CHINT DTSU666-CT User Manual

DTSU666 series and DSSU666 series
three phase electronic energy meter
ZTY0.464.1448
User manual
Page 6, Total 21
0.1I
b
 I  I
max
0.05I
n
 I  I
max
1
2.0
0.1I
b
 I  0.2I
b
0.05I
n
 I  0.1I
n
0.5
2.5
0.2I
b
 I  I
max
0.1I
n
 I  I
max
0.5
2.0
0.2I
b
 I  I
max
0.1I
n
 I  I
max
0.25
2.5
Table 4 The limit value of the active percentage error of meters on imbalanced load
Current value
Power factor
Percentage error limit of various grade
instruments（%）
Direct access
instrument
Access via
transformer
0.5S
Class 1
Class 2
0.1 I
b
 I  I
max
0.05I
n
 I  I
max
1
±0.6
±2.0
±3.0
0.2I
b
 I  I
max
0.1I
n
 I  I
max
0.5L
±1.0
±2.0
±3.0
Table 5 The limit value of the reactive percentage error of meters on imbalanced load
Current value
Current value
Percentage error limit of various
grade instruments（%）
Direct access
instrument
Direct access
instrument
Class 2
0.1 I
b
 I  I
max
0.05I
n
 I  I
max
1
±3.0
0.2I
b
 I  I
max
0.1I
n
 I  I
max
0.5
±3.0
3.2. Start
Under the power factor of 1.0 and started current, the instrument can be started and continuously
measure (for multiple phase instrument, it will bring balanced load). If the instrument is designed
based on measurement for dual directional energy, then it is applicable for each direction of energy.
Table 6 start current
instrument
Instrument rating
Power factor
0.5S
1
2
Direct access instrument
-
0.004I
b
0.005I
b
1
Access via CT
0.001I
b
0.002I
b
0.003I
b
1
3.3. Defluction
When adding voltage while there is no current on the current circuit, the test output of the
instrument shall not produce another pulse. When testing, the current circuit shall be opened, and the

CHINT DTSU666-CT Specifications

General

Brand	CHINT
Model	DTSU666-CT
Category	Measuring Instruments
Language	English