3213A
Insulation Tester
3213A
177xlO5X55mm 7OOg
Summary of Improvements
The rated measuring voltage can be applied to a low-resistance range. This allows Model 3213A to meet German product standard VDE0413.
Safety features are improved (e. g., double shielding, a withstanding voltage of 370OV, and an error-input protection circuit). These model changes were based on the IEC 1010 with respect to safety.
Features
The exterior design of Model 3213A follows completely that of the earlier Model 3213, which has been a best seller.
·Improved output voltage stability
·Five models that cover the rated voltage range from 100 to 1000 V
·Equipped with a guard terminal
·Voltage measurement of line power supply possible
·Integrated line-and-earth-lead probe
·Battery check function meets Japanese Industrial Standards (JIS C 1302-1994)
The criteria for insulation quality are determined by the insulation resistance and the minimum rated value of the leakage current.
Insulation resistance is generally measured under conditions similar to actual working conditions. However, the voltage which can be applied to the terminals may be less than the rated voltage due to a considerable degree of deterioration of the insulation surrounding the object being measured. This is because, in a measuring instrument, an internal resistance which becomes greater than the resistance of the object prevents the measuring current from having sufficient intensity. Therefore, it is requisite that the measuring conditions be correctly reviewed and understood to judge the measurement if the insulation has deteriorated. The resistance-voltage characteristics of the 3213A are shown in the figure below. As shown in these characteristic curves, the 3213A assures that voltages can be applied in measurements of objects with low resistance due to deterioration.
W.E.I. Inc. |
Company Overview |
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W.E.I. Inc.
107 Baker Street
Syracuse, New York 13206
Phone: 315.437.4281
Fax: 315.437.4296
E-Mail: wei@traknet.com