. through the panel cutout and secure it with the four See Fig.

  • Page 11: Se-330 Connection Diagram

    NOTE 14 ANALOG OUTPUT 5. SEE SECTION 3.4 FOR ISOLATED-GROUND REMOTE CONNECTION. NOTE 15 RESET RESET PGA-0520 6. RELAY CONTACTS SHOWN WITH SE-330 PULSE PULSE ENABLE DE-ENERGIZED. ENABLE USB PORT 7. OPTIONAL N.C. K4 AVAILABLE. NOTE 9 8. LOOP-POWERED CONNECTION USES TERMINALS 19 AND 20 ONLY.

  • Page 12: Se-330 Outline And Panel-Mounting Details

    F A U L T RESET FRONT VIEW SIDE VIEW REAR VIEW 92.7 (3.65) NOTES: 76.2 (0.32) (3.00) 1. DIMENSIONS IN MILLIMETRES (INCHES). R=4.8 (0.19) MAXIMUM 4.75 (0.187) DIA 4 LOCATIONS PANEL-MOUNT CUTOUT FIGURE 4. SE-330 Outline and Panel-Mounting Details.

  • Page 13: Se-330 Outline And Surface-Mounting Details

    3. ENSURE THAT RETAINERS ARE AGAINST MONITOR BODY AND TIGHTEN RETAINER SCREWS. REMOVAL 1. LOOSEN RETAINER SCREWS, SLIDE RETAINERS AWAY FROM MONITOR BODY AND TIGHTEN RETAINER SCREWS. BEZEL OUTLINE 2. PULL MONITOR FORWARD. ADAPTER PANEL OUTLINE MOUNTING DETAIL FIGURE 5. SE-330 Outline and Surface-Mounting Details.

  • Page 14: Se-Ip65Cvr-G Weatherproof Cover Outline

    Page 10 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 TO PREVENT UNAUTHORIZED ENTRY: 1. USE WIRE SEAL THROUGH HOLES IN WEATHERPROOF COVER ASSEMBLY, OR 2. SECURE WITH THE PLASTIC THREAD FORMING SCREW SUPPLIED IN KIT. TOP VIEW SHOWN HOLE FOR WITH SEAL WIRE SEAL 127.0...
  • Page 15 IS SECURELY NESTED TO THE BACK OF THE DARK GREY PVC PANEL. INSTALL O-RING INTO THE GROOVE IN THE REAR OF WEATHERPROOF WINDOW ASSEMBLY. FRONT-PANEL DETAILS NOT SHOWN. INSERT ASSEMBLY INTO PANEL AND FASTEN WITH THE HARDWARE PROVIDED WITH THE SE-330. FIGURE 7. SE-IP65CVR-G Weatherproof Cover Installation.

  • Page 16: Sensing Resistor

    ER-5KV with moisture-resistant terminal covers. Use an include wind-driven rain or snow, and condensation. ER-5WP in applications in which it might be exposed to Sensing-resistor terminal R and its connection to SE-330 moisture. The ER-15KV, ER-25KV, and ER-35KV terminal R, including interposing terminal blocks, must include moisture-resistant terminal covers.
  • Page 17 Page 13 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 GASKET 120.4 120.4 (4.74) (4.74) ENCLOSURE - TOP VIEW COVER - INSIDE VIEW (COVER REMOVED) 82.5 (3.25) (0.38) M6 OR 0.25-20 120.4 (4.74) ENCLOSURE - TOP VIEW MOUNTING DETAIL 120.4 (4.74) NOTES: 1. DIMENSIONS IN MILLIMETRES (INCHES).

  • Page 18: Se-Mre-600 Moisture-Resistant Enclosure Outline 13 10 Er-600Vc Installed In Se-Mre-600

    Page 14 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 NOTE 2 MOUNTING SCREWS 4 LOCATIONS NOTE 4 NOTE 3 E R - 6 0 0 V C SENSI NG RES I STOR 2 0 K Ω 6 0 0 V AC M A X...

