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To deal with
current exceeding 5A, use a 5A(1A) meter
in combination with a C.T. |
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A.C ammeter is used with a current transfomer
externally mounted, and it is noted that |
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primary current
of a current transformer and a full scale
of the meter are identical when used. |
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If the circuit voltage exceeds 500V even
when the current is less than 5A use |
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a 5A(1A)
meter in combination with a C.T to ensure
insulation. |
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The scale range of ammeter for motor circuit
is extended up to 150%~500% of rated |
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current, so
that these meters ard proteced from the
impact of the starting current and ensured
of long life. |
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Am expanded scale has the normal maximum
reading(upper limit of effective |
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measurement range) at the app. 65% point
on the scale, and the rest of it (65%~100%)
is devoted to extension reading. (tolerance
extension area :¡¾5%) |