Table 4 – St950 Dimming Transformer Selection For Led Loads 1 - Siemens ST950 Handbook

For the theoretical junction, using the figure obtained above of 399W and 160V
dimming, the transformer required would be the 1.5kVA version. Note that in this case,
the same transformer would be chosen regardless of which dimming voltage was
required.
Table 4 – ST950 Dimming Transformer Selection for LED Loads
Maximum
Lamp
Current
1.5 kVA 20A
3.0 kVA 20A
Table 5 – ST950 Dimming Transformer Selection for Halogen Loads
The table shows the maximum 'average signal lamp power' that each dimming
transformer is capable of providing at each of the dimming voltages. It also shows the
equivalent number of LED & Tungsten Halogen High Intensity lamps (see Table 2).
* The number of lamps shown is limited by the Controller's maximum lamp current (see
Table 3).
1
– Helios CLS LED – NLM (no LMF fitted) – 12W Bright, 4W Dim (all dim voltages)
2
– 50W Tungsten Halogen High Intensity – 63W Bright, 20W@120V, 27W@140V,
33W@160V
Security classification Unrestricted
Version 4
Last Editor Paul Cox
Document Name ST950 General Handbook
Copyright © Siemens plc 2015. All Rights Reserved.
Maximum
Lamp
Current
500VA 20A
Dimming Voltage Required
120V
73 Lamps*
73 Lamps*
Mobility Division, Traffic Solutions
Sopers Lane, Poole, Dorset, BH17 7ER
Dimming
Voltage
(154V)
125 Lamps
140V
55 Lamps 45 Lamps
73 Lamps* 73 Lamps*
Page
Status
Date
Document No.
Mobility is a division of Siemens Plc
1
160V
2
31 of 107
Issued
16-Jul-2015
667/HB/46000/000