MEWOI MEWOI1500D, Руководство пользователя

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Clamp live wire and null line at the same time, to
measure leaker (note: total 2 wires)
Clamp the earth wire to measure the leaker of
earth wire of the tested electric equipment(note:
single wire)
Clamp the main wire to measure the total current
of main wire of the tested electric equipment(note:
single wire)
Use high voltage detector to measure the current
on low voltage wire in the places where its
indication is not easily accessible.
Please preset the automatic recording interval time for a
long-term record and monitoring of the current or leaker the
automatic recording interval time is available from 01 to 99 minutes,
it is recommended to switch off the backlight in order to reduce the
consumption of battery.
5. Test of CT ratio, polarity
【
1st
】
: the current detected by single-channel HV
detector, the primary current for CT.
【
2nd
】
: the current collected by three-channel LV
current clamp; the secondary current for CT.
【
F.Er
】
:The error between the measured CT ratio and
the preset CT ratio.
【
R, S, T
】
: indications of three phases; the in-phases
indicated on the same wire.
【 】
:the In-phase positive polarity; the phase-angle
difference is about from 0°to 25° or from 335°to 360 °.
【 】
:The in-phase negative polarity, the phase
angle difference is about from 155 ° to 205 °; the
in-phase negative polarity means that the primary
current polarity is opposite to the secondary current
polarity under in-phase voltage; the current clamp
is oppositely operated between the primary current
and the secondary current. (Both the obverse side of
HV detector and the obverse side of LV current clamp
are the in-phase terminals for current input).