AVR regulator SX440

AVR REGULATOR SX440 SX440 is a half-wave phase-controlled thyristor type Automatic Voltage Regulator(AVR) and forms part of the excitation system for a brushless alternator. Technical specification input voltage 190-264V ac frequency 50-60 Hz nominal phase 1 wire 2 output voltage Max 90V dc at 207V ac input Current Continuous 4 A dc Intermittent 6A for 10 secs resistance 15 ohms minimum regulation +/- 1.0% (see note 1) Thermal drift 0.04% per deg. C change in AVR ambient (note 2) Typical system response AVR response 20 ms Filed current to 90% 80 ms Machine volts to 97% 300ms External voltage adjustment +/- 10% with 1 k ohm 1 watt trimmer(see note 3) Under frequency protection Set point 95% Hz(see note 4) slope 170% down to 30 Hz Unit power dissipation 12 watts maximum Build up voltage 4 volts @ AVR AND WE CAN PRODUCE HARD GUM WITH GRAY CAPACITOR & SOFT GUM WITH RED CAPACITOR