Littelfuse Startco NGRM-ENC Manual
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Littelfuse Startco NGRM-ENC Manual

Enclosed neutral-grounding-resistor monitor
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Chipsmall Limited consists of a professional team with an average of over 10 year of expertise in the distribution
of electronic components. Based in Hongkong, we have already established firm and mutual-benefit business
relationships with customers from,Europe,America and south Asia,supplying obsolete and hard-to-find components
to meet their specific needs.
With the principle of "Quality Parts,Customers Priority,Honest Operation,and Considerate Service",our business
mainly focus on the distribution of electronic components. Line cards we deal with include
Microchip,ALPS,ROHM,Xilinx,Pulse,ON,Everlight and Freescale. Main products comprise
IC,Modules,Potentiometer,IC Socket,Relay,Connector.Our parts cover such applications as commercial,industrial,
and automotives areas.
We are looking forward to setting up business relationship with you and hope to provide you with the best service
and solution. Let us make a better world for our industry!
Contact us
Tel: +86-755-8981 8866 Fax: +86-755-8427 6832
Email & Skype: info@chipsmall.com Web: www.chipsmall.com
Address: A1208, Overseas Decoration Building, #122 Zhenhua RD., Futian, Shenzhen, China
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  • Page 1 Chipsmall Limited consists of a professional team with an average of over 10 year of expertise in the distribution of electronic components. Based in Hongkong, we have already established firm and mutual-benefit business relationships with customers from,Europe,America and south Asia,supplying obsolete and hard-to-find components to meet their specific needs.
  • Page 2 V x 1 V x 5 0.5 0.7 1.0 1.8 2.0 2.2 RESET 10.0 GF TRIP TIME (s) PULSE PERIOD (s) RESET PULSE PULSE ENABLE ENABLE Copyright © 2015 by Littelfuse Startco All rights reserved. Document Number: PM-1230-EN Printed in Canada.
  • Page 3 Page i NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515 This page intentionally left blank.

  • Page 4: Table Of Contents

    ABLE OF ONTENTS ISCLAIMER ECTION Specifications are subject to change without notice. Littelfuse Startco is not liable for contingent or General ..............1 consequential damages, or for expenses sustained as a 1.1 SE-325 Models ............. 1 1.2 SE-330 Models ............. 1 result of incorrect application, incorrect adjustment, or a Operation .............
  • Page 5 Page iii NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515 This page intentionally left blank.

  • Page 6: Se-325 Models

    Resistor (NGR) Monitor series is a Type 4X enclosure NGR-monitor trip state, and a green Control Power LED. housing a Littelfuse Startco SE-325 or SE-330 Neutral- Reset latched trips by pressing the Reset button when the Grounding-Resistor Monitor and optional accessories that trip condition is no longer present.

