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YD-850 Micro-computer Based Generator Main Protection Device/Generator Protection Relay
YD-850 Micro-computer Based Generator Main Protection Device/Generator Protection Relay
Supplier Info
[China Supplier]
Contact Person : Ms. Du Jean
Tel : 86-23-86973095
Fax : 86-23-86973092
Product Detail
1. Well received and hot sell 2. Stable operation 3. Generator protection relay 4. LED display.

    YD-850 generator main protection device integrates protecting, measuring and controlling, which is suitable for main protection for turbo-generator, hydro-generator and gas-burning generator. It has functions of tele-control, tele-metering, tele-signaling and tele-adjusting.

 

Measuring and controlling functions

1. (Complete longitudinal differential) differential quick-break protection

2. (Complete longitudinal differential) differential protection

3. Generator high-sensitivity transverse differential protection

4. Generator stator 100% grounding protection

5. zero-sequence voltage protection for generator  longitudinal fundamental wave

6. five-line delayed non-electric quantity protection

7. CT line-breaking judgment

8. PT line-breaking judgment

9. 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

  

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