Fuse bases

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 U_r	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