Step-out device
1). Device characteristics:
It integrates protection and measurement and control functions.
The main CPU uses a high-speed DSP (digital signal processor) chip.
Provide industrial Ethernet and other ways of communication.
Integrate the standard communication regulations such as IEC60870-5-104.
Using 19264 dot matrix blue film compound liquid crystal display, the display content is rich and clear, beautiful appearance.
Both hardware and software designs are modular to easily upgrade and extend functionality.
Step-out device
2). Device parameters:
1. Rated data
AC / DC power supply: 220V, allowable deviation + 15%, -20%
AC voltage: 100V,57.7V
AC current: 5A, 1A
2. Power consumption
AC Voltage Circuit: <0.5VA / phase (at rated voltage)
AC current circuit: <0.5VA / phase (In=1A)
<1VA / Phase, (In=5A)
DC circuit: normal <15W
Trip to be <, 25W
3. Measurement grade of remote measurement
Current: level 0.2
Others: Level 0.5
4. Remote communication resolution
＜ 2ms
5. Signal input mode
passive bus
6. Simulation quantity input
After the external current and voltage input is isolated and transformed by the isolation transformer, and input by the low-pass analog filter, the CPU forms various protection relays, and various remote measurements are calculated.
Protection current through the device protection CT (generally 100A/7.07V, can be selected according to special requirements), voltage signal (UA, UB, UC, U0, etc.) through PT(150V/7.07V), converted into voltage signal, and then through low-pass filter and anti-interference device, protection circuit, operational amplifier after input to input ± 10V A / D converter, converted into digital signal into the CPU, and protected after operation.The measurement CT is separated from the protection CT, and the voltage UA simultaneously acts as an input to the frequency measurement circuit.
The voltage and flow rate of the input of each device is different, but the principle is consistent, and only the analog amount of the input is listed in the device description section.
7. Overload capacity
(1) AC current circuit: 2 times rated current working continuously; 10 times rated current working 10S; 20 times rated current working 1S.
AC voltage circuit: 1.2 times the rated voltage works continuously.
(2) Power supply circuit: 80% 120% rated voltage is working normally.
Step-out device
1. Main protection function configuration
1) Low-frequency protection; 2) Over-frequency protection;
3) Overvoltage protection; 4) Pressure loss protection;
5) PT disconnection alarm; 6) fault wave recording function.
2. Main measurement and control function
1) 14 Lu letter open collection, device remote letter change, accident remote letter.Users can set the remote information quantity name and alarm method according to the actual requirements;
2) Uab, Ubc, Uca, F simulation quantities;
3) Protection event sequence record (SOE), etc.
3. Main technical indicators
3.1 Low-frequency protection
Low weekly value: 40Hz- -50Hz time value: 0.1S-9.9S
Fixed value error: <5%, including frequency error: <0.01Hz
3.2 Overfrequency protection
Overfrequency fixed value: 50Hz- -60Hz time fixed value: 0.1S-9.9S
Fixed value error: <5%, including frequency error: <0.01Hz
3.3 Overvoltage protection
Voltage value: 1Un-1.5Un time value: 0.1S-9.9S
Fixed value error: <5%
3.4 Pressure-loss protection
Voltage value: 0.5Un-1Un Time value: 0.1S-9.9S
Fixed value error: <5%
4. Simulation input
The input analog amount is: voltage amount Uab, Ubc, Uca as overvoltage and pressure loss protection amount and measured voltage.
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