LIXISE The generator voltage regulator the AVR control of generator AVR to adjust: control potentiometer position, refer to the corresponding AVR figure.

In the initial starting operation has adjusted the VOLTS) "voltage regulation" and the "STABILITY" STABILITY), AVR voltage collapse caused by low frequency control functions (UFRO) generally do not need to adjust.If it is found that when the load voltage regulation differential voltage even plummeted, please refer to the following paragraphs detail for each function.First check whether the observed symptoms does need to adjust, and adjust properly.

Voltage collapse caused by low frequency (UFRO) (apply LIXISE SX460, SX440, MX341,Type MX321 the generator voltage regulator AVR).AVR one attached to a low frequency protection circuit, the voltage/frequency characteristics as shown in figure 1 a.

Figure 1 a 1 relationship between frequency and voltage

1. UFRO control potentiometer setting "knee point" positionImproper setting will produce the following situations:

1) of the one on the top of the UFRO control potentiometer light-emitting diode (LED) when the load has been lit.

2) low when the load voltage regulation, namely the generators on the characteristic curve of diagonal lines.Clockwise rotation will make the knee point frequency decreases, leds put out at the same time.The best setting of once when the frequency is lower than the normal range, namely the generator frequency 50 hz is 47 hz. 57 hz for generator frequency of 60 hz, indicator light will shine.

When using MX341 type or MX321 AVR, if the indicator and no voltage output, and then refer to the following field trip and overvoltage part.

2. The field TRIP (EXC TRIP) (type MX341 and MX321 AVR)

When two phases or neutral wire with a short circuit occurs, the permanent magnet machine power supply of AVR will provide maximum excitation power.In order to protect the generator winding, AVR and an excitation circuit is connected, once detected excessive excitation current, the circuit in a preset time (such as 8 ~ 10 s) will be cut off after excitation.Field trip Settings will make the generator voltage during load or slightly overload on plummeted, leds have been lit at the same time.The correct setting is the voltage between terminal x and x x is 70 V (1 + 5%).

3. The OVER voltage protection, OVER/V) (type SX440 and MX321 AVR) force ksetra-ksetrajna AVR contains over-voltage protection circuit, when the AVR without detection information input, it will destroy of generators is magnetic.AVR MX321 type has two functions: one is the built-in electronic magnetic circuit, another is to produce a signal to trigger the external circuit switch.Type SX440 AVR only external circuit switch to produce a signal.When need overvoltage protection, must install this switch.Overvoltage protection Settings will cause the generator at no load or unload voltage plummeted, led lights at the same time.The correct Settings for terminal between El and FA voltage is 300 V (1 + 5%).The OVER/V control potentiometer clockwise will keep line voltage increases.

4. The instantaneous load regulation (SX440, MX341 and MX321 AVR)

AVR additional voltage drop (DIP) and recovery time delay (DWELL) control function, make the generating set with the optimization of load capacities.The whole the performance of the generator set by the performance of the engine and governor response rate and is determined by the characteristics of the generator.Adjust the level of voltage drop and the recovery time and engine performance has much to do, so in the frequency and voltage drop must make a compromise.

Voltage drop: SX440, MX341 type and MX321 AVR voltage drop function control potentiometer a speed adjustable voltage (r/min) characteristic "knee point" in the following sections of the draft, as shown in figure 1-2.

Figure 1 a 2 voltage speed characteristics

5. Recovery time delay characteristics (MX321 AVR)

Recovery time delay function which increase the time delay between the voltage recovery and speed recovery.Delay in order to reduce the generator power below allow power engine, so that you can to speed up the recovery of the generator speed.Also, this control is only effective under the knee point ", namely if the load generator speed (frequency) above the knee point ", then the function Settings will not work.Clockwise adjustment will increase the recovery time.As shown in figure 1 a 3.

Figure 1 a three time delay characteristics

Shown above is only hint, because must describe the comprehensive effect of voltage regulator and the engine governor work is impossible.

Build time pressure adjusting (RAMP) (MX321 AVR) build time adjusting knob adjustable spontaneous motor starting to build pressure time after the rated speed.Factory set up for 3 s, the set can meet most applications.Adjusting knob counterclockwise to the end time can be reduced to 1 s, adjusting knob clockwise to the end time can be extended to 8 s.

In all adjustment is completed, please cover the AVR cover plate.