  • Page 19: Er-5Kv Sensing Resistor

    Page 15 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 RATINGS: 381.0 2,500 Vac MAXIMUM VOLTAGE (15.00) 21.0 MAXIMUM CURRENT 125 mA RESISTANCE ..20 kΩ (0.83) ALTERNATE NEUTRAL CONNECTION ..

  • Page 20: Er-5Wp Sensing Resistor

    Page 16 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 RATINGS: 2,500 Vac MAXIMUM VOLTAGE 381.0 MAXIMUM CURRENT 125 mA (15.00) 21.0 RESISTANCE ..20 kΩ THERMAL ..

  • Page 21: Er-15Kv Sensing Resistor

    Page 17 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 422.0 RATINGS: (16.61) 8,400 Vac MAXIMUM VOLTAGE MAXIMUM CURRENT 84 mA RESISTANCE ..100 kΩ THERMAL C A U T I O N E R - 1 5 KV...

  • Page 22: Er-25Kv Sensing Resistor

    Page 18 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 780.0 (30.70) RATINGS: MAXIMUM VOLTAGE 14,400 Vac C A U T I O N E R - 2 5 KV CAUTION MAXIMUM CURRENT 144 mA SE NS I NG R ES I ST OR 100 K Ω...

  • Page 23: Er-35Kv Sensing Resistor

    Page 19 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 RATINGS: 22,000 Vac MAXIMUM VOLTAGE MAXIMUM CURRENT 220 mA RESISTANCE ..100 kΩ 1000.0 THERMAL 1 MINUTE ON, 22,000 Vac ..

  • Page 24: Ground-Fault Ct

    CT-primary rating. See Section 9.4. Littelfuse Startco sensitive current sensors are designed for use at low levels and respond linearly to 2% current rating. The current-sensor insulation class is of no consequence if its secondary is grounded and the conductors through its window are insulated for the system voltage.

  • Page 25: Efct-1 Sensitive Ground-Fault Current Sensor

    Page 21 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 121.0 121.0 (4.76) (4.76) 20.5 80.0 (3.15) (0.81) NOTE 2 M5 SCREWS MOUNTING DETAIL 25.0 30.0 (0.98) (1.18) EFCT-1 EARTH FA ULT CT 600 V CLASS, INSULATION CLASS A LR 53428 5.0 (0.20) Ø...

  • Page 26: Se-Cs30-70 Sensitive Ground-Fault Current Sensor

    Page 22 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 121.0 121.0 (4.76) (4.76) 20.5 80.0 (3.15) (0.81) NOTE 3 M5 SCREWS MOUNTING DETAIL 25.0 30.0 (0.98) (1.18) S E - C S 3 0 - 7 0 C U R R E N T S E N S O R LR 53428 Ø...

  • Page 27: Efct-26 And Se-Cs30-26 Sensitive Ground-Fault Current Sensors

    Page 23 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 68.0 68.0 (2.68) (2.68) 17.0 34.0 (0.67) (1.34) M4 OR 8-32 TAP M5 SCREWS MOUNTING DETAIL 25.0 26.5 (0.98) (1.04) S E - C S 3 0 - 2 6 C U R R E N T S E N S O R LR 53428 4.0 (0.16) Ø...

  • Page 28: Rk-332 Remote Indication And Reset

    Page 24 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 30.0 (1.18) RESET RESISTOR FAULT GROUND FAULT LEGEND PLATE NOTE 4 22.2 (0.87) DIA 29.9 17.3 36.6 NOTES: (1.44) (1.17) (0.68) LEGEND PLATES 1. TWO RED LED LIGHTS PILOT LIGHTS 24-120 VAC/DC, NOT POLARITY SENSITIVE.

  • Page 29: Isolated Ground Connection

    (GPR) from being transferred to remote equipment. RESISTOR NEUTRAL TERMINAL N If the G terminals on the sensing resistor and the SE-330 NOTE 1 are connected to an isolated ground, the SE-330 will be exposed to the GPR. If the GPR is greater than the...

