1.to integrate measuring and controlling.
2.hot sale
3.LCD screen
The YD-820 measuring and controlling integrated device integrates measuring with controlling, which is used to measure and control the main equipment in the non-direct grounding system or through small resistance grounding system with voltage 110kV or below. It has functions of tele-control, tele-metering, tele-signaling and tele-adjusting.
Measuring and controlling function
1. One group of three-phase voltage and one group of three-phase current analog input
2. One-circuit voltage analog input
3. Two circuits 4-20mA analog input
4. Place calculating and displaying the current, voltage, frequency, electrical degree, power, power factor
5. Remote event record and event SOE
6. Manual and automatic synchronizing switching operation
7. PT wire break alarm
8. CT wire break alarm
9. Logistic lock function
10. 8 sets of protective setting group
Technical parameter
Type | Name | Parameter |
Rated parameter | DC power supply | 220V or 110V |
AC voltage | 57.7V or 100V | |
AC current | 5A or 1A | |
Frequency | 50Hz | |
Power consumption
| DC current loop | ≤10W |
AC voltage loop | < 0.5VA per phase | |
AC current loop | <1VA per phase (In=5A) | |
<0.5VA per phase(In=1A) | ||
Overload capacity |
AC current loop | 2 times rated current, continuously work |
10 times rated current allowing 10s | ||
40 times rated current allowing 1s | ||
AC voltage loop | 1.1 times rated voltage, continuously work | |
DC power supply loop | 80%~110% rated voltage, continuously work | |
Work range | current | 0.05In~20In(In=5A, 10A) |
voltage | 0.4V~180V | |
frequency | 45Hz~55Hz | |
Df/dt | 0.5Hz/s~10Hz/s | |
time | 0~99.9S | |
Rated error range | current and voltage | <±3% rated value |
frequency rapid-break protection | <0.01Hz
| |
percentage differential protection | <±1% rated time+35ms | |
Protection time range
| Over-current protection | rapid-break time < 30ms at 2 times
|
Differential rapid protection | motion time < 20ms at 1.5 times rated value
| |
Percentage differential protection | <30ms at 2 times rated value; | |
Work environment
| Normal work temperature | -20°C~+50°C |
Extreme work temperature | -40°C~+70°C
| |
Relative humility | ≤95% 25°C
| |
atmosphere pressure | 80~110Kpa(below 2000m) | |
Tele-metering class | voltage, current, frequency | 0.2 class |
other elements | 0.5 class | |
tele-signaling resolution | <2ms | |
signal input way | electrical independent contact |
