WIJAYA EQUIPMENTS, HP : 0856 157 3188, 0852 8626 9999, 08787 121 2022, E-mail : wijaya789@gmail.com. WIJAYA EQUIPMENTS, berlokasi di daerah BSD City, Tangerang Selatan, Banten, Indonesia. WIJAYA EQUIPMENTS, berpengalaman lebih dari 25 tahun di bidang Material Handling Equipment, Warehouse Equipment, Logistic System, Racking System, Warehouse Forklift, Distribution System, Otomation, Construcion Equipment, Engineering Equipment.
AVR Stamford
is a half wave phase controlled thyristor type AVR and forms part of the
excitation system for a brushless generator. The design employs Surface Mount
Technology (SMT) for high integration of features in a small footprint AVR.
Positive
voltage build up from residual levels is ensured by the use of efficient
semiconductors in the power circuitry of the AVR. The power and voltage sensing
circuits have separate terminals, allowing the excitation power to be derived
directly from the stator winding for basic applications or from an auxiliary
winding if sustained short circuit performance is required.
The
AVR is linked with the main stator windings and the exciter field windings to
provide closed loop control of the output voltage with load regulation of +/-
1.0%.
The
AVR voltage sensing terminals continuously sample the output windings for
voltage control purposes. In response to this sample voltage, the AVR controls
the power fed to the exciter field, and hence the main field, to maintain the
machine output voltage within the specified limits, compensating for load,
speed, temperature and power factor, of the generator.
A
frequency measuring circuit continually monitors the generator output and
provides under-speed protection of the excitation system, by reducing the
output voltage proportionally with speed below a pre-settable threshold. A
manual adjustment is provided for factory setting of the under frequency roll
off point, (UFRO). This can easily be changed to 50 or 60 Hz in the field by
push-on link selection.
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