Voltage Regulators

Model AVR380

This solid state device is designed to control the output voltage of 50 or 60 Hz. AC alternators ensure a stable voltage output is maintained under all load conditions. Directly replaces the Dunlite UVR 100 but will also electrically replaces almost all known voltage regulators. It is suitable for both 3Ø and 1Ø machines with or without separate excitation. Parallel operation of machines is also possible with only the addition of a quad droop input signal.

Features

• Transformer isolated voltage sensing input.
• Four selectable input sensing voltage levels.
• Volts per Hz characteristic to protect prime movers on large step loads
• Field current overload sensing and shutdown with opto isolated remote indicator output.
• Remote adjustment facilities.
• On board field output fuse.
• Optional crowbar overvoltage sensing and protection facilities.
• Open PC board construction for economic repairability.
• Improved reliability by use of PC board plated through hole and underrated component selection.
• Practical adjustment range for each voltage level.
• Field excitation powered from the  sensing voltage input
• On board potentiometers for :
• Voltage.
• Stability coarse and fine
• Underspeed / voltage droop point.
• Field excitation overload.
• Overvoltage (if fitted)
• Quad droop input facilities.

Note : Specifications can change without notice.

Electrical Specifications

• Voltage sensing ranges 120,208,240 & 415Vac.
• Voltage sensing frequency 50 or 60Hz.
• On board voltage adjustment range + - 10% of each range.
• Maximum field current 10A
• Maximum field voltage 212Vdc.
• Field excitation switching SCR 50A 1600V
• Regulation + - 1%, with engine governing to class A ISO3046.
• Underspeed adjustment range 10 - 55Hz
• Underspeed shutdown time delay 15 - 20secs approximately.
• Minimum residual  voltage for reliable excitation 3/5 volts.
• Minimum field resistance required 3/5 ohms
• Remote adjustment potentiometer 5K ohms 2W.
• Quad droop input requirements 5A 10va.

Mechanical Specifications

• Weight: 0.71kg
• Operating Environment Temperature: -10^oC to 70^oC 
• Vibration : 4gs. from 20 - 500 Hz
• Shock: 1M drop test
• Mounting: Folded aluminium surface mount cast
  

Model AVR 400

This solid state device designed to control the output voltage of 50 or 60 Hz. AC alternators ensure a stable voltage output is maintained under all load conditions. Directly replaces the Dunlite SR101A but will also electrically replace almost all known voltage regulators. It is suitable for both 3Ø and 1Ø machines with or without separate excitation and is especially good on 1Ø machines in reducing light flicker due to its increased stability adjustment range.

Features

• Two selectable input sensing voltage ranges.
• Volts per Hz characteristic to protect prime movers on large step loads.
• Field current overload sensing and shutdown.
• Remote adjustment facilities.
• On board field output fuse.
• Open PC board construction for economic repairability.
• Improved reliability by use of PC board plated through hole and underrated component selection.
• Practical adjustment range for each voltage level.
• Field excitation powered from the  sensing voltage input.
• On board potentiometers for :
• Voltage
• Stability coarse and fine
• Underspeed voltage droop point
• Field excitation overload

 Note : Specifications can change without notice.

Electrical Specifications

• Voltage sensing ranges 120,208 and 240 to 415Vac.
• Voltage sensing frequency 50 or 60Hz.
• On board voltage adjustment range + - 10% of each range.
• Maximum field current 10A.
• Maximum field voltage 212Vdc.
• Field excitation switching SCR 50A 1600V.
• Regulation + - 1%, with engine governing to class A ISO3046.
• Underspeed adjustment range 10 - 55Hz.
• Underspeed shutdown time delay 15 - 20secs approximately.
• Minimum residual  voltage for reliable excitation 3/5 volts.
• Minimum field resistance required 3/5 ohms.
• Remote adjustment potentiometer 5K ohms 2W.

Mechanical Specifications

• Weight: 0.4kg
• Operating Environment Temperature: -10^oC to 70^oC 
• Vibration : 4gs. from 20 - 500 Hz
• Shock: 1M drop test
• Mounting: Folded aluminium surface mount cast

Model GX340

The GX340 is a solid state device designed to give accurate and stable voltage regulation of AC alternators regardless of prime mover types and ensures a stable voltage output is maintained under all load conditions. Directly replaces the Stamford Series 3 and 4 Regulators but will also electrically replace almost all known voltage regulators. It is suitable for both 3Ø and 1Ø machines with or without separate excitation. Parallel operation of machines is also possible with this device with only the addition of a quad droop input signal.

Features

• Transformer isolated voltage sensing input voltage sensing input.
• Volts per Hz characteristic to protect prime movers on large step loads
• Field current overload sensing and shutdown.
• Remote adjustment facilities.
• Open PC board construction for economic repairability.
• Improved reliability by use of PC board plated through hole and underrated component selection.
• Practical voltage adjustment range.
• Field excitation powered from the  sensing voltage input
• Suitable for use with permanent magnetic excitation.
• On board potentiometers for :
• Voltage
• Stability coarse and fine
• Underspeed / voltage droop point
• Field excitation overload.
• Quad droop input facilities.
• Increased stability range to overcome light flicker on 1f machines.

Note : Specifications can change without notice

Electrical Specifications

• Voltage sensing range 170 to 280Vac.
• Voltage sensing frequency 50 or 60Hz.
• On board voltage adjustment range + - 10%.
• Maximum field current 10A.
• Maximum field voltage 140Vdc.
• Field excitation switching SCR 25A 1000V
• Regulation + - 1%, with engine governing to class A ISO3046.
• Underspeed adjustment range 10 - 110Hz
• Underspeed shutdown time delay 15 - 20secs approximately.
• Minimum residual  voltage for reliable excitation 3/5 volts.
• Minimum field resistance required 3/5 ohms.
• Remote adjustment potentiometer 5K ohms 2W.
• Quad droop input requirements 5A 10va.