Modelo t´ ermico matem´ atico reducido

1.0 General

The Programmable Lighting Management System shall be supplied, installed and commissioned in accordance with the European Installation Bus – EiB technology.

The system shall also work as a stand-alone unit including timing functions incase of PC failure and shall be programmable locally. Proposed system shall not have any bottle neck or single source of failure. Proposal shall be based on a redundant system.

A two-wire bus cable shall link+ all sensors (push buttons, brightness sensors, motion sensors, timers, etc.) and actuators (on/off controllers, dimming controllers, etc.) to each other. The bus cable shall be a twisted pair, screened & shielded with solid conductors and shall be capable of handling information exchange and supplying power to the bus devices. The bus cable shall be laid in the building in the form of a linear, star or tree structure similar to the power mains.

The system shall be completely de-centralized and programmable. The programming shall be implemented via a high end PC located in BMS room and having access level passwords. Any device in the system shall be accessed for programming from the PC location without having to manipulate the device locally.

Each device in the system shall be addressable via a software programmable physical address. Any device in the system shall communicate with any other device via software programmable group addresses (telegrams). Each individual device will respond to only those group addresses for which they are programmed to do so. There shall be an EEPROM storing the physical address, group addresses & other software parameters for every device, thus making it intelligent. No centralized processors or centralized memory storage devices shall be permitted.

It shall be possible to program any of the devices on-line at the working site without affecting any of the system devices or the system operation as well as off-line prior to despatch of the material to site.

The entire system shall consist of bus lines each consisting of up to 64 devices. Two consecutive lines shall be connected to each other via line couplers that act as network filters and also provide communication between devices in different lines. In the event of failure of a device in one line, only the control functions controlled by that device shall be affected and the device failure report shall be printed out with the date and time of failure.

The power supply module feeding power to the network shall consist of a built in back-up power to compensate short voltage interrback-uptions of back-upto 200 ms. This back-back-up power shall enable the system to put all actuators in a fail-safe position (either on or off or as it is) in the event of power failure.

The diagnostic modules shall scan the system for any faults in the bus wiring, failure of any of the devices and generate reports displaying the physical address of non-communicating devices.

The Lighting Management System shall also be integrated with the Building

Management System in automation layer so as to monitor and control the required

circuits from the BMS workstation and hence to achieve a reliable system. EIB / C-bus interface to be provided for total integration.

It is electrical Contractors scope and responsibility to re-arrange circuiting to achieve the functionality of C-bus / EIB system as explained without any claims.

The following codes and standards to the extent specified herein, form a part of this specification. When an edition date is not indicated for a Code or Standard the latest edition enforce at the time of proposal submitted shall apply.

IEC 60947-4 Contactors

IEC 60947-5-1, IEC337-1,

IEC 60536 Indication lamps, Push buttons, switches BSEN 60529

BSEN61439 Low voltage switchgear and control gear BSEN 61008 Earth leakage circuit breakers

BSEN 60898 Miniature circuit breakers BS7671 17^TH Edition, IEE wiring regulations

2.0 CONTROL SYSTEM CONCEPT

The programmable lighting management and control system shall consist of following levels of control.

The BMS shall be utilised for time based control and manual override by the BMS operator. The EIB system shall be software interfaced with BMS and transfer all data to BMS. The software shall consist of graphics based overview of the entire building, floors and going up to the individual rooms. It shall have the necessary timer modules to control the circuits in the form of various groups. It shall be possible to pre-program the time channels in advance with special holiday programs, weekly programs, etc.

In the event the PC is not operational or is switched off, the standalone mode shall control the lighting circuits as per programmed times. This shall be ensured via controllers programmed with the same timer schedules as that of the central PC software.

A second level of standalone operation shall also be possible via local timer modules capable of being programmed with switching times locally without the need to connect a PC. 4-channels timer capable of being programmed with at-least 128 time schedules / timer shall be provided for each network group of 64 devices to ensure this standalone operation. This shall ensure that the system remains operational at all times in the auto mode.

All other circuits which are controlled based on occupancy sensors, daylight, local switches, etc. shall at all times be working in the standalone ‘Auto’ mode with monitoring and override control possible from the central PC.

Lighting Control Concept

All lighting shall be controlled such that unnecessary lights shall be switched ‘Off’ based on occupancy and duty hours. Also lights redundant due to sufficient daylight shall be switched ‘Off’ based on light sensor and time schedules.