  • Page 7: Type 4X Enclosure

    EUTRAL ROUNDING are shared by the CPT connections for models so ESISTOR AND URRENT RANSFORMER equipped. For all models, connect NGRM-ENC terminal R to an ER-series sensing resistor terminal R. Follow SE-325 or 3.5 R ELAY- UTPUT ONNECTIONS SE-330 manual guidelines for wire size selection. See For external alarm or trip indication and protection, Figs.
  • Page 8 10.0 GF TRIP TIME (s) PULSE PERIOD (s) RESET PULSE ENABLE 264.0 406.2 (10.40) (16.00) SIDE FRONT NOTES: 1. DIMENSIONS IN MILLIMETRES (INCHES). 2. PANEL-MOUNTED SE-330 MODEL SHOWN. 330.5 (13.00) REAR (MOUNTING DETAIL) FIGURE 1. NGRM-ENC Outline and Mounting Details.
  • Page 9 Page 4 NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515 OPTIONAL OPTIONAL INCOMING INCOMING 120V 480V/600V BY CUSTOMER BY CUSTOMER ØA ØB ØC 0.5 A 0.5 A 0.5 A *PHASE C *PHASE B *PHASE A 600V 480V *EL3100 600/480 120/240 150 VA...
  • Page 10 Page 5 NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515 OPTIONAL OPTIONAL INCOMING INCOMING 120V 480V/600V BY CUSTOMER BY CUSTOMER ØA ØB ØC 0.5 A 0.5 A 0.5 A *PHASE C *PHASE B *PHASE A 600V 480V *EL3100 600/480 120/240 150 VA...
  • Page 11 4.DASHED LINES INDICATE FIELD WIRING. 0.5 A 600V ØC(F4) 0.5 A 600V SHLD 150 VA INTERIOR NGRM-ENC CONTROL PHASE PHASE PHASE POWER GROUND FAULT RESISTOR FAULT RESET SIDE FRONT NOTE: 1. SHOWN WITH ALL OPTIONS AVAILABLE. FIGURE 4. SE-325 Model (NGRM-ENC-100-01) Interior/Exterior Details.
  • Page 12 S E - 3 2 5 N G R M O N I T O R L(F1) 0.8 A 600V ØA(F2) 0.5 A 600V ØB(F3) 0.5 A 600V ØC(F4) 0.5 A 600V SHLD 150 VA FIGURE 5. SE-325 Model (NGRM-ENC-100-01) Interior Details.
  • Page 13 1. T1 IS SET FOR 600V INCOMING. FOR 480V SE-325(R) INCOMING, MOVE F3-TO-T1 CONNECTION FROM T1H3 TO T1H2. 2. DESIGNATORS WITH LEADING “*” ARE OPTIONAL. 3. MINIMUM SUPPLY CONDUCTOR RATING 90ºC. 4.DASHED LINES INDICATE FIELD WIRING. FIGURE 6. SE-325 Model (NGRM-ENC-XX0-XX) Wiring Label.
  • Page 14 ØC(F4) 0.5 A 600V SHLD 150 VA INTERIOR NGRM-ENC CONTROL PHASE PHASE PHASE POWER LEAKAGE GROUND CURRENT FAULT RESISTOR FAULT RESET PULSE ENABLE SIDE FRONT NOTE: 1. SHOWN WITH ALL OPTIONS AVAILABLE. FIGURE 7. SE-330 Surface-Mount Model (NGRM-ENC-XX0-21) Interior/Exterior Details.
  • Page 15 0.5 0.7 1.0 1.8 2.0 2.2 10.0 GF TRIP TIME (s) PULSE PERIOD (s) L(F1) 0.8 A 600V ØA(F2) RESET 0.5 A 600V ØB(F3) 0.5 A 600V ØC(F4) 0.5 A 600V SHLD 150 VA FIGURE 8. SE-330 Surface-Mount Model (NGRM-ENC-XX0-X1) Interior Details.
  • Page 16 SE-330(10) INCOMING, MOVE F3-TO-T1 CONNECTION SE-330(8) FROM T1H3 TO T1H2. SE-330(11) 2. DESIGNATORS WITH LEADING “*” ARE ENCLOSURE SHLD OPTIONAL. SE-330(6) 3. MINIMUM SUPPLY CONDUCTOR RATING 90ºC. 4.DASHED LINES INDICATE FIELD WIRING. FIGURE 9. SE-330 Surface-Mount Model (NGRM-ENC-XX0-XX) Wiring Label.
  • Page 17 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 PULSE ENABLE SIDE FRONT NOTE: 1. SHOWN WITH ALL OPTIONS AVAILABLE. FIGURE 10. SE-330 Panel-Mount Model (NGRM-ENC-XX1-21) Interior/Exterior Details.
  • Page 18 ENCLOSURE FROM T1H3 TO T1H2. SHLD 2. DESIGNATORS WITH LEADING “*” ARE SE-330(6) OPTIONAL. ØC(F4) 3. MINIMUM SUPPLY CONDUCTOR RATING 0.5 A 90ºC. 4.DASHED LINES INDICATE FIELD WIRING. 600V SHLD 150 VA FIGURE 11. SE-330 Panel-Mount Model (NGRM-ENC-XX1-X1) Interior Details.
  • Page 19 1. T1 IS SET FOR 600V INCOMING. FOR 480V SE-330(8) INCOMING, MOVE F3-TO-T1 CONNECTION SE-330(11) ENCLOSURE FROM T1H3 TO T1H2. SHLD 2. DESIGNATORS WITH LEADING “*” ARE SE-330(6) OPTIONAL. 3. MINIMUM SUPPLY CONDUCTOR RATING 90ºC. 4.DASHED LINES INDICATE FIELD WIRING. FIGURE 12. SE-330 Panel-Mount Model (NGRM-ENC-XX1-XX) Wiring Label.

  • Page 20: Technical Specifications

    Width ....... 465 mm (18.3”) NGRM-ENC-3XX-X0, Depth ....... 309 mm (12.2”) NGRM-ENC-5XX-X0, NGRM-ENC-7XX-X0, Shipping Weight: NGRM-ENC-9XX-X0 NGRM-ENC-XXX-XX ..13.6 kg (30 lb) maximum EL3100 ....... 2 mA, 480/600 Vac, 60 Hz, Enclosure ......... Polyester, Lockable 3-phase, 3-wire (no Ratings: neutral) SE-325 Order Options ..

  • Page 21: Ordering Information

    Option repair, replace, or refund the original purchase price of an 0 No ammeter NGRM-ENC that is determined by Littelfuse Startco to 1 Earth-leakage panel meter be defective if it is returned to the factory, freight prepaid, 2 Earth-leakage panel meter &...

  • Page 22: Appendix A Ngrm-Enc Revision History

    Page 17 NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515 APPENDIX A NGRM-ENC REVISION HISTORY MANUAL MANUAL PRODUCT REVISION RELEASE DATE REVISION (REVISION NUMBER ON PRODUCT LABEL) March 5, 2015 0-B-030515 April 25, 2014 0-A-042514 ANUAL EVISION ISTORY 0-B-030515 EVISION ECTION Added enclosure ratings.
  • Page 23 Page 18 NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515 This page intentionally left blank.

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