Controller Load Power Consumption & Dimming Transformer Selection - Siemens ST950 Handbook

3.6 Controller Load Power Consumption & Dimming Transformer
Selection
This section describes the method used to determine that the controller can supply the
total lamp load required, how to select the correct dimming transformer and how to
determine the overall power used for estimation of site running costs.
In order to do this, the power taken by the lamps needs to be calculated. Use the
following table to determine the average power taken by the different types of lamps.
It must be noted that up to date information for Helios LED and Nearside units and be
found in the Helios General handbook 667/HB/30000/000.
65W WAIT Indicator – Generic
40W WAIT Indicator – Generic
50W Tungsten Halogen High Intensity -
Generic
Regulatory sign (wattage) generic
(Use this for estimation of power
consumption)
Regulatory sign (Volt-Amps)
(Use this for calculation of current)
LV LED Regulatory Sign
Helios CLS LED Signal – with (LMF)
Helios CLS LED Signal – NLM (no LMF
fitted)
LED Wait (Measured at 48 Volts)
See Note 1
Or
Nearside Demand Indicator LED
Red/Green Nearside
See Note 1
The 500VA (LED) variant of the dimming transformer only has a single tap of 154V. For
all power calculations the value for 160V may be used.
Security classification
Version
Last Editor
Document Name
Copyright © Siemens plc 2015. All Rights Reserved.
Table 2 – ST950 Lamp Load Per Aspect (Watts)
Unrestricted
4
Paul Cox
ST950 General Handbook
Mobility Division, Traffic Solutions
Sopers Lane, Poole, Dorset, BH17 7ER
Part Number
65
42
63
30
76
667/1/33510/230 10
667/1/31500/8xx 34
667/1/31500/9xx 12
667/1/30210/100
667/1/33602/010
9
667/1/30675/101
667/1/33601/010
23
667/1/33601/510
Page
Status
Date
Document No.
Mobility is a division of Siemens Plc
35 - 53
22 - 25
20 27 33
Not Dimmed
Not Dimmed
Not Dimmed
- - 13
4 4 4
- - 3.5
- - 5
26 of 107
Issued
16-Jul-2015
667/HB/46000/000