 |
Operating
voltage range is ¡¾10% of rated voltage. |
|
For other voltage and/or current ratings
higher then listed on the spescification,
use |
| |
external
current transfomer and/or external potential
transformer with a 110V/5A
instrument, when ordering, specify the full
scale value desired, P.T ratio and C.T ratio |
|
Rating voltage
of 3phase 4wire is at Phase voltage.(/¡î3) |
|
When using
P.T and C.T, calibrating watts will be as
follows. |
| |
Calubrating
watt =  |
|
The standard calibration watt of the meter
for single pgase 2wire was calibrated the
|
| |
600W |
|
The standard calibration watt of the
meter for single pgase 2wire was calibrated
|
| |
the 1.0Kw as the meter for 3phase 3 wire. |
|
The standard calibration the 1000W (1.0Kw)
as the meter for 3phase 3wire. |
|
The standard calibration watt of the meter
for 3phase 3wire was calibrated the 1.0Kw.
|
|
The standard calibration watt of the
meter for 3pgase 4wire was calibrated the |
| |
1.666Kw. |
| |
The other 1) In case of 22900V |
| |
calibrating watt of 3phase 3wire : 0.961Kw |
| |
calibrating watt of 3phase 4wire : 1.666Kw |
| |
The other 2 ) In case of 380V |
| |
3phase 3wire - use to potential transfomer
ratio 380V / 110V : 1.158Kw |
| |
- not use to
potential transformer : 4.0Kw |
| |
3phase 4wire - use to potential transformer
ratio  V
/  V
: 2.0Kw |
| |
- not use to
potential transfomer : 4.0Kw |
| |
The other 3) In case of  |
| |
not use to potential transformer at 3phase
4wire : 2.0kw |
| |
When shall be catch the flow of current,
be used the ¡¾Watt Meter. |
| |
- Example(3phase
4wire) |
| |
- Full scale
of watt meter : 4000W |
| |
- P.T ratio
: 
/  V |
| |
- C.T ratio
: 100/5A |
| |
- Calibrating
watt = 
= 1.666Kw |
| ¡Ø The instrument of D-W¡à¡à¡àT
Type is self contained with the Transducer
Box. |