  • Page 30: Data Interfaces

    4.1.1 D ATALOGGING  Trip records, 100 date and time stamped When a microSD™ card is installed, the SE-330 looks  Firmware version and serial number for a directory called “Datalogging”. If this directory exists, data logging will automatically start after the card...

  • Page 31: Troubleshooting

    Repeat the calibration procedure after the open or shorted condition has been corrected. GF LED : No Change, RF LED : ON, K1:Trip The SE-330 was tripped by a signal from network communications. Remote Trip DIAGNOSTIC LED flash code = L-S-S-L…* Press RESET to clear the trip. GF LED...

  • Page 32: Technical Specifications

    Page 28 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 3 dB Frequency Response: 6. T ECHNICAL PECIFICATIONS S6 = 50 Hz ......25 to 85 Hz 6.1 SE-330 S6 = 60 Hz ......30 to 90 Hz Supply: Maximum CT lead resistance: Option 0 .........

  • Page 33: Sensing Resistors

    Page 29 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 Ratings ........100 mA, 250 V (ac or dc) IP Rating ........IP30 Closed Resistance ....30 to 50  Surge Withstand ......ANSI/IEEE C37.90.1- 1989 (Oscillatory and Fast Unit Healthy Output K4 (Option 1): Transient) Configuration ......

  • Page 34: Current Sensors

    Insulation ......600-V Class Window Diameter ....26 mm (1.0”) Shipping Weight ....0.45 kg (1.0 lb) Certifications ......CSA, UL, CE CE, European Union Compliance ......RoHS, IEC 60044-1 NOTES: Electrical specifications have been verified at a Littelfuse lab.

  • Page 35: Ordering Information

    5SHT-101-E ......Current Sensor, 0 Universal ac/dc Supply 100-A-primary rating, 2 48 Vdc Supply 40-mm (1.6”) window Please refer to the SE-330 Product Change Notice 5SHT-151-E ......Current Sensor, OTE: (PCN) document for updated ordering information and new 150-A-primary rating, revision details, available at www.littelfuse.com/se-330.

  • Page 36: Warranty

    Littelfuse Startco will (at Littelfuse Startco’s option) repair, replace, or refund the original purchase price of an SE-330 that is determined by Littelfuse Startco to be defective if it is returned to Littelfuse Startco, freight prepaid, within the warranty period. This warranty does...

  • Page 37: Test Procedures

    Applying the test voltage to the R and G terminals OTE: will damage the SE-330 and the ER sensing resistor. The V TRIP LEVEL is the trip voltage at terminal N, not terminal R. Procedure:  Connect the ER sensing resistor to the SE-330 and calibrate the SE-330.

  • Page 38: Ground-Fault Performance Test

    Page 34 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 9.4 G ROUND- AULT ERFORMANCE a) USING SE-400 To meet the requirements of the National Electrical Code (NEC), as applicable, the overall ground-fault NEUTRAL protection system requires a performance test when first installed. A written record of the performance test is to...

  • Page 39: Appendix Ase-330 Revision History

    Page 35 SE-330 Neutral-Grounding-Resistor Monitor Rev. 10-D-112913 APPENDIX A SE-330 REVISION HISTORY HARDWARE REVISION MANUAL MANUAL (REVISION NUMBER FIRMWARE REVISION RELEASE DATE REVISION ON PRODUCT LABEL) 2.12 November 29, 2013 10-D-112913 2.11 2.10 October 8, 2013 10-C-100813 2.08 September 12, 2013 10-B-091213 2.07...
  • Page 40 ARDWARE EVISION Update to RTC circuit. ARDWARE EVISION Updated SE-330 platform to include USB and microSD™ interfaces, programmable trip level (MEM) feature, and ability to add future options. Real-time clock added. Added dual cable and fiber Ethernet ports. IRMWARE EVISION ISTORY 2.12...

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