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CET Electric Technology
Appendix C - Technical Specifications
Main Voltage Inputs (V1, V2, V3, VN)
Standard (Un)
Range
PT Ratio
Mains I/II-Primary
Mains I/II-Secondary
Overload
Burden
277VLN / 480VLL
10% to 120% Un
1-1,000,000V
1-480V
2xUn continuous, 4xUn for 1s
< 0.05VA @ 277VLN per phase
Frequency
45-65Hz
Mains Current Inputs
I Nominal (In)
Range
Starting Current
CT Ratio
Overload
Burden
5A / 1A (CT rated Input)
1% to 120%
0.3% of In
6000 max. for 5A, 30000 max. for 1A
1.2xIn continuous, 10xIn for 1s
<0.3VA per phase
Power Supply for Main Unit (L+, N-)
Standard
Burden
95-277VAC/DC, ±10%, 47-440Hz
<6W
Branch Inputs
CT Ratio
Burden
Starting Current
Solid-Core CT Strip
100A
5A
Split-Core CT
100A
200A
400A
800A
400 Max.
<0.05VA per phase
0.2% Imax
In=100A, Imax=100A, Range= 0.2-100A
In=5A, Imax=10A, Range= 0.05-10A
In=10A, Imax=120A, Range= 5-120 A
In=200A, Imax=240A, Range= 10-240A
In=400A, Imax=480A, Range= 20-480A
In=800A, Imax=960A, Range= 40-960A
Digital Inputs
Type
Sampling
Debounce
Dry contact, 24VDC internally wetted
1000Hz
1-9999 ms programmable
Relay Outputs
Type
Loading
Form A Mechanical Relay
5A @250VAC / 30VDC
RTD Input
Type
Range
PT100
-40 to 200 °C
Environmental conditions
Operating Temp.
Storage Temp.
Humidity
Atmospheric Pressure
Pollution Degree
Overvoltage Category
-25°C to +70°C
-40°C to +85°C
5% to 95% non-condensing
70 kPa to 106 kPa
II
CAT III
Mechanical Characteristics
Enclosure
Unit Dimensions
IP Rating
Galvanized Steel
260.5*154*55.5
50