Connection niche in metal/polycarbonate case
It is used in low voltage distribution networks for the power supply of home users (apartment blocks, villas, etc) and public administration buildings.
Functions
- it provides protection in case of malfunction on each phase of the electric circuit on the low voltage outputs in the distribution network, through the burning of the safety fuses;
- it provides visible separation, in order to protect the operating personnel, through the removal of the safety fuses;
- it provides the supply loops for the urban network.
Technical features:
| Rated power |
Max. 400A main circuits |
| Rated voltage |
400 / 230 V a.c. |
| Insulation voltage |
690 V a.c. |
| Rated frequency |
50 Hz |
| Normal protection standard |
IP 54 (outdoor metallic case)
IP 44 (polycarbonate case)
IP 54 (indoor metallic case) |
Component parts- Metal case (for the outdoors variant) which provides the IP 54 protection standard
- Glass fiber reinforced polycarbonate case (for the outdoors variant) which provides the IP 44 protection standard
- Polycarbonate base on which the connection niche is fixed
- Metal frame with protection doors (for the indoors variant) which provides the IP 20 protection standard
- Metal rack for supporting the supplying columns
- Three-phase supplying columns made of: SIST-type safety fuses or vertical three-pole sockets or vertical three-pole separators, for both input and output
Operating conditions:| Erection location | Indoors/outdoors | | Climate group | WDr/CT (moderate climate: hot dry / cold temperate) | | Environment ambient temperature range during operation | -25 ÷ 40°C | | Environment ambient temperature range during transportation, storing and erection | -40 ÷ 50°C | | Average ambient temperature in 24 hours | 35°C | | Air relative humidity | Max. 100% at 25°C | | Maximum altitude | 2000 m; | | Pollution degree | 3 | | Over-voltage category | Category III | | Electro-magnetic mediums | Environment A | | Life span | 25 years |
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