Metal Oxide Surge Arresters Type Series SBK

Metal Oxide Surge Arresters

SBK Series in Solid Core Design for applications up to 170 kV

The arresters with silicone housing in Solid Core Design of the SBK series are available for up to 170 kV.

As for all arresters with silicone housing, Tridelta uses high-quality LSR Silicone, which keeps its hydrophobic and UV-resistant/non-ageing properties over the complete service life and ensures excellent artificial pollution performance.

Because of its modular design, the SBK arresters in Solid Core Design can be easily manufactured adapting to variable lengths, creepage distances and clearances in accordance with customer requirements. Due to their very low weight, they are an ideal solution for application as transmission line arresters in addition to their use as station arresters.

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Features

Field of application

Protection of transformers, switchgears, and plants against atmospheric and switching overvoltages

Selection of metal oxide surge arresters

The selection of the rated and the continuous operating voltage of the arresters is depending on the neutral performance of the networks. Guidelines for selection: see DIN VDE 0675/part 5 and IEC 60099-5

Design

Silicon housing: grey RAL 7040

Fittings: Al alloy

Connections: clamps, screws, nuts hot-dip galvanized or stainless steel

Optional accessories

Monitoring spark gaps, surge counters, diagnostic appliance

General Specifications

Product		SBK
High System Voltage Us	kV	170*
Max. Rated Voltage Ur	kV	150*
max. Nominal Discharge Current ln (at 8/20μs waveshape)	kA	10
Max. Thermal Energy Absorption Capability	kJ per kV of Ur	7
Max. Line Discharge Class		3
Qrs (accor. IEC 60099-4 Edt. 3.0)		2.0
High Current Withstand Strength 4/10 μs	kA	100
Max. Low Current Withstand Strength 2ms	A	1000
Max. Short Circuit / Pressure Relief Capability	kA – 0.2s	40
Mechanical Strength: Specific short-term load SSL	Nm	500

* Higher rating for line arrester applications (TLA) available on request