Introduction
DC isolation switches, also known as DC disconnect switches or DC safety switches, are devices used to disconnect a DC power source from a load or electrical system. They are designed to provide a means of cutting off the flow of DC current for maintenance, repair, or safety purposes.
DC isolation switches come in various forms, including manual and automatic switches, as well as single-pole and multi-pole configurations. They are used in a wide range of applications, including solar power systems, battery banks, and electric vehicles.
The similar names are Solar Isolation Switch, Photovoltaic Isolation Switch, PV Safety Disconnect Switch,DC PV Isolator etc.
Function
ELR2 Series DC Isolator Switch in plastic enclosure is applied to 1~20KW residential or commercial photovoltaic system, placed between photovoltage modules and inverters. Arcing time is less than 8ms, that keeps solar system more safe. To ensure its stability
and long service life, our products are made by components with optimum quality. Max voltage is up to 1200V DC. It holds a safe lead among similar products.
- IP66 rated enclosure, UV Resitant
- 4 x M20 knock holes
- The handle can be padlocked in the “OFF” position
- MC4 plugs can be selected for convenient connection and space saving
- 2 Poles, 4Poles are viable(Single I Double String)
- Standard: IEC60947-3, AS60947.3
- DC-PV2, DC-PV1, DC-21B
- 16A, 25A, 32A, DC1200V
Specifications
| Type |
Standard |
|
lEC/EN 60947-3, AS60947.3 |
|
Electrical
features |
Function |
|
Isolator, Control |
| Poles |
P |
4 |
| Utilization category |
|
DC-PV2/DC-PV1/DC-21B |
| Rated frequency |
|
DC |
| Rated operational voltage(Ue) |
V |
300, 600, 800, 1000, 1200 |
| Rated operational voltage(Ie) |
|
see the next page |
| Rated insulation voltage(Ui) |
V |
1200 |
| Conventional free air thermal current(Ithe) |
|
// |
| Conventional enclosed thermal current(Ithe) |
|
same as Ie |
| Rated short-time withstand current(Icw) |
|
1kA, 1s |
| Rated impulsed withstand voltage(Uimp) |
kV |
8 |
| Overvoltage category |
t |
II |
| Suitability for isolation |
|
Yes |
| Polarity |
|
NO polarity,“+”and“-”polarities could be interchanged |
| Mechanical
features |
Electrical life |
t |
2000 |
| Mechanical life |
t |
18000 |
|
Installation |
Ingress protection |
|
IP66 |
| Storge temperature |
C |
-40~+85 |
| Mounting |
|
Vertically or horizontally |
| Pollution degree |
|
3 |
Switching Configurations
