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Characteristics
of electric wireless checking system:
1. Measure the integrative errors of the whole measurement
circuit, on the basic of no- el-
ectricity stop and no-touch
to high voltage wire and no-open to measurement
box;
2. Able to check out breakdown of PT and CT measurement
circuit and PT & CT second circuit,
as well as the change
and damage of transformer according to integrative
errors and ele-
ctric parameter;
3. According to the integrative errors and electric
parameter, it is able to judge whether
user is using electricity
in illegal ways and calculate how much electricity
he has used.
4. Each part inside this system utilizes wireless
telecommunication ways to connect them t-
ogether, which makes
users not limit to the installation places of transformer,
measure-
ment box, PT, CT and
so on. The telecommunication distance should be
less than 2 Km from
down town;
5. Any extension machine among 1-6 devices is able
to be set as main machine. And the main
machine can imitate simultaneously
the other extension machines¨ active and reactive
p-
ower;
6. Several individual machines are able to be set
as different units, no disturb between t-
hem in short distant
use.
Characteristics of individual extension
machine (main machine):
1. Show on high-brightness, high-definition, high
resolution ratio liquid crystal display;
2. The system uses high-speed,high-accuracy digital
multiplier to measure all parameters s-
uch as active (reactive)
power, voltage, current, frequency, phase etc and
calibrates all
parameters through software;
3. Guarantee the worst case accuracy (＼0.5%, ＼0.2%,＼0.1%)
of electric measurement between
the temperature of -20≧to
40≧;
4. Wide range current input, equipped with several
kinds of transformer (5A,100A,500A,1000A);
5. Input voltage: 30~480V;
6. Working electric source: 80~260V; when reaches
380V, it will make over voltage protection;
7. Identify three-phase three wire wrong connection,
and show three phase vector diagram;
8. Able to measure 2nd ~21st harmonic wave of three-phase
voltage and current;
9. Show the waveforms of three voltage and three
current simultaneously;
10. Provide error calibration function for users
to compare accuracy of system at any time;
11. Can update software via PC or Model;
12. Each machine can be set as extension machine
as well as main machine;
13. The main machine is able to show power and electric
energy of the other six extension m-
achines simultaneously;
14. Able to measure CT rate ratio;
15. The checking results can be delivered to computer. |
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Wireless
Telecommunication Standard:
Individual Machine Technical Standard:
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