Surge Protective Deviceapplicable Fields
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Applicable fields
Photovoltaic system
As the PV array is mostly installed in the open air, the risk of direct lightning strike is high, which not only has a direct impact on the PV panel, but also has an indirect surge impact on the PV module, combiner box and inverter, and even has a double impact on the signal line. Therefore, appropriate surge protectors must be installed on the combiner box, both sides of the PV inverter, the main switchboard and the signal line.
- Junction box of photovoltaic array: In the roof photovoltaic system with non-isolated lightning protection system ( LPS ), if LPV ( distance from photovoltaic array to photovoltaic inverter ) > 10m and LAC ( distance from photovoltaic inverter to main switchboard ) > 10m, it is applicable to photovoltaic DC T1 SPD; if LPV < 10m and LAC < 10m, it is unnecessary to install SPD; In the roof photovoltaic system with isolated LPS, if LPV > 10m and LAC > 10m, it is applicable to PV DC T2 SPD; if LPV < 10m and LAC < 10m, it is unnecessary to install SPD; In photovoltaic power plant and LPV > 10m, LAC > 10m, applicable to photovoltaic DC T1 SPD; In the roof photovoltaic system without LPS, if LPV > 10m and LAC > 10m, PV DC T2 type SPD is applicable; if LPV < 10m and LAC < 10m, SPD may not be installed.
- DC side of photovoltaic inverter: In the roof photovoltaic system with non-isolated LPS, it is applicable to photovoltaic DC T1 SPD; In the roof photovoltaic system with isolated LPS, it is applicable to PV DC T2 SPD; In photovoltaic power plant and LPV > 10m, LAC > 10m, applicable to photovoltaic DC T1 SPD; In the roof photovoltaic system without LPS, PV DC T2 type SPD is applicable.
- AC output side of photovoltaic inverter: In the roof photovoltaic system with non-isolated LPS, if LPV > 10m and LAC > 10m, AC T1 + T2 SPD is applicable; if LPV < 10m and LAC < 10m, SPD may not be installed; In the roof photovoltaic system with isolated LPS, if LPV > 10m and LAC > 10m, AC T2 SPD is applicable; if LPV < 10m and LAC < 10m, SPD may not be installed; AC T2 SPD is applicable in photovoltaic power plant with LPV > 10m and LAC > 10m; In the roof photovoltaic system without LPS, AC T2 type SPD is applicable if LPV > 10m and LAC > 10m, and SPD may not be installed if LPV < 10m and LAC < 10m.
- Main switchboard: In roof photovoltaic system, AC T1 + T2 SPD is applicable; AC T2 SPD is applicable in photovoltaic power plant with LPV > 10m and LAC > 10m; For roof PV systems without LPS, AC T2 SPD is applicable.
| Product Family | Iimp/Imax Unipolar | Features |
| MYH9-DC T1+T2 | 9kA/40kA | T1 + T2 PV surge protection, new MOV, common mode / differential mode protection, pluggable |
| MYH6.25-DC T1+T2 | 6.25kA/50kA | |
| MYN40-DC T2 | 40kA | T2 PV surge protection, new MOV, common mode / differential mode protection, pluggable |
| MYCH12.5-DC T1+T2 | 12.5kA /50kA | T1 + T2 PV surge protection, new MOV, high energy discharge capability, common mode / differential mode protection, pluggable |
| MDH9-DC T1+T2 | 9kA/50kA | T1 + T2 PV surge protection, common mode / differential mode protection, pluggable |
| MDH6.25-DCT1+T2 | 6.25kA/50kA | |
| MDN40-DC T2 | 40kA | T2 PV surge protection, common mode / differential mode protection, pluggable |
| MYCH12.5-AC T1+T2 | 12.5kA /60kA | T1 + T2 PV Surge Protection, New MOV, High Pass Capacity, Common Mode / Differential Mode Protection, Type 3 + 1, Pluggable |
| MYH7-AC T1+T2 | 7kA/ 50kA | T1 + T2 PV surge protection, new MOV, common mode / differential mode protection, 3 + 1 type, pluggable |
DC and AC surge protectors commonly used in photovoltaic systems
