Star Engineering

• Over excitation conditions are limited to a safe period by a protection circuit within the AVR. 
• Provision is made for the connection of a remote voltage trimmer, allowing the user fine control of the generator's output.
• An analogue input is provided allowing connection to the Power Factor controller or other external devices with compatible output.
• The AVR has the facility for droop CT connection, to allow parallel running with other similarly equipped generators. 
• Potential Divider and Rectifier takes a proportion of the generator output voltage and attenuates it. The potential divider is adjustable by the AVR Volts potentiometer and external hand trimmer (when fitted). The output from the droop CT is also added to this signal. A rectifier converts  the a.c. input signal into d.c. for further processing. The DC Mixer adds the Analogue input signal the Sensing signal.
• The Amplifier (Amp) compares the sensing voltage to the Reference Voltage and amplifies the difference (error) to provide a controlling signal for the power devices. The Ramp Generator and Level Detector and Driver infinitely control the conduction period of the Power Control Devices and hence provides the excitation system with the required power to maintain the generator voltage within specified limits.
• The Stability Circuit provides adjustable negative ac feedback to ensure good steady state and transient performance of the control system.
• The Low Hz Detector measures the period of each electrical cycle and causes the reference voltage to be reduced approximately linearly with speed below a presettable threshold. A Light Emitting Diode gives indication of underspeed running.
• The Synchronising circuit is used to keep the Ramp Generator and Low Hz Detector locked to the generator waveform period.
• The Low Pass Filter prevents distorted waveforms affecting the operation of the AVR control circuit. The Short Circuit Detector senses the presence of a short circuit on the generator output and forces the Power Control Devices into full conduction. This only occurs when the AVR is powered from an auxiliary winding.
• Power Control Devices vary the amount of exciter field current in response to the error signal produced by the Amplifier.
• Suppression components are included to prevent sub cycle voltage spikes damaging the AVR components and also to reduce the amount of conducted noise on the generator terminals.
• The Over Excitation Detector continuously monitors the exciter field voltage and provides signals, to collapse the output voltage if an over excitation condition persists for the specified time period. The Power Supply provides the required voltages for the AVR circuitry.
• A frequency measuring circuit continually monitors the generator output and provides 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.
• The AVR voltage sensing terminals continuously sample 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. 
• Positive voltage build up from residual levels is ensured by the use of efficient semiconductors in the power circuitry of the AVR. The power and voltage sensing circuits have separate terminals, allowing the excitation power to be derived directly from the stator winding for basic applications.

R448 Automatic Voltage Regulator (AVR) provides closed loop control of the alternator output voltage by regulating the exciter field current. ... The power supply voltage is rectified and filtered before being used by the AVR monitoring transistor.

GAVR 8A
Universal 8 Amp 1/2 Wave Self Excited Dip-Switch Programmalbe Automatic Voltage Regulator

We are offering an extensive series of Single Phase Automatic Voltage Regulator. These products are extremely employed in the market for diverse purposes.

Features:

1. Adopted of high quality electronic components, and accuracy process, for the durability

2. High accuracy, the pressure regulation accuracy is less than ±1%

3. Professional design, it can provide stable performance.

4. Suitable for S0/ (7.5KVA-62.5KVA) generator

5. With generator voltage regulation, over voltage , low , high voltage stability and adjustable voltage range

Specification:

Condition: 100% Brand new

Model: AS540

Detection and Power Input: Voltage 120 (95-130) / 240 (190-265) VAC

Single-phase two-wire selection with jumper copper

Magnetic Field Output: Maximum 82V DC at 200VAC input

Current: 4A Continuous, non-continuous 10 seconds 7.5A

Pressure Regulation Accuracy: <±1%

Package List:

1 x Voltage Regulator

We are engaged in supplying high-quality 6M 40A AVR (Automatic Voltage Regulator) specially designed for slipring type generators. This AVR provides stable voltage output and ensures smooth generator performance under varying load conditions.

The 6M 40A AVR is manufactured using high-grade electronic components, making it durable, efficient, and reliable for long-term use. It is widely compatible with various diesel generator brands and easy to install.

Our product is ideal for industrial and commercial generator applications where voltage stability is critical.

We are offering high-quality V200 AVR (Automatic Voltage Regulator) designed for generator applications. This AVR ensures stable voltage output and protects generator components from voltage fluctuations.

The V200 AVR is built using advanced electronic components, providing reliable performance, durability, and efficient voltage control. It is suitable for various diesel generators used in industrial and commercial sectors.

