Littelfuse EL3100 Ground Fault and Phase Voltage Indicator User Guide

: June 16, 2024
: Littelfuse

Table of Contents

Littelfuse EL3100 Ground Fault and Phase Voltage Indicator
DESCRIPTION
FEATURES
REMOTE INDICATION
OUTPUT CONTACT
INSTALLATION
TECHNICAL SPECIFICATIONS
ORDERING INFORMATION
WARRANTY
MANUAL REVISION HISTORY
CONTACT
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Littelfuse EL3100 Ground Fault and Phase Voltage Indicator

DISCLAIMER
Specifications are subject to change without notice. Littelfuse Startco is not liable for contingent or consequential damages or expenses sustained as a result of a malfunction, incorrect application, or incorrect adjustment.

DESCRIPTION

The EL3100 is a self-powered ground-fault and phasevoltage indication system for three-phase systems. The EL3100 meets the National Electrical Code requirements for ground detectors for ungrounded alternating-current systems as defined in NEC 250.21. It also meets the Canadian
Electrical Code requirements for ungrounded alternating-current systems in accordance with CEC 10-106(2).
Voltage connections are provided on the EL3100 for 208-, 240-, 480-, and 600-V systems. Three green LEDs on the EL3100 indicate the presence of phase-to-ground voltage and one red LED indicates a ground fault. The phase LED intensity is a function of line-to-ground voltage providing a visual indication of phase balance.
There are cases when one of the three-phase indicators is off but no ground fault is indicated. This occurs on an ungrounded system when there is a phase loss. Groundfault indication is still enabled and will be activated when either of the energized phases develops a ground fault.
The EL3100 can operate stand-alone or with up to five remote LED indicators. High-intensity 16-mm IP67 LED lamps are available in red and green colours. LED indicators and wiring operate in low-voltage mode.
A solid-state relay output indicates a ground fault. The output relay is closed when the three-phase neutral voltage shifts as a result of ground leakage.

FEATURES

Direct connection to EL3100 for voltages up to 600 Vac line-to-line
Provides faulted-phase indication for resistance grounded and ungrounded systems
Provides phase-voltage indication for resistance grounded and ungrounded systems
The EL3100 can be used stand-alone or with low-voltage remote LEDs
Solid-state (100 mA, 120 Vac/Vdc) output relay
Three green phase-voltage LEDs
One red ground-fault LED
Up to five remote LEDs can be connected

REMOTE INDICATION

Terminals 10 through 15 are used for remote LED indication. High-intensity LEDs with no internal resistors are required. See Section 7 for ordering information. Fig. 2 illustrates a remote LED application where all LEDs are used.
There are five remote LED outputs for phase-voltage indication, no-ground- fault indication, and ground-fault indication. Connect optional remote LEDs to terminals DA, DB, and DC (12, 11, and 10) for phase-voltage indication. The intensity of these LEDs is proportional to phase-to-ground voltage. A ground fault or phase loss is indicated when one LED is off while the other two are on. A remote LED connected to terminal DG (13) provides no ground-fault indication. This LED is on when there is no ground fault and is off when the three-phase-neutral voltage shifts from ground potential as the result of a ground fault (or if the system is de-energized). A remote LED connected to terminal DR (14) is on when a ground fault is present and off when no ground fault is present (or the system is de-energized). Terminal DN (15) is the LED common terminal.

NOTE: Unused LED outputs must be left unconnected.

OUTPUT CONTACT

A solid-state normally open ground-fault-indication relay output is at terminals 16 and 17. The output relay is closed when the three-phase neutral shifts more than 20 Vac to ground for the “L” voltage inputs and 40 Vac for ground for the “H” voltage inputs.
NOTE: The relay output has a rating of 100 mA at 120 Vac/Vdc and has a 35-Ω closed resistance.

INSTALLATION

Outline and mounting details of the EL3100 are shown in Fig. 1. For 208- or 240-Vac systems use terminals AL (7), BL (8), and CL (9). For systems above 240 Vac and up to 600 Vac, use terminals AH (1), BH (3), and CH (5). Connect bonding terminal (G) to ground. See Fig. 2. Terminals 2, 4, and 6 are not used.
NOTE: Bonding terminal (G) must be connected to the ground for correct fault indication and to ensure that fault potential is not transferred to the display. Outline and mounting details for the remote LEDs are shown in Fig. 3. Cable length should be limited to 10 m (33 ft). The recommended cable is 22 – 18 AWG (0.33 to 0.82 mm2) wire. Use shielded cable for cable lengths exceeding 2 m (6 ft). When the shielded cable is used, connect the cable shield to terminal SH (18) at the EL3100 only.

NOTES

DIMENSIONS IN MILLIMETRES (INCHES).
MOUNTING SCREWS: M4 OR 8-32.
OVERALL HEIGHT WHEN MOUNTED ON DIN EN50022 35-mm x 7.5-mm TOP-HAT RAIL.

