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Central Battery Systems

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Central battery system based emergency lighting is idealfor larger projects. There are many reasons for this, themain ones being:

Simplified maintenanceSelf contained emergency luminaires each incorporateindividual rechargeable batteries. The combination ofraised ambient temperature within typical luminaires andcontinuous charging under mains healthy conditionsresults in a normal battery life of around 4 years. At theend of the battery life, each individual battery must bereplaced, this is a time consuming and disruptive processoften requiring the mains fittings to be dismantled to gainaccess to the battery.

With a Central battery system the battery is housed in asecure cabinet in a suitable, easy to access location such asa plant room. The batteries in a central battery system willtypically have a 10 year design life, and when replacementis required they can be easily and quickly replaced.

On large systems with hundreds of emergency luminaires,Central battery systems potentially offer massive savings inmaintenance cost and disruption.

Why central battery systems?

Integrated Emergency lightingStatic inverter type central battery systems are able topower suitable unmodified mains luminaires at full powerduring both mains healthy and mains failed conditions.On projects with large open areas, particularly those withhigh mounting heights, the use of mains fittings operatingat full output in emergency mode can greatly reduce thenumber of emergency luminaires required. The use ofsuitable standard unmodified mains luminaires also hasaesthetic advantages in many applications.

System features

Modular inverterdesignIndividual inverter modulescan easily be removed formaintenance or to reduceweight during installation(2.5KVA and above)

Integral plinthFor ease of positioning

Note: Compact units (AC500...) differ slightly from above, contact technical sales for full details (Tel: 01302 303221)

Comprehensive indicationdisplayShows current system status ata glance

Temperature compensationwith digital displayAutomatically adjusts chargervoltage to optimise performanceand life in response to ambienttemperature.

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This can considerably reduce the overall installed cost ofthe system by reducing the amount of distribution wiring.Distributed systems can also increase system integrity bylimiting the area affected by failure of an individual unit.

The compact 500VA static inverter system is ideal for useas part of a distributed system, having a small footprintand a lift off front cover, ideal for use in areas where accessspace is limited.

Centralised or distributed systems

Cooper Lighting and Security manufactures a wide rangeof Central battery systems. Standard products includestatic inverter systems with ratings from 500VA to 30KVA.

Smaller systems are ideal for providing emergency lightingin small localised areas, e.g. Atriums where traditionalemergency lighting is not appropriate, alternativelymultiple small systems can be utilised, located atconvenient points throughout the building.

Distributed systems can save on overall wiring

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To complement the range of Central systems, a wideselection of slave luminaires and conversion modules isalso available, which have been specifically designed toensure compatibility with Cooper Lighting and Securitycentral systems. Alternatively ACM1 modules can be usedto enable suitable normal unmodified mains luminaires tobe utilised for both normal and emergency lightingoperation.

ACM1 modules can either be mounted inside thedesignated luminaire, or housed in a remote enclosure.When housed in a remote enclosure, the ACM1 can eitherbe used to control an individual luminaire or a series ofluminaires, that all share a common switched live undernormal mains healthy conditions.

The operation of the ACM1 module is described opposite.

Cooper Lighting and Security offer dedicated slaveluminaires, that have been purpose designed to operatewith static inverter systems, they have a light output anddistribution that has been optimised to provide typicalemergency lighting design values.The use of these efficient low power luminaires cansignificantly reduce the physical size, output rating andcost of the static inverter system compared to the use ofadapted normal mains luminaires. ACM1 units can also beused to control dedicated slave luminaires if either localswitching (see above) or non maintained operation isrequired.

For non maintained slave operation, the ACM1 can be usedto “hold off” the supply to the dedicated emergencyluminaires until a mains failure occurs.

This is achieved by simply not adding a switched liveconnection to the ACM1.

Choice of emergency luminaires

Mains onlyLuminaires

CombinedMains/EmegencyLuminaire

Local SwitchedSupply

ACM1




ACM1




ACM1




ACM1

Normal mains healthy condition

Failure of normal lighting final circuit

Total mains failure

OR

KEY- LIVE- DEAD

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Legislation demands that emergency lighting systemsare regularly tested and maintained in full working order.The Easicheck Addressable testing systems can greatlysimplify the testing and maintenance regime, byautomatically carrying out complete automatic testing ofthe entire emergency lighting system and raising an alarmwhen remedial work is required.

Easicheck removes the need for expensive, time consumingmanual testing of emergency lighting systems, and ensuresthat a thorough, consistent test regime is implemented.As well as carrying out regular testing of all connectedemergency luminaires, the Easicheck system continuallymonitors the status of the central battery units to ensurethat key parameters such as battery voltage and chargecurrent are at the correct level.

The Easicheck system consists of a control panel (or seriesof control panels on large projects) and an addressableinterface added to each emergency luminaire and controldevice. An individual Easicheck panel can monitor andcontrol up to 250 addressable interfaces, each of whichcould be either a luminaire, a control device or Centralbattery system.

