Pole-mounted LV circuit breakers and fuse boxes for 50–160 kVA compact substations
Country: Finland · Model: Pole-mounted LV breaker / fuse box
Pole-mounted LV circuit breakers and fuse boxes protect MV/LV pole transformers of 50–160 kVA and outgoing 0.4 kV overhead lines. They are built for rural networks with considerable load asymmetry. The breakers are installed on the pole, and the fuse boxes have one or two outlets depending on the transformer rating.
- Circuit breakers
- air arc extinction, pole mounting
- Fuse boxes
- 1 outlet, 50–100 kVA; 2 outlets, 100–160 kVA
- Degree of protection
- IP2X with the cover removed
- Field experience
- over 40 years in rural networks
Technical specifications
| Circuit breakers | air arc extinction, pole mounting |
|---|---|
| Fuse boxes | 1 outlet, 50–100 kVA; 2 outlets, 100–160 kVA |
| Degree of protection | IP2X with the cover removed |
| Field experience | over 40 years in rural networks |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
In the breakers the arc is extinguished in air, and the unit is mounted on the pole next to the transformer. A fuse box with one outlet suits transformers of 50–100 kVA, one with two outlets suits 100–160 kVA. The degree of protection IP2X applies with the cover removed, so protection against finger contact with live parts is kept even when the box is open. The equipment has been in use in rural networks for over 40 years, where load is spread unevenly between phases.
How to choose
The fuse box is selected by transformer rating. For 50–100 kVA take the single-outlet box, for 100–160 kVA the two-outlet one. If the rating is exactly 100 kVA, the decision depends on how many 0.4 kV outgoing lines have to be protected. IP2X is valid only with the cover removed, which should be remembered during installation and maintenance.
Request a price and lead time
Pole-mounted LV circuit breakers and fuse boxes for 50–160 kVA compact substations. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
Which transformers are the LV fuse boxes made for?
A box with one outlet suits transformers of 50–100 kVA, one with two outlets suits 100–160 kVA. The whole covered range is 50–160 kVA.
How is the arc extinguished in the breakers?
In air. The breakers with air arc extinction are installed directly on the pole.
What does IP2X with the cover removed mean?
The degree of protection IP2X is stated for the state with the cover removed. It means protection against finger contact with live parts.
Where are these breakers and fuse boxes used?
To protect MV/LV pole transformers and outgoing 0.4 kV overhead lines in rural networks. The equipment is designed for considerable load asymmetry and has been used in such networks for over 40 years.
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Need a price, lead time or replacement?
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