General information about the Mecc Alte SR7 AVR
The Mecc Alte Spa SR7 AVR is one of the most important Mecc Alte generator parts is composed of two blocks: Function block and protection block.
Function block of Mecc Alte SR7
Mecc Alte SR7 TTTT is a negative feedback system in which the constant parameter is the voltage output of the generator. This voltage, after appropriate adjustment, is compared with the signal that is stabilized in terms of voltage and temperature. The output is an error signal which, when properly amplified and compensated, generates a control level that goes into the voltage regulator. The output of the SCR pulse generator with a continuously generated excitation voltage undergoes the conversion of the generator’s operating electromagnetics into the generator output voltage. The value of the output voltage is controlled by the sensor block.
Amplifier error of SR7 AVR
This part of the regulator compares and amplifies the reference signal with the signal coming from the output block of the sensor. It is important to emphasize that the signal for comparison must be the signal indicated in the description in order to ddauw the system into negative feedback.
Stable network of AVR SR7
This block is the foundation for the operation of the system. When the generator undergoes sudden load variations, the variation of this part of the circuit is conveniently calibrated which improves system performance. Tuning the system with a short reset time can keep the system in a stable limiting condition. Conversely, a highly calibrated and stable system may be too slow in reset time.
Pulse width modulator of Mecc Alte Spa SR7
This set of electronic regulators transforms the control signal into corresponding pulses that attenuate the power SCRs, so that the value of the generator’s continuous excitation voltage is changed.
References: Mecc alte DSR
References: Mecc alte UVR6
Sensors of Mecc Alte SR7
In this set of circuits, the generator output voltage is properly adjusted and applied to the AC/DC converter, its output signal is compared with the reference signal.
Protection block of SR7 Mecc Alte
The Mecc Alte SR7/2 voltage regulator also has 2 main blocks: Low frequency protection and overload protection.
Low frequency protector of SR7 AVR
The frequency/voltage converter is a fundamental part of the protection block. When the frequency of the output voltage drops below a certain threshold value, the output signal of this block produces a control signal that reduces the generator output voltage to prevent high voltage.
Overload protection of AVR SR7
This part of the voltage regulator circuit protects the generator from the possibility of over-triggering. When the value of the continuum voltage supplied to the generator inductor is higher than the value set by the established threshold. The interference delay of this protection temporarily overloads the generator without reducing the output voltage. Usually, this delay is about 15-20 seconds enough to ensure the engine starts.
Connector pins of Mecc Alte Spa SR7
|1||Sound source pin|
|2||Connect pin 3 if SR7/2 is supplied with a voltage less than 160Vac|
|3||Power pin positive|
|4||Adjustable sensor voltage pin|
|5||Common pins for controller supplies, regulator sensors and external potentiometers|
|6||Connect to pin 5 to operate at 60Hz|
|7||External potentiometer connector|
How to install Mecc Alte SR7 AVR
When using the Mecc Alte SR7 AVR auto voltage regulator, we need to install it as shown for testing and use on the machine.
How to check the error of the Mecc Alte SR7 AVR and how to replace it?
There are many ways to check the error of the Mecc Alte SR7electric regulator such as:
- Power up and check the output sensor pins on the SR7 board.
- Check on the SR7/2 board for any explosions that cause damage to components.
If there are conditions of error, fire damage or failure, please contact us for support as soon as possible.
Currently, the SR7 controller is no longer in use and is replaced by a DSR Mecc Alte voltage regulator. We will advise and supply you with a DSR voltage regulator upon request as a replacement for the SR7 AVR.
Mecc Alte spare parts SR7 AVR at TTTT Global
TTTT Global is the only authorized dealer of Mecc Alte Vietnam and Cambodia, we specialize in supplying Mecc Alte spare parts such as: DER1, DSR, UVR6, SR7,… and all kinds of Mecc Alte generators with full capacity from ECP3 to ECO46 modules and single-phase generators S15, S16, S20, ES20, etc.
TTTT Global Co.,Ltd
Address: L4 09-OT11, Landmark 4, Vinhomes Central Park, 720A Dien Bien Phu, Ward 22, Binh Thanh District, City. Ho Chi Minh, Vietnam.
Phone: 0286 2728334