AS 5715:2015 pdf free download – Uninterruptible power systems (UPS) for road side devices

AS 5715:2015 pdf free download – Uninterruptible power systems (UPS) for road side devices.
1.3.11 Primary power
Power supplied by an electrical utility company or by a user’s generator.
1.3.12 Rated current
Input or output current of the UPS as declared by the manufacturer.
1.3.13 Rated voltage
Input or output voltage of the UPS as declared by the manufacturer.
1.3.14 Rated voltage range
Input or output voltage range of the UPS as declared by the manufacturer, expressed by its lower and upper rated voltages.
1.3.15 Stand-alone UPS
UPS contained within a dedicated housing.
1.3.16 Static bypass (electronic bypass)
Power path (primary or stand-by) alternative to the indirect a.c. converter, where control is via an electronic power switch, for example, a transistor. thyristor, triac or other semiconductor device or devices.
1.3.17 Static bypass switch
UPS switch designed to provide static bypass function.
1.3.1k Stored energy mode
Operation of the UPS when supplied by the following conditions:
(a) Primary power is disconnected or is out of a given tolerance.
(b) Battery is being discharged.
(c) Load is within the given range.
(d) Output voltage is within the given tolerance.
1.3.19 tninterruptible poser system (UPS)
Combination of convertors. switches and energy storage devices (such as batteries), constituting a power system for maintaining continuity of load power in case of input power failure.
NTE: Continuity of load power occurs %hen voltage and frequency are within rated steady-state and transient tolerance hands and with distortion and interruptions within the limits specified for the load Input pocr failure occurs when voltage and frequency arc outside rated steady-state and transient tolerance bands or with distortion or interruptions outside the limits specified for the UPS.
2.1 GENERAL
The UPS shall he designed to power roadside devices under all conditions expected to be encountered at the roadside.
The UPS shall be capable of operating from any of the tbllowing supplies:
(a) Mains supply.
(h) Portable generator supply.
(c) Storage batteries.
See Figure 2.1 for a functional diagram of a UPS for supporting roadside devices.
2.2 POWER SUPPLY CONTINUITY
Where there is interruption to the primary power supply, the UPS shall ensure continuity of a.c. power for a user-specified duration without affecting operation of the load.
After a primary power supply is restored, the UPS shall revert to the primary power supply without affecting operation of the load.
2.3 POWER QUALITY MANAGEMENT
The UPS shall ensure the quality of the output power supply to the roadside devices by keeping it within specified parameters.
2.4 STATUS INI)ICATION
The UPS shall provide an indication of its operational status and any fault conditions.
2.5 AUXILIARY POWER CONNECTION
The UPS shall provide a connection for an auxiliary a.c. power source as an alternative to the a.c. mains supply.
2.6 USER CONTROL
The UPS shall provide user control and switching facilities to enable—
(a) the change of system parameters;
(b) the change of mode of operation; and
(c) the maintenance bypass mode.