Name: EL731 Series – Earth-Leakage, Ground-Fault Relay Series - Littelfuse EL731 Relays Provide Superior Earth-Leakage Protection
Brand: Littelfuse Inc.

EL731 Series – Earth-Leakage, Ground-Fault Relay Series - Littelfuse EL731 Relays Provide Superior Earth-Leakage Protection

Series: EL731 Series – Earth-Leakage, Ground-Fault Relay

Questions? Contact Littelfuse Support

Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The EL731 series relay operates on ac resistance-grounded systems and dc grounded systems. This unit is a microprocessor-based ac, dc, sensitive, earth-leakage relay that offers complete coverage for all frequencies from 0–6,000 Hz. Two CTs are required for the entire frequency range, or one CT can be used for only low- or high-frequency detection. An RTD/PTC temperature sensor input allows over-temperature protection. The EL731 offers metering capabilities, password-protected alarm and trip settings, and optional network communications. The EL731 is used to add low-level ground-fault protection to variable-speed drives and to dc currents.

Computer-to-Relay Connection
Connect the EL731 to the network using a standard Ethernet patch cable. Use of a crossover cable to connect the EL731 directly to the computer running IP-Config is not recommended. A typical router will assign an IP address to all connected computers that are using DHCP. The EL731 does not support the use of DHCP. If the EL731 is being set up for first time, it is recommended to only have one EL731 connected to the network to prevent communication errors.

Features

Adjustable pickup (30–5,000 mA)
Frequency range (0–90 Hz, 20–6,000 Hz)
32-character OLED display
Local LED indication
CT-loop monitoring
Analog output (4–20 mA)
Adjustable time delay
Alarm and trip settings
Temperature sensor input
Output contacts
Network communication
Harmonic filtering
Microprocessor-based
Universal power supply

Product Literature

For Technical Questions

Call +1 800-832-3873 or email us at relays@littelfuse.com

Access specifications, certifications, check availability and order parts below

Catalog #	Supply Voltage VAC	Supply Voltage VDC	Relay Contacts Config	Communications	IEEE Device Numbers	Relay Contact Operating	Dimensions	Weight (lbs/g)	Auto Manual Reset	Conformally coated	Frequency	GF Trip Level A	GF Trip Time s	Harmonic Filtering	Mounting	Stock	Samples

