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ABB NTHS03 is an ABB Harmony Rack hydraulic servo termination unit used in turbine-control servo applications and retained in the documented SPHSS13 evolution architecture.
NTHS03 works with the associated NKHS03 cable and provides the field termination path for servo demand, LVDT feedback and hydraulic servo output circuits.
ABB NTHS03 must be matched to the servo module, cable, redundant coil arrangement, LVDT wiring and control configuration before replacement because calibration and polarity directly affect valve response.
ABB NTHS03 is a hydraulic servo termination unit for Harmony Rack and INFI 90 control-system hardware. Its role is defined by the connected module, cable and field or network circuits.
Replacement requires confirmation of the complete model, revision, module pairing, terminal assignments and cabinet installation rather than selection by appearance alone.
NTHS03 is the field termination unit associated with Harmony hydraulic servo control and the SPHSS13 evolution path. Verify NKHS03 cable selection, LVDT wiring, feedback polarity, servo-coil circuits, grounding and controller configuration before calibration.
It terminates hydraulic valve position feedback, demand and servo output circuits in turbine-control systems.
Secure the turbine and hydraulic system, label LVDT and coil circuits, match the NKHS03 cable, verify polarity and complete the documented servo calibration before operation.