Easy to install and maintain, this AVR is widely trusted for consistent generator performance.

• Load acceptance module (LAM)
• Under frequency & Exc. max protection
• Single phase or three phase voltage sensing optional
• Soft start voltage ramping
• Normal rapid response time (option)
• Function: Built-in low-speed , over excitation LAM,

We are engaged in offering a wide range of Kavr 2 Op AVR to our clients. Our range of all products is widely appreciated by our clients.

We are one of the trusted companies of 7S Brushless Automatic Voltage Regulator. Our products are enormously admired in the market owing to their top features.

We are engaged in offering a wide range of CG Avt SR 7 to our clients. Our range of all products is widely appreciated by our clients.

• Compact low cost model suitable for Brush less Alternators
• Suitable for 3 Phase (415 V) or 1 Phase (220V) Brush less Alternators.
• Can be connected to Isolated Auxiliary Winding of 220 V AC.
• Maximum output Excitation 100 V DC and 6 A DC.
• Suggested minimum Filed Resistance 14 Ohms.
• Provision for remote potentiometer.
• Under Frequency protection with LED indicator.
• Time delay Over Excitation Protection with LED indicator.
• Jumper Link for 50 / 60 Hz operation.
• High PIV power devices prevents catastrophic failure.
• Fuse Protection.
• Size: 108 X 70 X 35 mm.
• Weight: 220 gm.

• SX460 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 +/- 1.0%. 
• 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 pushon link selection. Provision is made for the connection of a remote voltage trimmer, allowing the user fine control of the generator's output. Potential Divider and Rectifier takes a proportion of the generator output voltage and attenuates it. This input chain of resistors includes the range potentiometer and hand trimmer which adjust the generator voltage. A rectifier converts the a.c. into d.c. for further processing. 
• The Amplifier (Amp) compares the sensing voltage to the Reference Voltage and amplifies the difference (error) to provide a controlling signal for the power devices. The Ramp Generator and Level Detector and Driver infinitely control the conduction period of the Power Control Devices and hence provides the excitation system with the required power to maintain the generator voltage within specified limits.
• The Stability Circuit provides adjustable negative ac feedback to ensure good steady state and transient performance of the control system. The Low Hz Detector measures the period of each electrical cycle and causes the reference voltage to be reduced approximately linearly with speed below a presettable threshold. A Light Emitting Diode gives indication of underspeed running.
• The Synchronising circuit is used to keep the Ramp Generator and Low Hz Detector locked to the generator waveform period.
• The Low Pass Filter prevents distorted waveforms affecting the operation of the AVR. Power Control Devices vary the amount of exciter field current in response to the error signal produced by the Amplifier.
• Suppression components are included to prevent sub cycle voltage spikes damaging the AVR components and also to reduce the amount of conducted noise on the generator terminals.  The Power Supply provides the required voltages for the AVR circuitry. 
• The generator output voltage is set at the factory, but can be altered by careful adjustment of the VOLTS control on the AVR board, or by the external hand trimmer if fitted. Terminals 1 and 2 on the AVR will be fitted with a shorting link if no hand trimmer is required. Terminals 3 and 4 are linked only for special low voltage applications. 
• The AVR includes a stability or damping circuit to provide good steady state and transient performance of the generator.
• The correct setting can be found by running the generator at no load and slowly turning the stability control.

• 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 +/- 1.5%.
• 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 pushon link selection. Provision is made for the connection of a remote voltage trimmer, allowing the user fine control of the generator's output.
• With 4% engine governing
• After 10 minutes.
• Applies to Mod status F onwards. Generator de-rate may apply. Check with factory.
• Factory set, semi-sealed, jumper selectable
• Non condensing.
• Standard Applications
• Stamford Alternator BC16, BC18, UC22, UC27
• InGENERAL POWER weunderstandthe urgency of your requirements for emergency and back up generators, and we have committed by establishing automatic voltage regulator stock of 500+ units in Miami Florida generator stock of 300+ units in Miami Florida currently serving:
• Pay Mode Terms: L/C (Letter of Credit), T/T (Bank Transfer), D/P, D/A, Other

Crompton Greaves AVR modal no - SMR
SMR AVR REPLACMENT OF UVR 7
THIS AVR FOR CROMPTON GREAVES alternator

• New Starix parts,Automatic Voltage Regulator AVR R450 for Leroy Somer Generator
• The R450 is analog Automatic Voltage Regulator with transistors.
• Fits LSA 46.2, 47.2, 49.1 and LSA 50.2 alternators. Optional for LSA 42.2, 43.2, 44.2. alternators Adapted to the SHUNT, AREP or PMG excitation systems.
• Voltage regulation +/- 0.5% at steady state and constant speed. Control by transistor means that the regulation quality is independant of applied load. Phase to phase voltage sensing. Suitable for high levels of vibration and harsh environments. Integrated "LAM" and " auto adaptative LAM" system to cope with load impacts applied to the engine AREP or PMG excitation with normal or fast response. Single or three phase voltage sensing with optional module. Rotating switch facilitating selection.

