Avr Sx440 Automatic Voltage Regulator Half-wave For Generator Fks

US $60.43

Shanghai, China
Jan 29th

Open on mobile:
QR code

High Quality NEWAVE STAMFORD AVR SX440 Automatic Voltage Regulator Click to Enlarge Features: Brand new with high quality SX440 General description SX440 is a half-wave phase-controlled thyristor type Automatic Voltage Regulator (AVR) and forms part of the excitation system for a brush-less generator. In addition to regulating the generator voltage, the AVR circuitry includes under-speed and sensing loss protection features. Excitation power is derived directly from the generator terminals. Positive voltage build up from residual levels is ensured by the use of efficient semiconductors in the power circuitry of the AVR. 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 +/-0.5%. In addition to being powered from the main stator, the AVR also derives a sample voltage from 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 output 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. Provision is made for the connection of a remote voltage trimmer, allowing the user fine control of the generator's output. Technical specification: INPUT Voltage: 170-250V ac max Frequency: 50-60 Hz nominal Phase: 1 Wire: 2 OUTPUT : Voltage: Max 90V dc at 207V ac input Current: Continuous 4 A dc Transient: 6 A for 10 secs Field Resistance: 15 ohms minimum REGULATION: (See Note 1) +/-1.0% THERMAL DRIFT (after 10 min) 1% for 40 C change in AVR ambient TYPICAL SYSTEM RESPONSE AVR response: 20 ms Filed current to 90%: 80 ms Machine Volts to 97%: 300 ms EXTERNAL VOLTAGE ADJUSTMENT(see note 2) +/-8% with 1 k ohm 1 watt trimmer Set point (see note 3): 95% Hz Slope: 170% down to 30 Hz UNIT POWER DISSIPATION 12 watts maximum BUILD UP VOLTAGE ACCESSORY INPUT +/- 1V = +/- 13% change in output volts QUADRATURE DROOP SENSITIVITY Maximum sensitivity (10 Ohm Burden) 0.07A for 5% droop @ 0p. F. ENVIRONMENTAL Vibration 20 -100 Hz 50mm/sec 100Hz -2kHz 3.3g It is buyer's responsibility to contact us within 14 calendar days of receiving a defective product. Otherwise, no replacement or refund will be made. All items MUST be returned in their original condition. Buyer is responsible for shipping and proof of delivery on all returns. We aim to achieve a 5 stars rating for each and every transaction. If you are not 100% satisfied, PLEASE don't leave a neutral or negative feedback or low 1, 2 DSR before you contact us for help. Also please note that due to the recent Air Cargo Security Alerts, there may be delays totally outside our control. Your purchase will be shipped via standard airmail, which normally takes 7-20 working days to reach you. We also offer express shipping, which normally takes 4-7 working days to reach you. You should expect to pay any amount, if there is any, charged by the government in your respective country; this includes (and is not limited to) duties & taxes. We accept PayPal only. inkfrog terapeak i000000 On Nov-28-14 at 20:56:40 PST, seller added the following information: