Siemens ST950 - Page 26

Mobility, Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Security classification
Unrestricted
Page
26 of 154
Version
7
Status
Issued
Last Editor
manpreet.jeerh
Date
January 2020
Document Name
ST950 ICM Handbook
Document No.
667/HE/45950/000
Copyright © Siemens plc 2020. All Rights Reserved. Mobility is a division of Siemens Plc
If a second transformer is fitted as part of the 20A to 40A upgrade kit,
both transformers MUST be set to the same tapping selection.
Figure 6 – ELV Transformer Connections: 250V mains
Figure 7 – ELV Transformer Connections: 240V mains
240
220
110
Earth
Earth
230
120
120
0
Earth
Earth
Live Input
Live to LPU
Link 120V to 120V
Neutral Input and to LPU
230
250
220
110
Earth
Earth
250
230
120
120
0
Earth
Earth
Live Input
Live to LPU
Link 120V to 120V
Neutral Input and to LPU
230
240