CHINT DTSU666 Series 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 Series Specifications

General

Type	Three-phase electronic energy meter
Rated Current	5A
Starting Current	0.004Ib
Frequency	50/60Hz
Display	LCD
Mounting	DIN rail
Operating Temperature	-25°C to +55°C
Storage Temperature	-40°C to +70°C
Protection Level	IP51
Rated Voltage	3x230/400V
Communication	RS485
Weight	0.5 kg
Standards	IEC 62052-11
Accuracy Class	0.5S
Humidity	<95% non-condensing