NR NR/SIN/194 ISSUE 1 PDF

The scope of this Special Inspection Notice (SIN) is to perform visual inspection, audible inspection and partial discharge test to Sadtem VT models YE7 and BBY2 found with outdoor ABB FSKII 25 kV A.C Circuit Breaker, where used in either:

• ABB SMOS type substations

• Conventional ABB Circuit Breaker substations

Tests above should be performed to all Sadtem VTs model YE7 and BBY2 on Network Rail managed infrastructure within the following Regions:

• Eastern

• Wales & Western

• Scotland

Purpose

The purpose of this Special Inspection Notice (SIN) is to confirm the integrity and safe operation of all Sadtem Voltage Transformer (VTs) models YE7 and BBY2 installed with 25 kV A.C Circuit Breaker ABB FSKII on Network Rail’s infrastructure.