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Unit configuration
The main components of the unit are grounding transformer, arc suppression coil with magnetic bias, micro computer controller and current transformer -
Operation condition
2.1. Ambient Temp: -15?~+45?
2.2. Relative Humidity: Less than 95%
2.3. Altitude: less than 2000m (if excess, please specially indicate)
2.4. No corrosive gas around the site and no conductive dust
2.5. No sever shocked movement around the site
2.6. 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
3.1. Voltage class: 6KV,10KV,35KV
3.2. Measuring error of capacitive current: less than 2%
3.3. The residual current at single-phase earth fault: less than 5A
3.4. 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 -
communication interface: RS232/RS485
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Ordering instructions
4.1. System voltage grade: 6KV, 10KV, 35KV
4.2. Arc Suppression Coil capacity
4.3. 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
4.4. The grounding transformer capacity
4.5. the quantity of zero sequence current transformer
