10Type-1 Electrical requirements#

The electrical requirements of MRTS201 General Equipment Requirements apply to this Technical Specification unless otherwise specified. Additional electrical requirements for equipment provided under this Technical Specification are given below.

Detailed designs of the electrical wiring and charging assembly shall be reviewed and signed by the Contractor’s RPEQ. They shall then be submitted and approved by the Principal or their delegate for verification and acceptance. Hold Point 4

10.1Type-1 Portable traffic signal lanterns#

The electrical requirements of traffic signal lantern aspects used in PTSSs shall be in accordance with the requirements of AS 2144, unless otherwise specified.

Only 3 aspect (green, yellow, red) LED lanterns shall be used.

10.1.1Type-1 Supply voltage#

The PTSS shall only use traffic signal lantern aspects that are 12V Direct Current (D.C.) lanterns as per AS 2144.

10.1.2Type-1 Dimming#

Dimming is not a requirement for a Type-1 PTSS.

10.2Type-1 Solar panel array#

Solar systems are not permitted in Type-1 PTSS.

10.3Type-1 Batteries#

10.3.1Type-1 Portable Traffic Signal System#

The Type-1 PTSS shall be powered from batteries. The battery technology used in a Type-1 PTSS shall be lithium iron phosphate (LiFePO4) and subject to the following additional conditions:

1. a)Shall operate a PTSS for a minimum of 12 hours of continuous operation.
2. b)Shall have a facility that allows the battery to be charged while the PTSS is not in use. This facility shall prevent batteries from charging at voltages outside of the battery's intended range.
3. c)Shall not exceed 80% Depth of Discharge (DOD).
4. d)Shall be installed to minimise the risk of:
5. i.impact by a motor vehicle
6. ii.theft or vandalism, and
7. iii.explosion.

Suitable circuit protection shall be fitted between the battery and any connected load. The circuit protection shall be appropriately sized for the rated load.

A switch shall be fitted to safely disconnect the battery from the load in the event of a catastrophic failure or incorrect signal display.

10.3.2Type-1 Hand-held remote control#

The hand-held remote control shall be powered from batteries. The battery technology used shall be lithium iron (LiFePO4) or Li-ion and subject to the following additional conditions:

1. a)The battery shall operate the connected load for a minimum of 12 hours of continuous operation under normal usage conditions.
2. b)The HRC shall have a facility that allows the battery to be charged while the PTSS is not in use. This facility shall prevent batteries from charging at voltages outside of the battery's intended range.
3. c)Depth of Discharge (DOD) shall not exceed 50%.
4. d)The battery used shall have a cycle life of at least 800 cycles.

10.3.3Type-1 Battery charger#

All battery chargers shall be connected to the battery bank by fixed wiring via the main battery fuse or circuit breaker. If the main battery fuse or circuit breaker will not provide overcurrent protection for the battery charger output wiring, the battery charger output cabling shall be protected from overcurrent by separate HRC fuse or a D.C. rated circuit breaker adjacent to the main battery fuse or circuit breaker.

The battery charger shall be fitted with a fuse or circuit breaker to provide an isolating point and battery charger overcurrent protection.