Overview

In power system of 6-66KV, when capacitive current associated with single phase ground fault excess 10A (It is 30A in 6-10KV cable circuit system), arc suppression coil device should be adopted to prevent arc grounding, remove earth fault and improve power supply quality.

MRD-XHZ Arc-Suppression Coil with Adjustable Tuning Compensation Device employs standard industrial computer system, bus-organization, multilayer PCB and full-color LCD screen to provide system with stable operation, visual display, strong anti-interference capability, perfect parameter settings and information query function.

MRD-XHZ Arc-Suppression Coil with Adjustable Tuning Compensation Device adopts 6-110KV voltage grade and is widely used in transformer substations of large factories and mines.

Features

1.       Controller adopts industrial computer platforms, dual-CPU framework and multilayer PCB processing to ensure stable and reliable operation

2.       With full-color LCD screen, the running state, system capacitive current, neutral voltage, neutral current, out-of-resonance degree, residual current and fault-times of single-phase can be displayed, set and inquired conveniently

3.       The adjusting range is wide, between 0-100% rated current and also accurate and quick

4.       Embedded high voltage grounding line selection module employs residual incremental method and active power method making the line selection accurately and quickly

5.       Equipped with RS232 and RS485 communication interface, our product can communicate with supervising computer to achieve signal teleportation

6.       Our product can realize acoustic alarm of single-phase earth fault

7.       Equipped with standard parallel printer, our product can finish data printing and ground information printing

8.       Our product possess one system controlling two sets device function, namely, two sets of arc suppression coil in the same system can transform automatically along with the system operation

Unit configuration

1.       Grounding Transformer

2.       Arc suppression coil with adjustable turns

3.       Load switch

4.       Micro-computer controller

5.       Thyristor(SCR) and trigging device

6.       Disconnect or\

7.       Damping resistor

8.       Voltage transformer

9.       Zinc oxide lightning rod

10.   High-voltage current limiting fuse

11.   Cabinet( indoor or outdoor)

12.   control panel

13.   Small current earthing wire line

Operation conditions

1.       Ambient Temp: -15℃～+45℃

2.       Relative Humidity: Less than 95%

3.       Altitude: less than 2000m (if excess, please specially indicate)

4.       No corrosive gas around the site and no conductive dust

5.       No sever shocked movement around the site

6.       Micro-computer controller screen is to be installed in master control of the station. Grounding transformer, ASC device and damping resistor are to be installed outdoor or indoor with good ventilation

Technical performance index

1.       Voltage class: 6KV,10KV,35KV

2.       Measuring error of capacitive current: less than 2%

3.       The residual current at single-phase earth fault: less than 5A

4.       Fault response time less than 20ms

a)         Controller power requirement: A Alternating current 220V, rated frequency 50Hz

                             A Direct current 220V/110V, rated frequency 50Hz

5.       communication interface: RS232/RS485

Ordering data

1.       System voltage grade: 6KV, 10KV, 35KV

2.       Arc Suppression Coil capacity

3.       The capacity of arc suppression coil is determined according to the size of the capacitive current under the single-phase grounding fault and should have a certain margin

4.       The grounding transformer capacity

5.       the quantity of zero sequence current transformer

Attention!

Please ensure good grounding system of the device and make different access to the ground network for the cabinet and the device. In dry areas, the ground network resistance should be measured regularly to make sure the ground resistance less than 4Ω to prevent burning loss.