The movement sensors shall have a built-in lux sensor with an adjustable set point so as not to switch ‘On’ circuits even after detecting movement due to sufficient natural light.

There shall also be an adjustable ‘Off’ delay on the movement sensor from 1 sec to 16 min so as to ensure that circuits are not switched ‘Off’ immediately. Further, the movement sensor shall incorporate a “manual-auto-off” switch for maintenance and local override purpose.

Lighting control in different areas shall be as follows:

The scenes or requirements listed below must be programmable as per site requirements.

a) Car Parking

Lights connected to emergency circuit shall be ON all the time Switch OFF all lights

Switch off 50% of drive way lights.

Parking bay On / Off and 50% on/off.

Ramp lights shall be kept “ON” during night time and shall be selectable.

Stair lights operated through push buttons and switch OFF after defined time.

b) Corridor, Lift Lobbies

Switch 50%, 50% lights based on occupancy.

Switch OFF all lights.

Switch On lights connected to Central Emergency Lighting System.

Movement sensor based operations.

c) External

Switch On / Off external lights in ground and roof floors, façade (elevation) lights, signboards, etc. based on time lighting level (programmable) and season.

Switch On / Off external façade lights based on the requirements of façade lighting Consultant. Complete façade lighting shall be controlled through Lighting Control System as per lighting Consultant’s requirements.

Number of daylight / twilight sensors must be suitable to achieve the operation and exact location to be decided at site. Contractor to include additional sensors if required while commissioning proper coverage without any variation.

A four channel timer device shall control circuits on a particular network group (line) so as to have local standalone operation. It shall be possible to send signals from a timer channel in one network to circuits in another network if programmed to do so. This is to ensure that all timer channels are available for control of all circuits in the system. Each timer shall be capable of being programmed locally with at-least 128 timer programs for any of the four channels combined together, without the need to connect a PC. Each of the four channels shall have a manual push-button to over-ride the channel to ‘On’ or

‘Off’ irrespective of the time programs. In addition, each channel shall have a

‘Off-Auto-Manual’ switch for local over-ride purpose. The timer shall have a built-in battery back-up to ensure that the timer is always operatbuilt-ing even built-in the event of power failure. This timer device shall be in addition to the PC software time schedules to ensure uninterrupted stand-alone operation of the system at all times.

e) Staircase lighting

All staircase lighting shall be controlled by timers and push button switches. Light shall be turned ‘ON’ using the push button switches and shall be turned ‘OFF’

automatically after a pre determined time period which can be set using the timer.

Separate timer control shall be provided for each group of lights such as facia lighting, land scape lighting, water feature lighting, Walkway/road lighting, and boundary wall lighting as applicable.

Actual time schedule for the various circuits shall be decided during commissioning time and shall be to the approval of consultant.

f) Offices, Doctors’ Offices, Stores, Staff Lounges, Nurses Rooms, Examination / Treatment Rooms, Multi-Purpose Rooms, sterilization, pharmacy, Outpatient Clinics, Etc:

lighting control shall be by timer channels and override switch in the above mentioned areas. lights in individual offices shall be turned on/off using the intelligent switch during working hours, however the system switches shall be overridden by timer schedules during non-working hours and on holidays in which lights shall be turned off. Different application areas shall have separated timer channels

g) Conference and Meeting Rooms

Lighting control shall be by timer channels and intelligent lighting control switch.

Lights in individual rooms shall be turned on/off using the intelligent switch during working hours; however the system switches shall be overridden by timer schedules during non-working hours and on holidays. Intelligent dimmer switches for dimming the lighting during presentation

h) Wards Corridors

All lights connected to emergency power supply shall be on all the time. lights connected to the power supply shall be on/off through programmable timer channel, actual time schedule as per client requirements. Dedicated timer

channel will be provided for wards corridor lighting. Intelligent switches shall be provided at nurse station for the purpose of overriding

i) Entrance at Ground Floor

Lighting shall be switched on/off based on available daylight. A light value switch capable of switching up to three lighting groups where each individual channel has a separate switching set point shall be used. The brightness range of the set points shall be adjustable from 2 to 2000 lux or 20 to 20000 lux as agreed with the client at the time of commissioning. A light sensor shall be connected to the switch to detect daylight.