Photovoltaic system: electrical equipments selection: Difference between revisions
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== Grid connected PV system | == Grid connected PV system <= 10kW (Residential) == | ||
===One single phase inverter=== | === One single phase inverter === | ||
* Typically, a 5kW grid-connected single-phase inverter. with UOC MAX 600V. | *Typically, a 5kW grid-connected single-phase inverter. with UOC MAX 600V. | ||
* One or two strings – Isctc | *One or two strings – Isctc < 25A, IAC < 32A. | ||
* In this design there is no string protection. | *In this design there is no string protection. | ||
* A PV main switch is necessary. When the inverter is indoors, an additional remote controlled switch at the DC cable entry point is recommended for emergencies services. | *A PV main switch is necessary. When the inverter is indoors, an additional remote controlled switch at the DC cable entry point is recommended for emergencies services. | ||
[[ | [[Image:Fig P22.png|none|Fig P22.png]] | ||
{| width="800" border="1" cellpadding="1" cellspacing="1" | |||
|- | |||
| bgcolor="#D1E9D4" | '''Needs''' || String junction box || PV array main switch || Inverter || AC box (400V) | |||
|- | |||
| bgcolor="#79C68C" colspan="4"| '''Switchgears and control''' | |||
|- | |||
| bgcolor="#79C68C" | | |||
:Isolation || • || • (d) || (a) || • (d) | |||
|- | |||
| bgcolor="#79C68C" | | |||
:Switching<br>(Making & breaking<br>rated current || •<br>DC21B || (a) || • (d) || | |||
|- | |||
| bgcolor="#79C68C" | | |||
:Control || • (b) || • (d) || (e) || • (d) | |||
|- | |||
| bgcolor="#79C68C" | | |||
:Over-current protection || (c) || || || | |||
|- | |||
| bgcolor="#79C68C" | | |||
:Protection against<br>Insulation fault || || || (h) || (h)<br>RCD type B or A SI | |||
|- | |||
| bgcolor="#A6D6AE" | '''Surge protection''' || || • type 2 || || • type 1 or 2 | |||
|- | |||
| bgcolor="#D1D3D4" | Enclosure || Outdoor IP5x<br>Double insulation || Indoor IP5x<br>Double insulation || || Standard AC requirement +<br>grid code requirement | |||
|} | |||
'''''Fig. P23 :''''' '''10-100kW single multi MPPT inverter''' | <br> '''''Fig. P23 :''''' '''10-100kW single multi MPPT inverter''' | ||
Revision as of 14:59, 16 October 2013
Grid connected PV system <= 10kW (Residential)
One single phase inverter
- Typically, a 5kW grid-connected single-phase inverter. with UOC MAX 600V.
- One or two strings – Isctc < 25A, IAC < 32A.
- In this design there is no string protection.
- A PV main switch is necessary. When the inverter is indoors, an additional remote controlled switch at the DC cable entry point is recommended for emergencies services.
| Needs | String junction box | PV array main switch | Inverter | AC box (400V) |
| Switchgears and control | ||||
| ||||
| ||||
| ||||
| ||||
| ||||
| Surge protection | • type 2 | • type 1 or 2 | ||
| Enclosure | Outdoor IP5x Double insulation |
Indoor IP5x Double insulation |
Standard AC requirement + grid code requirement | |
Fig. P23 : 10-100kW single multi MPPT inverter