EL731-00-X0							1.9H X 3.8W X 5.0D				0 - 6000
EL731-01-X0				DeviceNet			1.9H X 3.8W X 5.0D				0 - 6000
EL731-02-X0				Profibus			1.9H X 3.8W X 5.0D				0 - 6000
EL731-03-X0				EtherNet IP			1.9H X 3.8W X 5.0D				0 - 6000
EL731-04-X0				Modbus TCP			1.9H X 3.8W X 5.0D				0 - 6000
EL731-10-X0							1.9H X 3.8W X 5.0D				0 - 6000
EL731-11-X0				DeviceNet			1.9H X 3.8W X 5.0D				0 - 6000
EL731-12-X0				Profibus			1.9H X 3.8W X 5.0D				0 - 6000
EL731-13-X0				EtherNet IP			1.9H X 3.8W X 5.0D				0 - 6000
EL731-14-X0				Modbus TCP			1.9H X 3.8W X 5.0D				0 - 6000
EL731-20-X0							1.9H X 3.8W X 5.0D				0 - 6000
EL731-21-X0				DeviceNet			1.9H X 3.8W X 5.0D				0 - 6000
EL731-22-X0				Profibus			1.9H X 3.8W X 5.0D				0 - 6000
EL731-23-X0				EtherNet IP			1.9H X 3.8W X 5.0D				0 - 6000
EL731-24-X0				Modbus TCP			1.9H X 3.8W X 5.0D				0 - 6000
EL731-00-00	120 / 240	120 / 240	3 Form C (N.O./N.C.)	None	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-00-10	120 / 240	120 / 240	3 Form C (N.O./N.C.)	None	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-01-00	120 / 240	120 / 240	3 Form C (N.O./N.C.)	DeviceNet	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-01-10	120 / 240	120 / 240	3 Form C (N.O./N.C.)	DeviceNet	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-02-00	120 / 240	120 / 240	3 Form C (N.O./N.C.)	Profibus	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-02-10	120 / 240	120 / 240	3 Form C (N.O./N.C.)	DeviceNet	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-03-00	120 / 240	120 / 240	3 Form C (N.O./N.C.)	EtherNet - IP	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-03-10	120 / 240	120 / 240	3 Form C (N.O./N.C.)	EtherNet - IP	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-04-00	120 / 240	120 / 240	3 Form C (N.O./N.C.)	Modbus TCP	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-04-10	120 / 240	120 / 240	3 Form C (N.O./N.C.)	Modbus TCP	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-10-00	24	48	3 Form C (N.O./N.C.)	None	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-10-10	24	48	3 Form C (N.O./N.C.)		38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-11-00	24	48	3 Form C (N.O./N.C.)	DeviceNet	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-11-10	24	48	3 Form C (N.O./N.C.)	DeviceNet	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-12-00	24	48	3 Form C (N.O./N.C.)	Profibus	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-12-10	24	48	3 Form C (N.O./N.C.)	DeviceNet	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-13-00	24	48	3 Form C (N.O./N.C.)	EtherNet - IP	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-13-10	24	48	3 Form C (N.O./N.C.)	EtherNet - IP	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-14-00	24	48	3 Form C (N.O./N.C.)	Modbus TCP	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-14-10	24	48	3 Form C (N.O./N.C.)	Modbus TCP	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-20-00		24	3 Form C (N.O./N.C.)	None	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-20-10		24	3 Form C (N.O./N.C.)		38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-21-00		24	3 Form C (N.O./N.C.)	DeviceNet	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-21-10		24	3 Form C (N.O./N.C.)	DeviceNet	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-22-00		24	3 Form C (N.O./N.C.)	Profibus	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-22-10		24	3 Form C (N.O./N.C.)	Profibus	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-23-00		24	3 Form C (N.O./N.C.)	EtherNet - IP	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-23-10		24	3 Form C (N.O./N.C.)	EtherNet - IP	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-24-00		24	3 Form C (N.O./N.C.)	Modbus TCP	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order
EL731-24-10		24	3 Form C (N.O./N.C.)	Modbus TCP	38 - 49 - 50G - 50N - 51G - 51N - 79G	Fail-safe / Non Fail-safe	1.9 H x 3.8 W x 5 D in.	0 Kg	Latching trip - Non-latching alarm	Standard	0 - 6000	0.03 - 5.00	0.05 - 2.00	Standard	DIN (optional) - Panel - Surface (optional)	Check	Order

To request product environmental information, please complete the Product Environmental Information Request Form.

	EL731 Outline Mounting Detail CAD Drawing
	Solar Product Catalog
	EL731 Manual
	EL731 Modbus TCP Interface Manual
	EL731 Spanish Manual
	EL731 Devicenet Manual
	EL731 Profibus Interface Manual
	AC700 Firmware Upgrade Manual
	TN GF03 Ground-Fault Misconceptions
	TN GF05 Ground-Fault Monitor Comparison
	TN GF10 Pulsing Ground-Fault Systems
	TN GF07 Ground-Fault Monitor Guideform Specification
	Solar Product Line Card - Mandarin
	Solar Product Line Card
	EL731 Datasheet
	Ground-Fault Protection with VFDs - Mandarin
	EL731 2D Print PDF
	EL731 3D Model STP

Showing 4 items

- AC700
  Communications Adapter Optional network-interface and firmware-upgrade communications adapter. Field...More
- Weight (lbs/g): 0 Kg
- Information Not Available
- Information Not Available
- AC700-CVR
  Watertight cover (IP66) for the EL731 in panel-mount application....More
- Information Not Available
- Information Not Available
- Information Not Available
- AC700-SMK
  DIN Rail and Surface-Mount Adapter
  Optional DIN Rail and Surface-Mount Ada...More
- Weight (lbs/g): 0 Kg
- Information Not Available
- Information Not Available
- EFCT
  Earth-Fault Current Transformer
- CT secondary current Amps: 0.05
- Weight (lbs/g): 0 Kg
- Flux Conditioner: Included, Optional

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EL731 Series – Earth-Leakage, Ground-Fault Relay Series - Littelfuse EL731 Relays Provide Superior Earth-Leakage Protection

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