11Electrical requirements#

11.1Portable signs#

Portable signs shall be solar powered in accordance with the requirements of MRTS263 Standalone Solar (PV) Power Systems and the relevant requirements of AS 5156.

Each sign shall also have the facility to be mains powered so the batteries can be charged before being deployed to site or while at site. This shall include a mains battery charger and an IP65 rated locking connector to enable the external power supply to be easily connected and disconnected from the sign. The relevant electrical requirements defined in Clause 10 of MRTS201 General Equipment Requirements apply.

11.2Fixed signs#

Fixed signs shall be mains powered, with an IP65 rated locking connector to enable the external power supply to be easily connected and disconnected from the sign, and with surge protection and battery power supply in accordance with the requirements of Clause 10 of MRTS201 General Equipment Requirements and the relevant requirements of AS 5156. Where specified, lightning protection shall be provided to AS/NZS 1768.

11.3Power system monitoring#

The power system log is used for discerning the proper operation of the power system. The DP shall log the electrical parameters (referred to in Clause 9) for each connected sign within the roadwork site. For solar charge current / voltage, load current and battery charge voltage, the DP will aggregate the measurements that it receives from the connected signs over a one hour period. Each sign shall report no less than 4 measurements for each parameter per hour to the connected DP.