Where ACM1 modules are utilised to allow standard mainsfittings to also operate as emergency luminaires, specialaddressable versions are available which have the samefunctionality as normal ACM1 modules, but in additioncan be controlled by Easicheck for automatic testingpurposes. An additional interface is fitted to each centralbattery unit to allow Easicheck to monitor criticalparameters and to activate discharge testing as required.

Control panels can operate on a stand alone basis or canbe networked together to form a single integrated system.In addition, software and hardware packages are availableto allow Easicheck systems to connect to a computer toprovide either a text based or graphical user interface forease of monitoring on large sites.

The diagram below represents a typical wiringarrangement for a networked Easicheck system connectedto a Central battery system. A comprehensive installationplanning guide is available on request to assist with thedetailed planning of an Easicheck installation.

Addressable testing

Data cable

Supply to emergency fitting

Network Cable

Optional PCInterface

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Static inverter detailed technical specification

The system includes all necessary features to comply with the requirements of BS EN50171: 2001 for Central System Supplies.Inverters are able to start the full load of a previously un-powered system, within the response time of EN1838 in mainsfailure mode.

Charger and Controls

Mains Supply: 230 ± 10% VAC 1 phase 50hz

Input Control: MCB to BS3871 Pt. 1, or BS4752 Part 1

Fusegear: HRC type to BS88

Terminals: DIN rail mounted near to cable entry

Transformer: Double wound with earth screen to BS171

Rectifier: Full wave controlled thyristor/diode bridge

Display Panel: Comprehensive LED and LCD display (see below for details)

Contactor: Standard contactors comply with the requirements of EN 60947-4-1

Charger: Constant voltage, current-limited type with electronic solid-state controller. Voltage is controlled towithin 2% of setting at up to 10% mains supply variations.

TemperatureCompensation:

Fitted as standard on all units with lead acid cells. The charger voltage is automatically adjustedwith reference to ambient temperature to optimise charging and battery life.

Boost Control: Manual boost/commissioning push button is fitted to units with vented batteries.

Test Push-button: Simulates mains failure

InverterOutput voltage:

Pre-settable in the range 220-240VAC. Unless otherwise advised, the output will be set at 230VAC.The voltage tolerance is 2% on loads of 0-100% of system rating.

Frequency: 50 or 60hz. ± 0.01%. Standard setting 50hz

Waveform: Sinusoidal

Voltage Regulation: Static 2%, dynamic 6%

Isolation: 1.5kv rms between input and output terminals

Total HarmonicDistortion: Less than 3% into a linear load

Power Factor: Will supply loads in the 0.3 lag - 0.3 lead range (0.7 lag - 0.7 lead for AC500 units)

Overload: 200% for 10 seconds, 125% for 20 minutes without reduction in output voltage

Start-up Time: Standard 30mS

Noise Level: Less than 55dBA at 1 metre

Efficiency: 85-89%

Protection:

DC input and AC output MCBsDC input reverse polarity protectionShort circuit protectionReverse-fed mains proof

Low voltage shutdown:

The inverter automatically shuts down when the battery discharges to a pre-set level. Re-set isfollowing a combination of the restoration of the mains supply and an increase in battery voltageabove the disconnect threshold level. Residual current drain when the disconnect circuit hasoperated is less than 1mA per module

Technology: Pulse width modulation with high frequency switching

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Display Indication

Power On Indicates that mains power is supplied to the charger, and to all connected sub-circuit monitors(LK1), and that no “brown-out” has occurred.

Maintained lights Indicating that mains power is supplied to the Maintained circuit, and that any switchingconnected to LK2 is closed

Float mode*Indicating that the charger is working in the constant voltage mode (and hence the charge currentis low or falling). Unless the Boost Mode indicator is also lit (see below) this indicates that thebattery voltage is at the preset float voltage

Current limit* Indicating that the charger is in constant current mode (and hence the battery voltage is rising).

Full charge*Indicating that the charger is in constant voltage mode (at float voltage unless the boost indicatoris also illuminated), and that the current has dropped to a low level (generally below 10-20% ofcurrent limit)

Boost mode*

(Not applicable to Valve Regulated Lead Acid types of batteries) - Indicating that the unit ischarging towards a target voltage about 20% higher than the preset float voltage. Depending onoptions selected at the design stage, this can be initiated automatically or manually. If automatic,it shall start and finish on preset voltage thresholds. If initiated manually, it shall be terminatedeither manually or by a timer. Manual operation shall be by means of two push buttons on theinternal PCB.

Mains fail*Indicating that mains power has failed (or dropped below the “brown-out threshold”) either tothe unit or to one of the sub-circuit monitors connected to it. The charger will then not beoperating, and the output will be supplied from the battery

Charge fail Indicates that battery voltage and charge current are both low.

Battery high volts Indicating that the battery voltage has risen above a preset threshold, normally 5% above floatvoltage

Battery low volts Indicates that the battery voltage has dropped below a preset threshold, normally 5% below floatvoltage

Earth fault* Indicating some leakage to earth (resistance approximately 5kohms or less) on any circuitconnected to the battery positive or negative.

