HIGHLIGHTS
Certified in accordance with EN 50171
Ideal for emergency lighting and alarm systems
Dual input
Simplicity and safety during periodic control of system operation
Protection against battery reversal
Protection for emergency service and operator safety
High charging current
Shortened charging time
Continuous overload 120%
Large power reserve
The cabinet meets the requirements of EN 60598-1
High mechanical protection
Batteries with a 10-year lifespan
Long battery life
GENERAL FEATURES
The CSS (Central Supply System) range by Riello UPS is designed in compliance with standard EN 50171 and is therefore the ideal solution for installation in buildings subject to fire safety regulations and in particular for the power supply of emergency lighting systems. In addition the CSS range by Riello UPS is also suitable for supplying power to other emergency systems such as automatic fire extinguishing systems, alarm systems and emergency detection systems, smoke extraction equipment and carbon monoxide detection devices as well as dedicated security systems in sensitive areas. The use of centralised supply systems (CSS) ensures a significant reduction in system set-up and maintenance costs as well as making periodical checks simpler and faster to perform.
Dual input
The Riello UPS CSS range is equipped with DUAL INPUT as standard on all models. This important feature allows the mandatory scheduled checks on system operation and autonomy to be carried out with extreme ease and in complete safety by simply operating an input switch. This switch interrupts the power supply to the machine without interrupting the bypass line, which is able to support the load in the event of test failure.
High recharge current and battery care system
Proper battery care is critical to ensuring correct CSS operation in emergency conditions. The Riello UPS battery care system consists of a series of features and capabilities designed to obtain the best performance, extend operating life and satisfy the recharge times imposed by the standard. The Riello UPS CSS range is designed in compliance with standard EN 50171 and ensures high current levels are available for the batteries, allowing recharge of up to 80% of full autonomy within 12 hours.
Riello UPS CSS are suitable for use with hermetically sealed lead-acid (VRLA ), AGM and GEL batteries and Open Vent and Nickel Cadmium batteries. Different charging methods are available depending on the battery type. The recharge voltage compensation function based on temperature prevents excessive battery charges and overheating. The deep discharge protection prevents reduced battery performance and battery damage.
High overload capacity
As required by standard EN 50171, the Riello UPS CSS range is designed and sized to support continuous overloads (with no time limits) of up to 120% of the machine’s nominal power rating.
Protection against battery reversal
Mandatory in line with standard EN 50171, protection against battery inversion ensures the safety of those carrying out maintenance operations on the devices and at the same time prevents damage to the system in the event that the batteries are inadvertently connected with the wrong polarity.
GENERAL FEATURES
In addition to the features mentioned here, the Riello UPS CSS range has all the features of reliability and flexibility common to the UPS range it derives from, as well as offering compatibility with the main options and accessories.
CSS TYPES AND OPERATING MODES
Typy CSS
The Riello UPS CSS range is based on both single-phase and three-phase models divided into two product families, 1h and 3h, optimised to offer maximum runtimes of 1 hour and 3 hours respectively at nominal load in accordance with the parameters set out in standard EN 50171. In particular the models in the 3h range feature transformer-based technology and provide maximum protection for the connected load. The models in the 3h range are based on transformer-less technology, therefore providing improved efficiency and reduced footprints.
OPERATION MODES
Each type of CSS supports all operating modes specified and described in EN50171 as below:
A. Switching mode
The load is supplied via the CSS bypass branch (always supplied output “AS”). In the event of a power failure, the internal automatic device (ATSD) transfers the load to the inverter. The battery will provide power to the inverter to ensure the required operating time.
B. Non-interruption mode
The load is continuously powered by the CSS inverter (always powered “AS” output). In the event of a power failure, the battery powers the inverter and ensures the required period of operation without interruption.
C. Switching mode with additional switching device to control load switching
Additionally, from modes A and B, the device provides one or more switching devices (CSDs) that rely on the availability of normal power. In the event of a power failure, the CSD connects a load that has not been powered up to that point (“EO” emergency output).
D. Switching mode with additional switching device for partial load switching
Unlike mode C, part of the load is powered without interruption, while the remaining part is powered only in case of power failure thanks to the CSD device (always powered by emergency output “AS EO”). Requires optional EOS accessory.
Optional EOS accessories
The EOS accessory (emergency switch) is required whenever one part of the load must always be powered (always powered output “AS”) and part must be powered only in the event of a mains failure (emergency output “EO”) to create operating mode D By connecting several EOS devices in a cascade configuration, it is also possible to ensure gradual switching on of loads to limit inrush currents.