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| Customization: | Available |
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| Type: | Power Source Arrester |
| Structure: | Zinc Oxide Arrester |
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The surge protection device connector (SPD) is designed to protect low voltage overhead lines and electric equipment against over-voltages.It enables the current from the lightning to be led to the ground.
The surge protection device includes the following elements:
- An insulation piercing connector(optional).
- A L shape terminal pole connect with IPC.
- A surge protection device (Meta oxide varistor(MVO) moulded with TPU) screwed into the terminal pole.
-A disconnector mounted on the surge protection device's lower terminal
- A grounding wire connected to the disconnector.
-A safety rope that automatically releases and pulls the grounding wire via the disconnector upon surge protective device failure..
When a surge protective device (SPD) encounters a transient overvoltage (such as a lightning surge), it rapidly switches its impedance from a high-resistance state to a low-resistance state. This action diverts the surge current to the ground, thereby clamping the voltage across the protected line to a safe level (known as the residual voltage).
Conversely, if the leakage current flowing through the SPD under normal grid voltage continuously increases and exceeds 1mA (or another specified threshold), it indicates that the SPD may have degraded and requires monitoring or replacement.
When an internal short-circuit failure occurs in a surge protective device (SPD), the continuous power-frequency current from the grid passes through the disconnector, generating significant heat. This heat melts the low-temperature solder joint inside the disconnector.
The melted solder joint releases a pre-compressed spring. The mechanical energy of the spring then forcibly severs the grounding connection point between the SPD and the disconnector, completely isolating the failed SPD from both the power grid and the earth.
Simultaneously upon disconnection, the disconnector's red casing detaches and hangs down with the grounding wire under gravity. This provides a clear visual indication, allowing maintenance personnel to quickly identify the faulty SPD from a distance and promptly replace it.
Characteristic Description:
The surge protection device is used outside only.
- The maximum use altitude is 2000m.
- It can be used at a temperature going from -40°C to +70°C.
- The use frequency is 48-62Hz.
- The L shape terminal pole, the surge protection device and the disconnector are made of UV and flame resistant materials.
- It equipped with a 0.5m long, 6mm² insulated black multi-stranded grounding wire.
- Protection degree is IP67.
- Comply with IEC 61643-1 standard.
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Rated voltage |
V
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220 |
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Maximum Continuous Operating Voltage Uc
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V
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280 |
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Frequency |
Hz
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50 |
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Rated discharge current |
kA
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10 |
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Residual voltage on a surge arrester with an 8/20μs wave, 5kA |
kV
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≤1.1 |
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-Residual voltage on a surge arrester with an 8/20μs wave, 10kA |
kV
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≤1.2 |
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-Residual voltage on a surge arrester with an 8/20μs wave, 20kA |
kV
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≤1.5 |
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