Deep dischargeprotection

Indicating that the deep discharge protection circuit has operated, cutting off the output to avoiddamage to the battery. It shall remain illuminated until mains power has been restored AND thecondition has been acknowledged by pressing the Deep Discharge Protection Reset button

Inverter running Indicates that the inverter is providing an output of nominally 230VAC

Display current Changes the digital meter display from battery voltage to battery current

Display Temp* Changes the digital meter display from battery voltage to battery temperature

Mute buzzer An internal buzzer sounds when any alarm condition occurs, which can be silenced with this button

LCD Display Displays Battery voltage by default, will display charge/discharge current or ambient temperatureif above buttons are operated

* Not fitted on compact static inverter units (AC500...) See page 10 for details.

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Use the following procedure to select a correctly sizedstatic inverter:

1) Make a list of all the luminaires to be connected to the static inverter.

2) Note the quantity of fittings of each type.3) Establish the electrical supply details for each luminaire

type (the circuit watts and the circuit VA).4) Multiply each of these by the quantity of luminaires5) Add together the total Circuit wattage requirement

and the total circuit VA requirement.6) Add an allowance (recommend a minimum of 20%)

for future expansion.7) Select an inverter unit from the list opposite which is

capable of supplying both the required VA rating and the required wattage rating.

Notes1) Make sure you use the circuit watts of the fitting not

the lamp watts (with a switch start fitting, there can beas much as 40% difference between the lamp wattage and the actual circuit wattage of the fitting)

2) The circuit wattage of a HF fitting will be normally be substantially lower than that of an equivalent switch start fitting. If HF fittings are used instead of switch start fittings, the resulting inverter is likely to be significantly cheaper and smaller.

3) Fittings with a low Power factor have a much higher circuit VA than fittings with a high power factor.Using low power factor fittings on a static inverter will increase the size and cost of the static inverter unit.

4) Ensure any fitting selected for use as an emergency fitting complies with the product standard for emergency fittings (EN60598-2-22) note, that to comply with this standard glow starters, or lampswith built in starters must not be used, (use electronic starters instead).

Worked examplesIn the following examples the same fitting types have beenused in both cases, however in the first example, switchstart gear has been used as the basis for calculation, thesecond example, is based on HF gear. These examplesillustrate how the use of HF gear results in a smaller andcheaper static inverter unit.

Calculate the correct sized static inverter to support thefollowing load:55 x 58W battens21 x Twin 58W Weatherproof fittings20 x 8W Exit signs

Selecting the correct sized unit

Qty Type Circuit VA (ea) Circuit VA (Tot) Circuit Watts (Ea) Circuit Watts (Tot)

55 1 x 58W Switch start batten 79.3 4361.5 69 3795

21 2 x 58W Switch start weatherproof 158.6 3330.6 138 2898

20 8W Exit sign (HF) 11 220 9 180

Total connected load 7912.10 6873

Plus 20% spare 9494.52 8247.60

Qty Type Circuit VA (ea) Circuit VA (Tot) Circuit Watts (Ea) Circuit Watts (Tot)

55 58W High frequency batten 56.1 3085.5 55 3025

21 2 x 58W High frequency weatherproof 112.2 2356.2 110 2310

20 8W Exit sign (HF) 11 220 9 180

Total connected load 5661.7 5515

Plus 20% spare 6794.04 6618

Example 1 (Switch start gear)

Example 2 (HF gear)

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Having calculated the required system size, select a unit from the list below which has sufficient capacity to support therequired load (including the spare capacity), note bolts and VA wattage must be checked.Cooper Lighting and Security offers a wide range of static inverter systems, with ratings from 500VA to 30KVA. The list belowshows a number of popular sized units are available on short delivery lead times. For requirements outside this range, pleasecontact out central battery systems technical sales department, who will be pleased to provide further details.

Head Office

Cooper Lighting and Security Ltd, Wheatley Hall Road, Doncaster, South Yorkshire, DN2 4NB

Sales General Major Projects London Export

T: +44 (0)1302 303303 +44 (0)1302 321541 +44 (0)1992 787999 +44 (0)1302 303250F: +44 (0)1302 367155 +44 (0)1302 303220 +44 (0)1992 787222 +44 (0)1302 303251E: [email protected] [email protected] [email protected] [email protected] CC1285/03_07/10Kwww.cooper-ls.com

* contains Easicheck interface

Part Number Easicheck compatible Max output VA Max output Watts Standby hrs

1AC500VAM3 No 500 400 3

1AC500VAM3EC Yes 500 400 3

1ACSLX12503AP No 1250 1065 3

1ACSLX25003AP No 2500 2000 3

1ACSLX37503AP No 3750 3200 3

SK-AC4KVA-SLR3 No 4000 3400 3

SK-JAC4KVA-SLR3* Yes 4000 3400 3



SK-AC7-5KVA-SLR3 No 7500 6375 3

SK-JAC7-5KVA-SLR3* Yes 7500 6375 3



SK-AC10KVA-SLR3 No 10000 8500 3


Contact technical sales for details of cubicle dimensions (Tel: 01302 303221)

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CC1285/03_07 /10K

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