LTQ008 – LTQ230 Series 3-Phase Products User Instructions – AIIOM000165 EN
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The range of 3-phase actuators starts with simple models having basic operability to quite complicated models
with full featured protection circuitry and local control capabilities. The various levels of these actuators might
seem to be easily adaptable across any site or design intent, but they are actually very specific as to how they
interface to existing or new installations.
The most basic units (NCU units) have no safeties, meaning the installer is fully responsible for connecting and
immediately checking the motor rotation. The installer must correct the rotation if it is reversed, before damage
can occur to the actuator, motor, and connecting device. The BIC units have phase correction built-in,
meaning that these models will automatically correct phase discrepancies regardless of how the incoming
power is landed on the main terminal strip. However, it must be noted that installations with existing motor
control centers may only be able to utilize NCU actuators.
It is important to fully understand what level of control is required prior to selecting one of these products. While
it might make sense to opt for the most feature-laden solution to cover all the possibilities in a given application,
that selection would, in fact, not function in an application that simply required the most basic unit. For this
reason, it is imperative to know the application completely before selecting a solution.
Read the project specifications and understand the application before making an actuator selection. If in
doubt, consult with a project engineer to clarify what is actually required for a fully operational installation.
Despite all of Flowserve’s efforts to provide comprehensive information and instructions in this document on
how to determine the various actuator levels, questions will arise. Contact Flowserve for further information
before placing orders when unsure of the level of control required.
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