Features: _x000D_ 1. In normal operating condition, it can maintain the voltage of bus in a given level, so it acts as a voltage regulator. It can distribute of reactive power between units stably._x000D_ 2. Low-frequency Protection: when the built-in engine revolution declines, the output voltage frequency will also decline to protect circuit._x000D_ 3. It can improve the dynamic performance of power system operation and transmission capacity of transmission lines._x000D_ 4. The introduction of ballast excitation control, effectively inhibit low-frequency oscillation and improve power system dynamic quality._x000D_ 5. Frequency: 50-60Hz nominal, regulation: +/- 1.0%, working temperature: -40~60 ._x000D_ _x000D_ Specifications:_x000D_ Color: As Pictures Shown_x000D_ Weight: Approx. 486g_x000D_ _x000D_ Package Include: _x000D_ 1 * Automatic Voltage Regulator 1In normal operating condition, it can maintain the voltage of bus in a given level, so it acts as a voltage regulator. It can distribute of reactive power between units stably 2Low-frequency Protection: when the built-in engine revolution declines, the output voltage frequency will also decline to protect circuit 3It can improve the dynamic performance of power system operation and transmission capacity of transmission lines 4The introduction of ballast excitation control, effectively inhibit low-frequency oscillation and improve power system dynamic quality 5Frequency: 50-60Hz nominal, regulation: +/- 1.0%, working temperature: -40~60