NOTES

USE L TERMINALS FOR SYSTEMS UP TO 240 VAC. USE H TERMINALS FOR SYSTEMS ABOVE 240 VAC UP TO 600 VAC.
USE SHIELDED 22 AWG TO 18 AWG (0.33 TO 0.82 mm2) CABLE FOR DISTANCES LONGER THAN 2 M (6 FT). USE BELDEN 3002A OR EQUIVALENT.
NOTE LED POLARITY. SEE FIG. 3.

TECHNICAL SPECIFICATIONS

EL3100

Phase Voltage

Input L ………………………….. 240 Vac line-to-line
Input H ………………………….. 600 Vac line-to-line
Input L, maximums …………. 240 Vac to ground, 0.8 mA input current
Input H, maximums ………… 600 Vac to ground, 2.0 mA input current
Internal Fuses (6) ……………. 500 mA, 600 Vac, not field serviceable
Frequency Response (3 dB) ….. 0 to 300 Hz

Trip Threshold

Input L(1) ……………………….. 20 Vac
Input H(1) ……………………….. 40 Vac
Fault Current(2) ……………….. 350 μA

Solid-State Relay Output

Configuration …………………. N.O. (Form A)
Operating Mode ……………… Non-Fail-Safe
Rating …………………………… 100 mA, 120 V, 12 W (ac or dc)
Protection ………………………. 130 V MOV
Closed Resistance …………… 35 Ω maximum
Dielectric Strength ………….. 1,500 Vac

Terminal Block Wire Sizes

Voltage Inputs(3) ……………… 20 to 12 AWG (0.5 to 2.5 mm2)
Bonding(3) ……………………… 20 to 12 AWG (0.5 to 2.5 mm2)
Relay(3) ………………………….. 20 to 12 AWG (0.5 to 2.5 mm2)
Display LED’s ……………….. 24 to 12 AWG (0.2 to 2.5 mm2)

Dielectric Strength

Input L(5) ……………………….. 1800 Vac, 1 s, 12 mA per phase
Input H(5) ……………………….. 2650 Vac, 1 s, 9 mA per phase
Shipping Weight ………………….. 0.4 kg (0.9 lb)

EL3100 Dimensions

Height …………………………… 87 mm (3.4”)
Width ……………………………. 113 mm (4.4”)
Depth ……………………………. 56 mm (2.2”)
Mounting Configurations ……… DIN Rail and Surface

Environment

Operating Temperature ……. -40 to 60°C (-40 to 140°F)
Storage Temperature ………. -55 to 80°C (-67 to 176°F)
Humidity……………………….. 85% Non-Condensing
PWB Conformal Coating ……… MIL-1-46058 qualified UL QMJU2 recognized
Certification …………………………… CSA, Canada and USA
CAN/CSA C22.2 No. 144-M91 – Ground Fault CircuitInterrupters
ANSI/UL Std 1053, 6TH Ed. – Standard for Ground Fault
Sensing and Relaying Equipment
CAN/CSA C22.2 No. 14-10 – Industrial Control Equipment
UL Std 508, 17TH Ed. – Industrial Control Equipment Australia, Regulatory Compliance Mark (RCM)

REMOTE LED’S (RK-31XX-0X)

Current ………………………………. 0.4 to 2.0 mA
Terminals(4) ………………………… 2.8 mm (0.11”) x 0.8 mm (0.03”)
Configuration ……………………… 16 mm (0.6”), panel mount, IP67
Certification …………………………… UL Recognized E317459

NOTES

Three-phase neutral-to-ground shift between terminal G (19) and source supply.
Current flowing in terminal G (19) (ground connection).
Accepts No. 8 (M4) ring terminals.
Supplied with Faston terminals for 22 – 18 AWG (0.33 to 0.82 mm2) wire.
With terminal G (19) connected to the ground. Do not remove the ground connection to terminal G (19) during dielectric testing to avoid test potential transfer to the remote display.

ORDERING INFORMATION

EL3100-00

Remote LED Part Numbers (see Fig. 4 for label details):

WARRANTY

The EL3100 Ground-Fault & Phase-Voltage Indicator is warranted to be free from defects in material and workmanship for 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 EL3100 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 to repairs required as a result of misuse, negligence, an accident, improper installation, tampering, or insufficient care.
Littelfuse Startco does not warrant products repaired or modified by non-Littelfuse Startco personnel.

APPENDIX A
EL3100 REVISION HISTORY

MANUAL RELEASE DATE| MANUAL REVISION| PRODUCT REVISION

(REVISION NUMBER ON PRODUCT LABEL)

---|---|---
February 22, 2016| 2-B-022216| 02
January 27, 2014| 2-A-012714
November 27, 2012| 1| 01
October 29, 2012| 0| 00