We are offering premium quality Crompton UVR7 AVR (Automatic Voltage Regulator) suitable for generator applications. This AVR ensures stable voltage output and protects the generator from voltage fluctuations and overload conditions.

The UVR7 AVR is designed with advanced technology to provide accurate voltage regulation, high efficiency, and long service life. It is widely used in diesel generator sets for industrial and commercial applications.

Easy to install and maintain, this AVR is compatible with various generator systems.

• The DSR regulators are an advanced AVR regulator replacing the traditional automatic voltage regulator. This voltage regulator is fully digital controlled and is fitted as standard across all our ECO and ECP models.
• Connections on the DSR regulators are through 15 fast on / fast off connectors which speed up the connection process. This is especially useful if reconnecting a 12 wire machine to any specific voltage. This regulator is cross-compatible with all ECO and ECP machines and can be used as standard with the MAUX system and the PMG ma systems, so there’s never any need to change regulators. Its single phase sensing comes as standard.
• By means of the external communication board (DXR or DL1), computer connection (RS232 or USB) or PLC connection (RS485 via MODBUS) is available. This allows changes to the AVR settings, to monitor in real-time performances (Voltage, Frequency or DSR status), or to download the alarm report (Communication software is available from Mecc Alte).
• Analogical remote control of output voltage is possible through external voltage (0÷2,5Vdc) or with a 10 Kohm linear potentiometer
• Underspeed protection with adjustable threshold and slope
• Overvoltage and undervoltage alarms
• Excitation overcurrent protection with delayed intervention
• Management of temporary short circuits (start up of asynchronous motors)
• Open collector output (not insulated) signalling intervention of protective devices (insulation on optional DI1 module) with programmable activation with respect to the individual alarms and the possibility to delay intervention
• Abnormal operation conditions storage (type of alarm, number of events, duration of the last event, total time)
• Memorization of the regulator operation time (starting from revision 11 of the Firmware)
• USB communication interface (with an optional USB2DxR module)

We are engaged in offering a wide range of Tavr 30 Automatic Volatage Regulator to our clients. Our range of all products is widely appreciated by our clients.

Details:

• The MX321TM analogue, 3-phase sensing, permanent magnet generator (PMG) powered automatic voltage regulator (AVR) provides isolation from the effects of non-linear loads, improved motor starting performance and sustained short circuit current.
• The MX321TM AVR is provided as standard for the STAMFORD® S6 and HC6 alternators and can also be provided as an option across the STAMFORD® range. To ensure your MX321TM AVR is genuine, purchase it from an authorised NEWAGE® | STAMFORD® | AvK® dealer.
• MX321™ is a three phase sensed Automatic Voltage Regulator and forms part of the excitation system for a brush-less generator. Excitation power is derived from a three-phase permanent magnet generator (PMG), to isolate the AVR control circuits from the effects of non-linear loads and to reduce radio frequency interference on the generator terminals. Sustained generator short circuit current is another feature of the PMG system.
• The AVR senses the voltage in the main generator winding and controls the excitation to maintain the generator output voltage within the specified limits, compensating for load, speed, temperature and power factor of the generator. Three phase RMS sensing is employed for superior voltage regulation.
• Adjustable Soft start circuitry is included to provide a smooth controlled build up of generator output voltage. A frequency measuring circuit continually monitors the shaft speed of the generator and provides under-speed protection of the excitation system by reducing the generator output voltage proportionally with speed below a pre-settable threshold. A further enhancement of this feature is an adjustable volts per Hertz slope and voltage recovery time, to improve the response of turbo charged engines. 
• Current limiting may be included to allow control over the amount of sustained short circuit current. Maximum excitation is limited to a safe period by internal shutdown of the AVR output device. This condition remains latched until the generator has stopped. The AVR includes an over-voltage protection feature with internal shutdown of the AVR output device, plus the ability to trip an optional excitation circuit breaker if required. Provision is made for the connection of a remote voltage trimmer, allowing the user fine control of the generator's output. 
• An analogue input is provided allowing connection to a Newage Power Factor controller or other external device with compatible output.
• Potential Divider and Rectifier takes a proportion of the generator output voltage and attenuates it. The potential divider is adjustable by the AVR Volts potentiometer and  external hand trimmer (when fitted). The output from the droop CT is also added to this signal. A rectifier converts the a.c. input signal into a d.c. signal representing generator voltage. 
• The AVR has the facility for droop CT connection, to allow parallel running with other similarly equipped generators. 
• The DC Mixer adds the Analogue input signal the generator voltage signal. 
• The 3 Phase Rectifier converts the output of the current limit CT’s into a dc signal representing generator current.
• The Amplifier (Amp) compares the generator voltage or current signals to the Reference Voltage and amplifies the differenceerror to provide a controlling signal for the power devices. The Ramp Generator and Level Detector  and Driver infinitely control the conduction period of the Power Control Devices and hence provides the excitation system with the required power to maintain the generator  voltage within specified limits.
• The Stability Circuit provides adjustable negative ac feedback to ensure good steady state and transient performance of the control system.
• The Power Supply provides the required voltages for the AVR circuitry.

