CHINT DTSU666-CT User Manual

DTSU666 series and DSSU666 series
three phase electronic energy meter
ZTY0.464.1448
User manual
Page 5, Total 21
operated rate based on time and time rate, then adding the energy read from the metering chip to the
corresponding quadrant energy and total energy based on the rate and quadrant, at the same time,
calculating the corresponding combined energy based on the energy combination mode, and then store
and backup the energy.
The management MCU drives LCD module to display and exchange data with the outside through
RS485 communication interface.
3. Main Technical Performance & Parameters
3.1. limit of error caused by the current augment
Table 2 The limit value of the active percentage error of meters on balanced load
type
Range of current
Power factor
Percentage error limit of various grade
instruments（%）
0.5S
Class 1
Class 2
Access via
current
transformer
0.01I
n
≤I＜0.05I
n
1
±1.0
±1.5
±2.0
0.05I
n
≤I≤I
max
1
±0.5
±1.0
±1.2
0.02I
n
≤I＜0.1I
n
0.5L、0.8C
±1.0
±1.5
±2.0
0.1I
n
≤I≤I
max
0.5L、0.8C
±1.0
±1.0
±1.2
Direct access
instrument
0.05I
b
≤I＜0.1I
b
1
-
±1.5
±2.0
0.1I
b
≤I≤I
max
1
-
±1.0
±1.2
0.01I
b
≤I＜0.2I
b
0.5L、0.8C
-
±1.5
±2.0
0.2I
b
≤I≤I
max
0.5L、0.8C
-
±1.0
±1.2
Remark
I
n
：secondary rated current of the current transformer; I
b
：calibrated current of
the meter;
L:inductive；C：capacitive；
Table 3 The limit value of the reactive percentage error of meters on balanced load
Current value
sinφ
（inductive or
capacitive ）
Percentage error limit of various
grade instruments（%）
Direct access instrument
Access via
transformer
2
0.05I
b
 I  0.1I
b
0.02I
n
 I  0.05I
n
1
2.5

CHINT DTSU666-CT Specifications

General

Brand	CHINT
Model	DTSU666-CT
Category	Measuring Instruments
Language	English