1.Safe and reliable
2.Has functions of tele-control, tele-metering, tele-signaling and tele-adjusting
3.LCD screen display.
The YD-810 capacitor monitoring and protecting device integrates protecting, measuring and controlling, it is suitable for 110kV or below grounding capacitor bank which is non-direct grounding or through small resistance grounding system. It has functions of tele-control, tele-metering, tele-signaling and tele-adjusting.
Measuring and controlling function
1. Differential bridge voltage protection (B type YD-811)
2. Differential bridge current protection (C type YD-812)
3. Two-stage definite time over-current protection
4. One-stage high sensitive current instantaneous trip protection
5. Over voltage protection
6. Low-voltage protection
7. Voltage automatic switching
8. Unbalanced voltage/zero sequence voltage protection
9. Unbalanced voltage/zero sequence current protection
10. Zero sequence over-current protection(sensitive resistor grounding system)/sensitive current grounding protection
11. Three line non electric quantity protection (capable of selecting tripping or warning/alarm)
12. 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 |
