The line protection measurement and control device is a complete set of line protection devices with current, voltage protection and three-phase reclosing as the basic configuration. It is suitable for the direction line protection and measurement and control in the non-direct grounding system or the resistance grounding system of the voltage level below 66kV, which can be installed in the switch cabinet or installed in the control room.
1, Three-stage directional over-current protection blocking by compound voltage
2, Phase to phase Current Inverse Definite Minimum Time (IDMT) Limit Component (Standard inverse, Very inverse, Extremely inverse)
3, Three-stage directional zero sequence protection (independent tripping or alarm)
4,Zero sequence Inverse Definite Minimum Time (IDMT) Limit Component (Standard inverse, Very inverse, Extremely inverse)
5,Three-phase reclosing function
6, Over-current acceleration protection and zero sequence acceleration protection (pre-acceleration and post-acceleration)
7, overload component (independent tripping or alarm)
8, Under-frequency load shedding funtion
9, low voltage and overvoltage protection component
10, CT break detection
11, CT break detection
12, Control loop disconnection monitoring
13, measurement and control
1,Environmental condition
Normal temperature：-10℃~55℃
Limiting temperature：-30℃~70℃
Storage temperature：-40℃~85℃
2,Rated data
Device power supply: AC/DC 110/220V or DC24V/48V (specify when order)
DI power supply: AC/DC 110/220V or DC24V/48V outside (specify when order)
Control power supply: DC220V，AC220V，DC110V，DC48V (specify when order)
Rated AC data：
a) Line voltage 100 V
b) Incoming line voltage 100 V or 100/√3 V
c) Alternating current 5A or 1A (specify when order)
d) Rated frequency 50Hz
3, Power consumption
a) DC circuit Normal work: No more than 10W
Action: No more than 15W
b) AC voltage circuit: Not more than 0.5VA per phase
c) AC current circuit The rated current is 5A: Not more than 1VA per phase
The rated current is 1A: Not more than 0.5VA per phase
4,Main performance technology
4.1Precise working range of sampling circuit
voltage：0.005~1.2Un
current：0.08In~20In
4.2Precision of various components
current component： <±3%
voltage component： <±3%
Synchronizing angle：<±1°
time component: When 0s~2s, the error is not more than ±40ms;
When more than 2s, the error is not more than ±3%;
Frequency deviation：<±0.02Hz
Slip setting value： <±5%
4.3Power Frequency Analog Measurement Precision
The measurement and control device equipped with a special measurement submodule：
AC voltage, AC current： ≤±0.2%；
Active power, reactive power：≤±0.5%；
5,Overload capacity
AC current circuit 2 times the rated current continuous work
10 times the rated current allow to work 10s
40 times the rated current allow to work 1s
AC voltage circuit 1.2 times the rated current continuous work
Power supply circuit 80%~110% rated voltage continuous work
☆ The device adopts a new generation of high-performance 32-bit CPU, so that the stability and computing speed of the product are fully guaranteed.
☆ The acquisition module adopts 16-bit A/D converter, and the measurement and calculation indexes can easily meet the requirements.
☆ A large-capacity storage module can record up to 32 wave recording reports, recording at least 1000 events, and maintaining power failure.
☆ The high precision clock chip ensures the accuracy of the clock when the device loses power.
☆ Equipped with high-speed dual Ethernet communication interface.
☆ Careful electrical design, the whole machine has no adjustable devices, to realize the concept of debugging.
☆ High-grade, high-quality components selection.
☆ Complete self-diagnosis function.
☆ Case design with moisture, dust and vibration resistance.
