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Automatic Voltage Regulator Stanford-mx341

Posted at: Offers to Sell and Export | Posted on: Fri 10 Jul, 2009 8:33 am | Product Category: Voltage regulator [95]
voltage regulator stanford mx341
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Stamford AVR MX341

Product Description

Mx341 general description

The MX341 is a two phase sensed

Automatic Voltage Regulator (AVR) and forms part of the excitation system for a brushless generator.

In addition to regulating the generator voltage, the AVR circuitry includes protective features to ensure safe reliable control of the generator. Excitation power is derived from a permanent magnet generator (PMG) to guarantee low Radio Frequency Interference (RFI) and immunity from thyristor type loads.

The AVR is linked with the main stator windings and controls the power fed to the exciter stator and hence the main rotor to maintain the machine output voltage within the specified limits, compensating for load, speed, temperature and power factor of the generator.

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 underspeed protection of the excitation system by reducing the generator output voltage proportionally with speed below a presettable threshold. A further enhancement of this feature is an adjustable volts/Hz slope to improve frequency recovery time on turbo charged engines.

Uncontrolled over excitation is limited to a safe period by internal shutdown of the AVR output device. This condition remains latched until the generator has been stopped.

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

Accessories are available for this AVR. Please refer to factory for further details.

Technical specification

Sensing input

Voltage: 170~250 V ac max

Frequency: 50~60Hz nominal

Phase: 2

Wire: 2

Power input (pmg)

Voltage: 140~220V ac

Current: 3A/phase

Frequency: 100~120 Hz nominal

Phase: 3

Wire: 3


Voltage: Max 120 V dc

Current: Continuous 2.7A

Transient 6A for 10 seconds

Field Resistance: 15 Ohm minimum

REGULATION (See Note 1) +/- 1%

Thermal drift

(after 10 min)

1% for 40o C change in AVR ambient

Soft start ramp time

3 seconds

Typical system response

Field current to 90% 80ms

Machine Volts to 97% 300ms

External voltage adjustment

+/- 6% WITH 1K Ohms trimmer

Under frequency protection

Set Point: (See note 2) 95% Hz

Slope: 100-300% down to 30Hz

Untit power dissipation

12 watts maximum

Accessory input

+/- 1v = +/- 5% change in output volts

Quadrature droop

Maximum sensitivity (10 Ohms Burden)

0.07A for 5% droop @ 0p. F.

Over excitation protection

Set Point: 75 V dc

Time Delay ( fixed): 10 seconds


Vibration: 20-100Hz 50mm/sec

100Hz-2 kHz 3.3g

Relative Humidity: 0-60o C 95%

Operating Temperature: -40o C to +70o C

Storage Temperature: -55o C + 80o C

Company Contact:

No member photo
Contact Name: Xuesong Zhou
Company Name: Chongqing Kang Famous Commerce Co., Ltd.
Email: Email
Tel: 86-023-65017500
Mobile: 15178817249
Fax: 86-023-65017059
Street Address: The Lettuce Groove
Industrial Park, Tongjiaqiao Street,
Martyrs Tomb Road, Shapingba Of
Chongqing, China
Website: http://www.cqkms.com
Member name: cqkms
Country: China-CN China
Member Since: 03 February 2009
Total Leads: 52 cqkms Import Export Business Leads
Business focus: Cummins Overhaul Accessories, Assembly Parts, Filter, Crankshaft, Connecting Rod, Fuel Injection
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Product Category: Voltage regulator [95]

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