The EL731 is a microprocessor-based AC/DC Sensitive Earth-Leakage Relay that offers complete coverage for all frequencies from 0 to 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 sensor input allows over-temperature and under-temperature protection for a motor or drive. The EL731 offers metering, password-protected alarm and trip settings and optional network communications. It is primarily used to add low-level ground-fault protection to variable-speed drives, and to dc circuits.

Features & BEnefits

Adjustable pickup (30–5,000 mA)	Adjustable trip setting provides a wide range of low-level protection and system coordination
Frequency range (0–90 Hz, 20–6,000 Hz)	Operate in either AC or DC mode or both. Use single or combined ranges. Separate metering
32-char OLED display	Earth-leakage metering, setup and programming
Local LED indication	Visual Trip, Alarm, CT connection indication
CT-Loop monitoring	Proactively monitors for open- or short-circuit CT wiring
Analog output (4–20 mA)	Connect to DCS. Allows connection to an optional meter (PGA-0520) or control system
Adjustable time delay	Adjustable trip delay for quick protection and system coordination
Alarm and trip settings	Detect a deteriorating condition before damage occurs
Temperature-sensor input	Monitor motor or drive temperature and respond to high- or low-temperature conditions
Output contacts	Three programmable outputs for tripping or alarming on leakage current, high, or low temperature
Network communication	Optional connection to plant network
Harmonic filtering	Eliminates nuisance tripping due to harmonic noise
Panel, Surface, and DIN-rail mounting	Compact enclosure and flexible mounting options allow for many installation options even in panels with limited space
Universal power supply	Provides flexibility for numerous applications

Documents and Downloads

Document	File Type	File Size	Download
EL731 SERIES Datesheet	PDF	282 KB