Construction
Fuse bases are composed of the base main frame, MV bushing insulators and a fuse link.
PBNV-24, PBNV-30 overhead bases are designed for fixing WBGNp-17,5 and 24, OWBG-36 fuse links up to 25 A, as well as for connection with secured circuit in overhead switchgears, in particular in pole transformer substations up to 400 kVA.
PBNW-24 overhead fuse bases are designed for installation of pipe type fuses HH 24/....A, VVC/HH 24/....A up to 63 A, and to connect with a secured circuit in overhead switchgears, in particular in pole transformer substations with a transformer more than 400 kVA.
Technical parameters of the fuse bases
Compliance with standards:
Fuse bases comply with the latest PN-EN standards and have a certificate of conformity from the accredited body: the Institute of Electrical Engineering in Warsaw.
Technical parameters of the fuse bases | ||
Rated voltage Ur | 24 kV | 36 kV |
Isolation lightning impulse test voltage | ||
- underground and inter-pole | 125 kV | 170 kV |
- inter-terminal | 145 kV | 195 kV |
Rated isolation altering test voltage | ||
- underground and inter-pole | 50 kV | 70 kV |
- inter-terminal | 60 kV | 80 kV |
Rated frequency | 50 Hz | |
Rated continuous current of the base | 250A (depending on the value of the used link) | |
Rated continuous currents of the fuse links | PBNV-24 (from 2 to 25A) PBNW-24 (from 0,5 to 63A) |
|
Rated interrupting current | 6,3 kA | |
Link type | Up to PBNV-24 WBGNp-17,5 and 24, OWBG-36, Up to PBNW-24 HH 24.....A; VVC/HH 24.....A |
|
Bushing insulator type | CH-4-125 ,ISWN | CH4-170 |
Designation
PBNV

- Bushing insulator
- Fuse link WBGN
- Current terminal
- Earthing terminal
- Assembly element of the base
- Main contacts of the base
PBNVo-24/D w I

- Bushing insulator
- Fuse link WBGN
- Current terminal
- Earthing terminal
- Assembly element of the base
- Main contacts of the base
- Lightning arrester
PBNW-24

- Bushing insulator
- Fuse link HH
- Current terminal
- Earthing terminal
- Assembly element of the base
- Main contacts of the base