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Summary of Contents for Littelfuse SE-330AU
- Page 1 Tel: +1-800-832-3873 E-mail: techline@littelfuse.com www.littelfuse.com/SE-330AU SE-330AU MANUAL NEUTRAL-EARTHING-RESISTOR MONITOR Revision 4-I-101817 Copyright Ó 2017 Littelfuse Startco All rights reserved. Document Number: PM-1210-EN Printed in Canada.
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Page 2: Se-330Au Neutral-Earthing-Resistor Monitor Rev. 4-I
Page i SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 This page intentionally left blank. -
Page 3: Table Of Contents
Analog-Output Connections ........4 1.2 SE-330AU NER Monitoring ......... 1 SE-330AU Connection Diagram ......7 Operation .............. 2 SE-330AU Outline and Panel-Mounting Details .. 8 2.1 Settings ..............2 SE-330AU Outline and Surface-Mounting 2.1.1 EF Trip Time ..........2 Details ..............9 2.1.2 EF Trip Level .......... - Page 4 Page iii SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 This page intentionally left blank.
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Page 5: General
The components low-resistance or solidly-earthed systems because, in required to monitor an NER are an SE-330AU, an ER-series those systems, an earth-fault flash hazard exists and an sensing resistor, and a current transformer (CT). earth fault can result in substantial point-of-fault damage. -
Page 6: Operation
2.1.3 V EVEL When the trip level is set to MEM, the earth-fault trip The SE-330AU uses a DFT algorithm to measure the setting is defined by an internal non-volatile memory fundamental component of neutral voltage (V variable. Range is 2 to 100% in 1% increments of the... -
Page 7: Sensing-Resistor Selection (S5)
The SE-330AU monitors the continuity of the CT See Section 6.1. circuit. When an open CT circuit is detected for two 2.1.7 G seconds, the SE-330AU will trip on earth fault and the AGNETIC ILTER diagnostic LED will flash the CT-Detection-Error code. -
Page 8: Trip Indication And Reset
When a trip occurs with latching operation selected, the include SD Card status and USB Error status. All other SE-330AU remains tripped until reset with the front panel diagnostic codes are considered critical. button or the remote-reset input. See Sections 2.1.4.1 and Starting with SE-330AU firmware version 2.60 and... -
Page 9: Typical Values For Tripping Systems
Page 5 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 TABLE 1. T YPICAL ALUES FOR RIPPING YSTEMS SYSTEM VOLTAGE NEUTRAL-EARTHING EARTH-FAULT TRIP LEVEL (VOLTS) RESISTOR (AMPERES) SENSING TRIP LINE TO LINE TO CURRENT RESISTANCE EFCT-X SE-CS30-X RESISTOR LEVEL (30-A LINE NEUTRAL (AMPERES) -
Page 10: Installation
Outline and panel-cutout dimensions for the SE-330AU unlikely, a minimal loss of protection will result if it does are shown in Fig. 4. To panel mount the SE-330AU, not pass through the earth-fault-CT window. See Fig. 3. insert it through the panel cutout and secure it with the : Voltage at terminal N rises to line-to-neutral voltage four included 8-32 locknuts and flat washers. -
Page 11: Se-330Au Connection Diagram
Page 7 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 3. SE-330AU Connection Diagram. -
Page 12: Se-330Au Outline And Panel-Mounting Details
Page 8 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 4. SE-330AU Outline and Panel-Mounting Details. -
Page 13: Se-330Au Outline And Surface-Mounting Details
Page 9 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 5. SE-330AU Outline and Surface-Mounting Details. -
Page 14: Se-Ip65Cvr-G Weatherproof Cover Outline
Page 10 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 6. SE-IP65CVR-G Weatherproof Cover Outline. -
Page 15: Se-Ip65Cvr-G Weatherproof Cover Installation
Page 11 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 7. SE-IP65CVR-G Weatherproof Cover Installation. -
Page 16: Er-600Vc Sensing Resistor
Page 12 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 8. ER-600VC Sensing Resistor. -
Page 17: Se-Mre-600 Moisture Resistant Enclosure
Page 13 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 9. SE-MRE-600 Moisture Resistant Enclosure. -
Page 18: Er-600Vc Installed In Se-Mre-600
Page 14 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 10. ER-600VC Installed in SE-MRE-600. -
Page 19: Er-5Kv Sensing Resistor
Page 15 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 11. ER-5KV Sensing Resistor. -
Page 20: Er-5Wp Sensing Resistor
Page 16 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 12. ER-5WP Sensing Resistor. -
Page 21: Er-15Kv Sensing Resistor
Page 17 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 13. ER-15KV Sensing Resistor. -
Page 22: Er-25Kv Sensing Resistor
Page 18 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 14. ER-25KV Sensing Resistor. -
Page 23: Er-35Kv Sensing Resistor
Page 19 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 15. ER-35KV Sensing Resistor. -
Page 24: Efct-1 Earth-Fault Current Sensor
Page 20 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 16. EFCT-1 Earth-Fault Current Sensor. -
