MEWOI MEWOI1500D, Руководство пользователя

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CT ratio
Three kinds of transformation ratio indications :
(1)convert the transformation ratio based on the
adjustable basic value of 5A for secondary circuit
current; (2)convert the transformation ratio based on
10kV-YY of 10kV/380V, that means 1st means the
current of the line under 380V, 2nd means the
secondary circuit current of CT under the 380V, and
then calculate the ratio between the 10KV line and the
secondary circuit;
(3)the measured current ratio can be calculated by the
measured CT ratio between the primary and secondary
circuit.
Reference
Range
Reference range of transformation: 0.00A ~ 99.99A, the
default secondary circuit current is transformed to 5A;
Range of Ratio
error
(F.Er)
0.0% ~ 9.9%, the error between the measured CT ratio
and the preset CT ratio
Range of CT
ratio
0000
～
9999/0.0A
～
9.9A
Range of Ratio
error
0.0%
～
9.9%, the principal machine can sound a alarm
of “beep - beep – beep” if the measured value is more
than the preset error.
Phase polarity
Symbol indicated for in-phase positive polarity
Symbol indicated for in-phase negative polarity
Indication of
Phase
Sequence
Cursor in clockwise rotation and
“Positive Phase”
indicated for positive phase sequence
Cursor in counterclockwise rotation and
“Negative
Phase” indicated for negative phase sequence
Indication of
Error
Symbol “Error” indicated if the tester can’t identify the
phases, polarity, and phase sequence properly;
Data Storage
1500 sets of dada memory; press the Left arrow key to
select data, and to save and auto-number the selected
data (the good condition of data available under
power-down or battery replacement)
Automatic
Recording
Interval Time
From 00 minutes to 99 minutes, the tester stops
automatic record if being set to 00 minutes; the principal
machine doesn’t shut down automatically if being set
from 01 minutes to 99 minutes.