Basler Electric KR-FF Series overview
Basler Electric KR-FF and KR-FFMX Series Static Voltage RegulatorsThe KR series of regulators provides field excitation voltages of 32, 63, and 125 Vdc for 50/6...
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Manufactured byBasler Electric
Product groupModules
DescriptionBasler Electric KR-FF and KR-FFMX Series Static Voltage RegulatorsThe KR series of regulators provides field excitation voltages of 32, 63, and 125 Vdc for 50/60 Hz generators to maintain the generator line voltage within a tight regulation band. Sensing voltage selection is accomplished using easily accessible, Faston terminals.All KR voltage regulators utilize thyristors in the power stage. They employ built-in electromagnetic interference (EMI) suppression to reduce the conducted interference generated by the thyristors. Figure 4 provides details on the levels of EMI suppression.Selection of 50 Hz or 60 Hz underfrequency protection is easily accomplished through the use of Faston terminals. *Although the underfrequency operational threshold is normally factory preset at a nominal 6.0 Hz below the system frequency. The percentage of generator output voltage obtained for a specific reduction in frequency is illustrated in Figures 2 and 3.A full line of accessories is available for use with the KR regulators, enabling the user to meet other system requirements including excitation support, paralleling, and manual voltage control.KR-FFMX: The KR-FFMX regulators are designed to operate in a high humidity environment. Although similar to the KR-FF, the KR-FFMX utilizes hermetically sealed components, moisture resistant sealed transformer, sealed potentiometers and urethane coated printed circuit board and wire connections.
ApplicationsThe KR-FF and KR-FFMX static voltage regulators provide precise generator line voltage regulation. They are suitable for use with small and medium size generators using brush or brushless rotary exciters. The KR-FF and KR-FFMX series of regulators also provides underfrequency protection and contains built-in suppression for conducted EMI.
Key FeaturesRegulation accuracy better than ±1%. Applicable to either 50 Hz or 60 Hz generators. EMI suppressed. Built-in underfrequency protection for voltage regulator and generator system. Moisture resistant (KR-FFMX only). Adjustable stabilization network. Externally adjustable voltage range. Internal “build-up” circuits. Solderless reconnectable Faston terminals facilitate selection of sensing voltage and frequency (50 Hz or 60 Hz). Mechanically rugged, welded steel chassis. Compact, reliable, economical. Complete accessory line available. CSA approved.
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Basler Electric
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Modules
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