Manufacturing Industrial Electronic Solutions Since 1988
SYCON
Electrical Safety

Earth Leakage Relay 772X

Earth Leakage Relay with digital earth leakage current display, healthy and fault indication, variable current and trip time settings, and external CBCT sensing.

SYCON 772X Earth Leakage Relay
Product Overview

Earth Leakage Monitoring with Current Display

The SYCON 772X Earth Leakage Relay continuously monitors earth leakage current using an externally mounted CBCT (Core Balance Current Transformer). Current-carrying cables from single-phase or three-phase supplies are passed through the CBCT. The relay detects the level of earth leakage current and trips the connected system at the set current and after the set time. The 772X also provides healthy and fault indication and displays the earth leakage current.

Features

Designed for Reliable Industrial Operation

Key features of the SYCON 772X.

Solid-state design

Wide operating current range

Low power consumption

Variable current and time setting

Site-settable current and time

Reset facility

Test mode facility

Healthy and fault indication

Earth leakage current display

External CBCT sensing

Suitable for compliance to IE Rule 61-A

Benefits

Engineering Benefits
That Matter

Designed to support dependable operation and efficient electrical system performance.

01

Provides continuous monitoring of earth leakage current

02

Displays the measured earth leakage current

03

Adjustable current sensitivity supports different protection requirements

04

Adjustable trip time allows site-specific protection settings

05

Healthy and fault indication provides clear relay status

06

Reset and test facilities support operation and testing

Technical Specifications

Technical Details

Product specifications for engineering evaluation and application selection.

Parameter
Specification
Product Type
Earth Leakage Relay
Series
772X
Order Codes
SYCON 7721, SYCON 7722, SYCON 7723
Current Range - SYCON 7721
30 mA to 300 mA
Current Range - SYCON 7722
300 mA to 3 A
Current Range - SYCON 7723
1 A to 8 A
Input Auxiliary Supply
230 VAC (110 & 415 VAC optional)
Current Sensitivity
Variable from 30 mA to 8 A, settable with DIP switches
Trip Time
0.15 to 3.00 seconds, settable with DIP switches
Relay Contacts
Potential-free NO-C-NC, 10A at 250 VAC
Trip Indication
LED
CBCT
65 mm, 100 mm, 150 mm, 200 mm; other diameters on request
Dimensions
96 (L) x 96 (W) x 60 (D) mm
Applications

Where It Fits

Typical applications for the SYCON 772X.

Earth leakage protection

Application

Industrial electrical panels

Application

Single-phase electrical systems

Application

Three-phase electrical systems

Application

Electrical systems requiring earth leakage current indication

Application
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FAQs

Frequently Asked Questions

Answers to common questions about the SYCON 772X.

The SYCON 772X is an Earth Leakage Relay that continuously monitors earth leakage current using an externally mounted CBCT and trips the system at the set current and after the set time.

Product Inquiry

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SYCON 772X for Your Application?

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