• The AS480 is an analogue, 2-phase sensing, self-excited automatic voltage regulator (AVR) incorporating an interface for the optional Excitation Boost System (EBS) for improved motor starting performance and sustained short circuit.
• The AS480 is provided as standard on STAMFORD® P0 and P1 alternators. To ensure your AS480 is genuine, purchase it from an authorised NEWAGE® | STAMFORD® | AvK® dealer.
• There is a range of the above mentioned AVRs that have been UL (Underwriters Laboratories)  certified for use on UL certified alternators. For more information on UL, refer to AGN236 
• Excitation System: Type of excitation method supporting the AVR control.
• Voltage Regulation: AVR’s capability to control the steady state voltage output.
• 3 Phase Sensing: Voltage sensing on all 3 phases. Useful when there are separate 1 phase loads of different magnitudes connected to a 3 phase alternator.
• Paralleling Capability: The AVR has the capability to allow the alternator to synchronise with other alternators, operating in parallel using Droop CTs.
• Sustained Short Circuit: With PMG or Auxiliary Winding Excitation; gives the alternator a current ‘forcing’ capability to ensure accurate circuit breaker activation in a fault situation. 
• Stator Current Limiting: With an additional CT, stator current can be limited during an overload situation, such as starting a large motor, or in a short circuit condition. This helps the prime mover with recovery following load application, or limits fault current contribution, allowing smaller circuit breakers.
• Over Voltage Protection: Prevents alternator damage if the voltage exceeds a pre-set limit, such as with a grid connected application.
• Under Frequency Protection: Prevents alternator damage if the frequency, or speed, drops below a pre-set threshold. A sustained Generating Set engine overload may cause this. ) UFRO: Under Frequency Roll Off is effectively the same as 8), above. However, the roll off “Knee Point” is adjustable and can be set to allow assistance to the prime mover during load acceptance.
• Linear V/Hz Slope: This capability allows the alternator terminal voltage to decrease or increase at a level directly proportional to speed (Hz). Useful for variable speed applications.
• Voltage Matching: Equalises the alternator’s terminal voltage with other synchronised alternators, or power grid, connected in parallel. Less sophisticated Generating Set synchronising equipment can be utilised.
• P.F. & VAR Regulation: Suitable for grid connected applications, where the grid voltage cannot be controlled by the alternator and therefore, regulation is achieved by control of Reactive current, i.e. Var. Allows a less sophisticated Generating Set controller to beutilised. Over-Exc. Protection: Prevents alternator damage if the pre-set maximum excitation levels of current are exceeded.
• Under-Exc. Protection: Prevents alternator damage, caused by possible pole-slipping, if pre-set minimum excitation levels of current are exceeded.
• Excitation Isolation: By switching the excitation off it is possible to “soft start” loads such as large motors and transformers without high levels of inrush current.
• Power Stabilisation: Improves the stability of the alternator over the highest possible operation range. Particularly useful for grid connect applications requiring Grid Code compliance.
• Excitation CB: MCB for use as a switch when excitation isolation is required.
• Diode Failure Detection: By sensing the level of ripple current in the exciter output it is able to provide an indication of a failed diode, either short or open circuit. Enabling an alarm or shutdown to occur, depending on the Generating Set control methodology.