Stamford AVR AS480

Genuine Stamford Generator Spare Parts for you

Part name : automatic voltage regulator (AVR)

AVR brand : Stamford

AVR model : AS480

Part number : E000-14800

Part application : Stamford Generator

AVR application : power generation

Manufacturer : Cummins Generator Technologies Ltd.

Country of origin : UK

Minimum Order Quantity (MOQ) : 1 piece

Recommended purchase quantity : 1-2 pieces

Packing material : strong carton

Net weight : 0.36 kg /pc

  • Description

AS480 automatic voltage regulator (AVR) for Stamford Generator

AS480 AVR (automatic voltage regulator) for Stamford AC generator (alternator), parts number is E000-14800, manufactured by Cummins Generator Technologies Ltd. This AVR AS480 can be applied on STAMFORD P0 and P1 alternators.

Genuine automatic voltage regulator made in UK for your genuine Stamford generator has a superior quality and an attractive price, recognized by Stamford generator users all over the world.

Technical specification :

Sensing and Power Input

  • Voltage : 100-264 ac 1 phase
  • Frequency : 50-60 Hz nominal

Output

  • Voltage : 82 V d.c. @ 200 Va.c power input.
  • Voltage : 45 V d.c. @ 110 Va.c power input.
  • Current : continuous 5A, transient 7.5A for 10 secs.
  • Resistance : 15 ohms min

Regulation

  • +/- 1.0%

Thermal Drift

  • 0.03% per deg. C change in AVR ambient

Typical System Response

  • AVR response : 20 ms
  • Field current to 90% : 80 ms
  • Machine volts to 97% : 300 ms

External Voltage Adjustment

  • +/-10% with 1 k ohm 1 watt trimmer
  • Increasing resistance lowers voltage
  • Fixed 15kOhm resistor enables 110V sensing

Under Frequency Protection

  • Set Point :94 -98% Hz

Unit Power Dissipation

  • 12 watts maximum

Build Up Voltage

  • 4 Volts @ AVR terminals

Quadrature Droop Input

  • 10 ohms burden
  • Max. sensitivity : 0.07 A for 5% droop 0PF
  • Max. input 0.33 A

Over Excitation Protection

  • Set point : 67 Vdc +/-3% (fixed)
  • Time delay : 10-15 seconds (fixed)

Environmental

  • Vibration : 20-100 Hz  50mm/sec, 100Hz – 2kHz  3.3g
  • Operating temperature : -40 to +70C
  • Relative Humidity 0-70C : 95%
  • Storage temperature : -55 to +80C

General specification :

The AS480 is a half wave phase controlled AVR which forms part of the excitation system of the brushless generator. The design employs Surface Mount Technology (SMT), custom mouldings and heatsinks to produce a compact AVR assembly. The AVR also incorporates an interface to the optional Excitation Boost System (EBS) for use where short-circuit current maintenance is required.

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%. The AVR voltage sensing terminals continuously sample the output windings for voltage control purpose. 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.

A frequency measuring circuit continually monitors the generator output frequency and provides under-speed protection of the excitation system. This is done 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 be changed to 60hz (or 50hz) in the field by push-on link selection.

A wide range of stability settings are available to compensate for machine sizes and applications. A ‘slow’ setting is available for applications involving single/twin cylinder engines and where lamp-flicker could be a problem.

Provision is made for the connection of a remote voltage trimmer, allowing the user fine control of the generator’s output voltage.

Operation with 110Vac sensing is possible, replace the hand trimmer link with fixed resistor. The hand trimmer option cannot be used in this configuration. The generator overload capability is reduced in 110V operation.

The AVR has the facility for droop CT connection, to allow parallel running with other similarly equipped generators.

Over excitation conditions are limited to a safe period by a protection circuit within the AVR. Once activated by a sustained over-excitation condition, the generator voltage is reduced to a low level until reset. Stopping the generator or removing power from the AVR will perform the necessary reset.

Connections are provided to interface to the optional Excitation Boost System. This incorporates a small externally mounted rotary power supply which provides excitation power in the event of heavy overloads or short circuits. The EBS is short term rated and responds to signals from the AVR to deliver excitation power when required. A separate overload protection system within the EBS electronic module protects the generator against sustained overloads.

Stamford Generator AVR AS480 Video :

 

General description :

The AVR AS440 is a half-wave phase-controlled Thyristor type Automatic Voltage Regulator and forms part of the excitation system for a brushless generator. In addition to regulating the generator voltage, the AVR circuitry includes under-speed and sensing loss protection to ensure safe, reliable control of the generator. The Propose employs surface mount technology (SMT) for high integration of features in a minute footprint AVR.

AS480 Automatic Voltage Regulator (AVR) Specification Installation and Adjustments :

Please click Stamford Generator AVR AS480 to download AS480 AVR manual for reference.

How to buy AS480 AVR for Stamford generator from us :

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