NewElec designs, manufactures and markets three-phase motor protection relays, some of which are geared towards specific applications, such as pump protection. The NewElec development team has worked with experts in the pumping industry to perfect relays designed to suit these specific applications.
As an example, the dry run protection (or minimum load, or load loss) types help to trip the pump when there is no more media circulating. This is important to safeguard the pump from cavitation, which could cause damage to the impeller. The settings for dry run are determined by the percentage load level where the pump is known to be running empty, and the associated time required to confirm this condition. This percentage load level is obtained by testing and using empirical data for the specific pump, whereas time delay is typically set to 10 s, or operating specification. Additionally, it needs to be determined when the pump can restart safely and continue to pump. This can either be calculated based on the pumping infrastructure, for instance dam or sump level, or trial and error.
All these parameters can be easily set on NewElec’s KD/KE or NewCode relays, which are geared for pumping environments and applications.
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