Page 25: Se-Cs30-70 Earth-Fault Current Sensor
Page 21 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 17. SE-CS30-70 Earth-Fault Current Sensor. -
Page 26: Efct-26 And Se-Cs30-26 Earth-Fault Current Sensors
Page 22 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 18. EFCT-26 and SE-CS30-26 Earth-Fault Current Sensors. -
Page 27: Rk-332 Remote Indication And Reset
Page 23 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 FIGURE 19. RK-332 Remote Indication and Reset. FIGURE 20. PGA-0520 Analog Percent Current Meter. -
Page 28: Isolated Earth Connection
ONNECTION Isolated earthing can prevent an earth potential rise (EPR) from being transferred to remote equipment. If the G terminals on the sensing resistor and the SE-330AU are connected to isolated earth, the SE-330AU will be exposed to the EPR. -
Page 29: Data Interfaces
Do not remove and 8) – also includes Modbus TCP the SD card or power off the SE-330AU until the Refer to the appropriate SE-330 communications-interface DIAGNOSTIC LED has stopped blinking rapidly for at least 30 seconds. -
Page 30: Troubleshooting
: ON, RF LED : ON, K1:Trip CT-Detection-Error Trip 1 L - 3 S - 1 L The CT connection to the SE-330AU is open. Correct the problem DIAGNOSTIC LED flash code and press RESET. Critical diagnostic code. A/D-Converter-Error Trip 1 L - 4 S - 1 L An A/D-converter error was detected. - Page 31 : No Change, RF LED : No Change, K1:No Change DIAGNOSTIC LED = Solid Red SE-330AU processor failed to start. Cycle supply. If problem persists, consult Littelfuse Startco. K1: De-energized. Pressing RESET does not clear trips. Trip condition is still present. Locate and correct.
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Page 32: Technical Specifications
Page 28 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 6. T ECHNICAL PECIFICATIONS SE-CS30-x ......0.75, 1.5, 1.8, 2.4, 3.0, 6.0, 12.0, 18.0, 24.0, 30.0 A 6.1 SE-330AU Trip Time ....... 0.10, 0.12, 0.14, 0.16, 0.18, 0.20, 0.25, 0.30, 0.35, 0.40, Supply: 0.50 s... - Page 33 Page 29 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 Ratings ........100 mA, 250 V (ac or dc) Environment: Closed Resistance ....30 to 50 W Operating Temperature ..-40 to 60°C (-40 to 140°F) Storage Temperature ..... -55 to 80°C (-67 to 176°F) Humidity ........
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Page 34: Sensing Resistors
Page 30 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 1 MHz Burst ......IEC 61000-4-18 ER-5KV: ± 1 kV differential mode Maximum Voltage ....2,500 Vac (line-to-line) Maximum Current ....125 mA ± 2.5 kV common mode Resistance ......20 kW Thermal ......... Continuous Voltage Interruption .... -
Page 35: Current Sensors
OTE: Insulation ......600-V Class (PCN) document for updated ordering information and new Window Diameter ....82 mm (3.2”) revision details, available at www.littelfuse.com/se-330au. Shipping Weight ....0.9 kg (2.0 lb) Certifications ....... CSA, UL, CE OTE: The SE-330-SMA Surface Mount Adapter is Compliance ...... -
Page 36: Warranty
Littelfuse Startco will (at Littelfuse Startco’s option) repair, replace, or refund the original purchase price of an SE-330AU that is determined by Littelfuse Startco to be defective if it is returned to the factory, freight prepaid, within the warranty period. This warranty does not apply... -
Page 37: Test Procedures
Test Equipment: 0 to 120 Vac voltage source, multimeter, and ER sensing resistor. Use an isolation transformer if the test-voltage source does not provide dc continuity for the SE-330AU resistance-measuring circuit. : Applying the test voltage to the R and G terminals will damage the SE-330AU and the ER sensing resistor. -
Page 38: Earth-Fault Performance Test
This check can be done visually with knowledge of the circuit. connection of the current-sensor secondary to the SE-330AU is not polarity sensitive. c) Verify that the system is correctly earthed and that alternate earth paths do not exist that bypass the current sensor. -
Page 39: Appendix A Se-330Au Revision History
Page 35 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 APPENDIX A SE-330AU REVISION HISTORY HARDWARE REVISION MANUAL MANUAL (REVISION NUMBER FIRMWARE REVISION RELEASE DATE REVISION ON PRODUCT LABEL) October 18, 2017 4-I-101817 2.60 December 7, 2016 4-H-120716 2.55 2.54 September 21, 2016 4-G-092116 2.53... - Page 40 32 GB. ARDWARE EVISION RTC circuit updated. ARDWARE EVISION Updated SE-330AU platform to include USB and microSD™ interfaces, programmable Trip Level (MEM) feature, and ability to add future options. Real-time clock added. IRMWARE EVISION ISTORY 2.60...
- Page 41 Page 37 SE-330AU Neutral-Earthing-Resistor Monitor Rev. 4-I-101817 TCP Keep Alive network setting no longer resets to 5s after power cycle. 2.53 IRMWARE EVISION Fixed NAND FLASH bit error correction code to prevent solid-red diagnostic error. 2.52 IRMWARE EVISION Improved compatibility with Internet Explorer™ web browser.
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