YD-845 Micro-computer Based Bus-bar PT Monitoring & Measuring Device/Busbar Relay Protection, China Suppliers and Manufacturers

YD-845 Micro-computer Based Bus-bar PT Monitoring & Measuring Device/Busbar Relay Protection

Supplier Info

Chongqing Yueda Electric Equipment Co., Ltd.

[China Supplier]

Contact Person : Ms. Du Jean

Tel : 86-23-86973095

Fax : 86-23-86973092

Product Detail

1.easy operation performance 2.bus grounding alarm 3.busbar over-frequency and low-frequency protection

YD-845 micro-computer based bus-bar PT monitoring & measuring device integrates monitoring, measuring and controlling functions, which can be used to detect and control the voltage transformer of power plant, substation busbar with voltage 110kV and below. It has functions of tele-control, tele-metering, tele-signaling and tele-adjusting.

Measuring and controlling function

1. II level busbar compound voltage output

2. II level busbar voltage-loss output

3. II level busbar over-voltage output

4. II level busbar PT harmonic-elimination output

5. II level busbar PT primary side wire-breaking alarm

6. II level busbar PT secondary protection side wire-breaking alarm

7. II level busbar PT secondary measurement side wire-breaking alarm

8. II level busbar low-frequency protection

9. II level busabr over-frequency protection

10. II level busbar grounding alarm

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)
	AC current loop	<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