Square D 450R Voltage Transformer

Manufacturer: Schneider

Voltage Transformers (VT) Circle Diagrams are provided as an easy method for determining accuracy at any burden and power factor. The radial lines represent different power factors for the burdens and the concentric circles represent burden amount in Volt-Amperes.

VT accuracy at a specific burden may be determined by choosing the appropriate power factor line that represents the power factor of the actual burden, then extending outward in the radial direction to the appropriate volt-ampere level. Note that the concentric circles represent proportional Volt-Amperes that increase in value as you extend outward.

The Ratio Correction Factor and Phase Angle error for this Burden may be taken from the ordinate and abscissa of the circle diagram.

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Features Model

These voltage transformers are designed for line-to-line or line-to-ground connection on the primary voltage indicated. See the table below to determine the applicable configuration for proper system voltage indication.
Model 450R is designed for switchboard use. This model features high accuracy and burden capacity for excellent performance in metering and indication.
Model 460R is a compact, lightweight design, providing exceptional performance in electrical indicating and recording instrumentation.
Model 470R is designed for extremely accurate voltage measurement where low burden is to be used.
Permanent polarity marks are molded into the case.
Large, easy-to-read ratios are clearly marked on the case.
Primary and secondary terminals are fully insulated #10-32 threaded studs, complete with nuts and washers. Terminal covers and mounting base are also supplied.
Frequency: 60 Hz.
Insulation: 10 kV BIL full wave (600 volt class)
Applicable Standard — ANSI C57.13.
UL recognized per Classification XODW2.

Mfr. Part No.	Description
450R-120	Primary Voltage Rating (Volts), 120
450R-240	Primary Voltage Rating (Volts), 240
450R-288	Primary Voltage Rating (Volts), 288
450R-300	Primary Voltage Rating (Volts), 300
450R-480	Primary Voltage Rating (Volts), 480
450R-600	Primary Voltage Rating (Volts), 600

Square D 450R Voltage Transformer

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