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Keywords:ROCKVILLE,MARYLAND,Vectrol,January 22, 1973
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ROCKVILLE, MARYLAND
Vectrol Inc.
January 22, 1973
H. Tracy Hal 1 , Inc. c/o J. Martin Neil 166B Eatoncrest Drive Eatontown, New Jersey
Dear Mr. Neil:
Thank you for your interest in our power control product line. I would like to suggest a model VPAC613-208-15A for your application which contains the following features:
OUTPUT:	63 amperes @208VAC
INPUT:	0-5VDC feedback signal
CONTROL:	Externally mounted potentiometer to set
desired output level.
FIRING MODE: Phase Angle Firing SOFT START
Voltage Regulation Amplifier
The current limit option is not required to maintain the control you are looking for; however, you may want to add that function for protection. If you anticipate the possibility of shorting on the secondary you will have the ability to limit current flow to something less than nameplate rating. The response time of the current limit circuit is a maximum of one cycle. The SCR devices will be subjected to a maximum of one cycle surge current due to occasional shorting before current limit takes hold and phases back the output.
On initial start-up the soft start function will gradually increase the output signal over a j second period. If a short occurs at start up the combination of soft start and current limit will prevent the SCR devices from seeing any current surge at all.
Mr. Neil, I believe our VPAC613 is very well suited to your application and will provide the regulation you require. Our delivery time at present is approximately six weeks and the price schedule is as follows:
January 22, 1973
H . Tracy Hall, Inc.
J. Mart i n Neil
Thank you again for your interest. If we may offer additional assistance, please call on us. We look forward to placing your order in the immediate furture.
Very truly yours
VECTROL, INC.
Wi11 iam J. Strayton
GOULD
September, 1972
A-C Watt Converter
Measures 3 phase or single phase A-C power.
Connects directly into 480 Volt industrial circuits.
Calibrated D-C output is proportional to forward or reverse power flow.
Accurate within 1% over wide range of environmental conditions.
Fast response — less than 25 millisec to a step input.
Computes true A-C power.
No operating controls; can be installed remotely.
A-C Watt Converter
Specifications
Input Voltage
Rated.......................... 480 volts, rms
Maximum Continuous............. 750 volts, rms
Input Current
Rated.......................... 5 amps, rms
Maximum Continuous............. 10 amps, rms
Transients (5 seconds max)......... 50 amps, rms
Input Impedance
Current........................ Less than 0.1 ohm
Voltage........................ Approx. 40,000 ohms
Input Frequency.................... 50 to 60 Hz
Conversion Technique............... 2-element Hall Effect transducer
Power Factor (leading or lagging)....... 1 to 0.5
Output Voltage, Rated............... +5.0 volts d-c into 50K ohms
Output Polarity..................... (+) for forward a-c power flow (-) for reverse a-c power flow
Output Ripple (peak to peak).......... Less than 1.0% full scale
Internal Controls
Position........................ +2.5% full scale
Span........................... +10% full scale
Response Time (0 to 90%)............ 25 millisec.
Nonlinearity....................... Less than 1% full scale
Dielectric Test, all circuits to case....... 1500 volts, rms
Temperature, Rated Ambient.......... 68°F to 86°F
Temperature Instability (20°F to 140°F). Output changes less than 1% full scale. Output Impedance.................. 5000 ohms
Power Requirements................. 120 volts +20%, 50-400 Hz, 2 watts
Dimensions, Basic Enclosure........... 6" w x 8" h x 8" d
(15.2cm x 20.3cm x 20.3cm)
Weight........................... Less than 5 lbs. (2.3 kg)
Input Circuits (5.0 V output).......... 3 phase, 480 V, 3 wire, unbalanced
3 phase, 480 V, 3 wire, balanced 1 phase, 480 V, 2 wire
Input Circuits (2.5 V output).......... 3 phase, 240 V, 3 wire, unbalanced
3 phase, 240 V, 3 wire, balanced 1 phase, 240 V, 2 wire
Rated Power Inputs
3 phase, 3 wire, 480V, 5 amps....... 5000 watts
1 phase, 2 wire, 480V, 5 amps....... 2500 watts
3 phase, 3 wire, 240V, 5 amps....... 2500 watts
1 phase, 2 wire, 240V, 5 amps....... 1250 watts
High Current Inputs................. From 10 to 1500 amps with external current transformers
I I
GOULD BRUSH