Product category:
Batteries, chargers and circuit protection
News Release from: Carlo Gavazzi | Subject: DPA51 monitoring relay
Edited by the Engineeringtalk Editorial
Team on 18 May 2001
Monitoring relay stops phase sequence
problems
Carlo Gavazzi has introduced its new DPA51 monitoring relay, which eliminates phase sequence and phase loss problems in 3-phase systems to eliminate the risk of incorrect rotation of a motor
Detecting phase sequence failure completely eliminates the risk of incorrect rotation of a motor In response to this Carlo Gavazzi has introduced its new DPA51 monitoring relay, which eliminates phase sequence and phase loss problems in 3-phase systems
This article was originally published on Engineeringtalk on 1 Mar 2001 at 8.00am (UK)
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Total and partial loss detection, even where a regenerated voltage is present, prevents a multitude of problems that can occur during a single failure, such as overheating of motors and loss of phase.
As a result the DPA51 is suited for lifts, cranes and escalators, and any application where it is vital that phase rotation is absolutely correct.
The DPA51 detects regenerative voltage up to 70% of the mains nominal voltage (phase-neutral).
The device monitors its own 3-phase power supply and the relay operates when all the phases are present and the phase sequence is correct.
The relay releases when one phase neutral voltage drops below 70% of the other phase-neutral voltages or when the phase sequence is wrong.
LED indicators show when the relay and power supply are on.
The relay measures only 17.5x 81x 67.5mm in size and its space saving housing is suitable for DIN rail mounting for both back and front panel configurations.
In addition when mounted in larger industrial electrical panels, it can provide the same functionality as devices up to three times its size.
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