Specifications

ST900 Family General Handbook
667/HB/32900/000 Issue 11 Page 207 of 265
SYRIA: Flashing amber start-up and part-time.
Traffic: red - green - amber - red.
Ped: standard (with three-second blackout).
Supply: 240V 50Hz (Damascus).
SRI LANKA:
As Bahrain, but with flashing amber start-up. 240V 50Hz.
TRINIDAD: Flashing amber start-up with flashing amber (main road)
and flashing red (side road) part-time.
Traffic: red - green - amber - red.
Ped: standard sequence.
Both 240V 50Hz and 110V 60Hz are used in Trinidad and
Tobago depending on the actual location.
ZAMBIA:
As Syria with 240V 50Hz.
28.5 Wig Wag Signals
28.5.1 Introduction
Figure 34 – Flashing Red Wig-Wag Signals
The Siemens Wig-Wag system is a complete solution for the provision of priority
signals at fire and ambulance stations. The signals may also be used in other
locations such as bridge crossings where there is a need to stop ordinary traffic flow
but where it may be difficult for drivers to forecast when they will be required to stop
In the UK, the ST900LED and ST900ELV Traffic Controllers are approved to both
TR2500A and TR2513A, which allows them to be used at fire and ambulance
stations and at bridges, but not at rail crossings.
The controller can provide stand alone Wig-Wag applications and also full
intersections where Wig-Wags are required nearby.
Both LV and ELV Wig-Wag Signals utilise the latest generation of low power CLS
LED signals. The Siemens Wig-Wag signals are compliant with TSRGD Diagram
3014 and conform to EN12368. Lamp monitoring is undertaken directly by the
controller on both LV and ELV signals, eliminating the need to fit lamp monitoring
equipment within the Wig-Wag signals, ensuring power usage is kept to a minimum.