Schaffner has expanded its line of dv/dt filters to include the FN5060HV which protects AC motors up to 690/600VAC from destructive effects of peak voltages and inrush amps. This patented technology protects motors and adjacent equipment without capacitors or resistor. They efficiently reduce high output dv/dt from IGBT motor drives and eliminate over-voltages caused by line reflections on motor cables, per IEC 60034-17/25. Typical dv/dt reduction is a factor of 8 to 12.
It might seem like an odd objective, but the potential efficiency gains are real. And from heat recovery chillers to modified humidification targets so are the opportunities to replace steam production with hot water generation and to manage remaining steam needs more intelligently.
The production of thermal power is critically important in carrying out the mission of health care facilities where it is used for space heating, humidification, domestic water heating, and for processes in dietary, laundry, and sterilization departments. The age of the hospital, the programs offered, and the regional climate will all affect the demand for thermal power.
Nidec Motor Corporation (NMC) has launched a new family of variable speed products, which the company says offers product compatibility for a true system solution. With NMC’s ACCU-Series™ product line, customers can match a U.S. MOTORS® brand inverter duty motor with an NMC drive or panel or purchase integrated motors and controls. These products are solution driven and are designed to be used together as a system.
By diverting harmful VFD-induced shaft voltages safely to ground, AEGIS® PRO Series Rings protect large AC and DC motors from bearing damage. Available for motor shafts to 30-in diameter, AEGIS® PRO Series Rings are specially designed for high-current applications such as generators, turbines, and medium-voltage motors.
JVL says its new MIS23 QuickStep is a series of versatile, compact, economical integrated stepper motors. Integrated stepper motors in the MIS23 series have NEMA 23 flange dimensions of 57 mm by 57 mm and are available in three models with rated torques of: 1.1 Nm (MIS231), 1.6 Nm (MIS232), 2.5 Nm (MIS234) (1000 RPM @ 48VDC). To reduce cost and protect against electrical noise many of the control and communication functions have been integrated with the motor in a housing designed to provide IP42, IP55 or IP65 protection, and eliminating the need for running control and communication cables. Different PCB’s (modules) can be mounted within the housing to create an automation/motion control system that is easy to incorporate into new and existing applications, according to the company.
From a missing pipe hanger three floors down to steam traps past their prime, these stories show how steam system problems can originate inside the boiler room or far beyond it. Read more in February issue.