Star DTS27 - Technical Specification; Operating Principle

Operation Manual of DTS27 Three-phase Energy Meter
4
BS7856:2013 Code of practice for special design and other features of alternating current watt-hour
meters for active energy
1.2 Technical specification
1.2.1 Technical parameters of meter
Rated voltage (Un)
3*230V/400V
Ib(Imax) Current
10(100)A
Rated frequency
50Hz
Accuracy class
Active: 1.0
Reactive: 2.0
Impulse constant
Active: 1000imp/kWh
Active: 1000imp/kvarh
1.2.2 Electrical properties
Operating voltage range
0.8Un-1.2Un
Starting current
0.004Ib for active
0.005Ib for reactive
Operating frequency range
45Hz-55Hz
Power consumption
Voltage circuit ≤1.5W, 4VA
Current circuit ≤0.5VA
1.2.3 Insulation properties
No.
Item name
1
Impulse voltage
Insulation of protective class II
6kV
2
AC voltage
Between current circuit and
the earth (insulation of protective
class II class II)
4kV
1.2.4 Applicable environment
No.
Item name
1
Temperature
Operation temperature range
-25℃…55 ℃
Limit range of operation
-40℃…70℃
Limit range for storage and transport
-40℃…80℃
2
Humidity
Annual mean in tropical conditions
≤75％
For 30 days, these days being spread in a
natural manner over one year
≤95％
Occasionally on other days
≤85％
1.3 Operating principle
The meter is composed by the measurement & main control circuit module that is made up of single chip
microcomputer and metering chip, the memory circuit module that is made up of memory chip, the power supply
circuit module, cover open detection module, LCD display of user information display module, and optical
communication circuit module.
The system structure as below: