In a power system, due to lightning surges and inductive or capacitive coupling voltages caused by the switching operation of the power system, the resulting surge may damage the transformer and the equipment connected to the lower end of the transformer. This will give power system The operation has serious consequences. Therefore, the surge protection design of the power system and the installation of a corresponding neutral point lightning protection device are necessary measures to ensure the safe operation of the equipment.
KEJIA® KDY-40N Neutral-line power surge protector is a neutral point-to-ground over-voltage protection device for power voltage transformers. It is designed and manufactured according to IEC and other relevant lightning protection standards, has no freewheeling, low residual voltage, and steep wave It has the advantages of rapid response, small discharge dispersion, and the ability to absorb various lightning and operating overvoltages.
1,Remote signal contact
2,Standard modular installation
3,Pluggable replacement lightning protection module
4,Failure detection indication
Nominal voltage Un : 100VAC
DC breakdown voltage Uagn: 1400V DC ±20%
Rated discharge current In : 20kA (8/20μs)
The maximum discharge current Imax: 40kA (8/20μs)
Voltage protection level Up: ≤2kV
With remote signaling contacts: 1 set of normally open contacts (1,2), 1 set of normally closed contacts (2,3)
Upper lead L/N: ≥4mm2
Lower lead PE : ≥6 mm2
Installation method: 35mm DIN rail, EN60715 standard
Shell flammability rating: V0 level
When installing, the sum of the short-circuit current peaks must conform to the specified protection level.
Before performing system insulation measurements, remove the protective plug. Otherwise, the measurement result may not be accurate. After completing the insulation measurement, plug the plug back into the device.
This SPD is a non-maintenance-free product. After installation, it needs to be maintained from time to time to confirm that it is in normal working condition.
When the lightning protection device is working normally, the transparent window is green. When the window turns red, it indicates that the neutral point power supply lightning arrester has failed, and it is necessary to replace the new product in time.
Dimensional drawing (unit: mm)