490NRP25300 SCHNEIDER

Description

Product name ：490NRP25300 SCHNEIDER Power module
Product details:

The time it takes for a melting alloy device to trip is determined only by the level of current in the
remaining phases. The majority of the motors installed (world-wide) are run at about 70% of their full
load capability. In these situations, the phase loss condition may result in a level of current in the
remaining phases just slightly above the actual FLA of the motor and, therefore, only slightly above the
rating of the thermal unit. Therefore, it could take a substantial amount of time for the melting alloy device
in this application to respond to phase loss.
The bi-metal device offers a limited form of phase loss protection by means of a differential tripping
mechanism where the device will trip somewhat faster when an overload is detected on only two of the
phases. This device contrasts with a solid state overload relay with phase loss protection that would trip
in less than three seconds and alert the user of a potential distribution system problem in advance of
motor failure. Consequently, the problem does not have an opportunity to affect other equipment on the
system.
The solid state device also provides phase unbalance protection where the device will trip if the current
on any phase is 25% greater than the average of all three phases. Phase unbalances are typically
caused by an unbalanced up-stream single phase load that can disturb phase voltages. Such a
condition can similarly lead to excessive rotor currents and motor da

Advantages: Foxboro, OVATION, TRICONEX, Allen-Bradley, ABB, Motorola, Siemens Moore, Ge Fanuc, Woodward, Bently Nevada and other major import brands!

We have the same series of models in stock.  If you don’t find the model you need, please contact us and we will provide you with an official quotation！

Colour：new Warranty: 12 months
Lead Time：3-day working day Country of origin: Sweden
Price: Please contact us Product weight：0.515kg
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service

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