Central battery system

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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, the

main ones being:

Simplified maintenance

Self contained emergency luminaires each incorporate

individual rechargeable batteries. The combination of

raised ambient temperature within typical luminaires and

continuous charging under mains healthy conditions

results in a normal battery life of around 4 years. At the

end of the battery life, each individual battery must be

replaced, this is a time consuming and disruptive process

often requiring the mains fittings to be dismantled to gainaccess to the battery.

With a Central battery system the battery is housed in a

secure cabinet in a suitable, easy to access location such as

a plant room. The batteries in a central battery system will

typically have a 10 year design life, and when replacement

is required they can be easily and quickly replaced.

On large systems with hundreds of emergency luminaires,

Central battery systems potentially offer massive savings in

maintenance cost and disruption.

Why central battery systems?

Integrated Emergency lighting

Static inverter type central battery systems are able to

power suitable unmodified mains luminaires at full power

during both mains healthy and mains failed conditions.

On projects with large open areas, particularly those with

high mounting heights, the use of mains fittings operating

at full output in emergency mode can greatly reduce the

number of emergency luminaires required. The use of

suitable standard unmodified mains luminaires also hasaesthetic advantages in many applications.


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System features

Modular inverterdesignIndividual inverter modules

can easily be removed for

maintenance or to reduce

weight 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 at

a glance

Temperature compensationwith digital displayAutomatically adjusts charger

voltage to optimise performance

and life in response to ambient

temperature.

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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 by

limiting the area affected by failure of an individual unit.

The compact 500VA static inverter system is ideal for use

as part of a distributed system, having a small footprint

and a lift off front cover, ideal for use in areas where access

space is limited.

Centralised or distributed systems

Cooper Lighting and Security manufactures a wide rangeof Central battery systems. Standard products include

static inverter systems with ratings from 500VA to 30KVA.

Smaller systems are ideal for providing emergency lighting

in small localised areas, e.g. Atriums where traditional

emergency lighting is not appropriate, alternatively

multiple small systems can be utilised, located at

convenient 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 is

also available, which have been specifically designed to

ensure compatibility with Cooper Lighting and Security

central systems. Alternatively ACM1 modules can be used

to enable suitable normal unmodified mains luminaires to

be utilised for both normal and emergency lighting

operation.

ACM1 modules can either be mounted inside the

designated luminaire, or housed in a remote enclosure.

When housed in a remote enclosure, the ACM1 can either

be used to control an individual luminaire or a series of

luminaires, that all share a common switched live under

normal mains healthy conditions.

The operation of the ACM1 module is described opposite.

Cooper Lighting and Security offer dedicated slave

luminaires, that have been purpose designed to operate

with static inverter systems, they have a light output and

distribution that has been optimised to provide typical

emergency lighting design values.

The use of these efficient low power luminaires can

significantly reduce the physical size, output rating and

cost of the static inverter system compared to the use ofadapted normal mains luminaires. ACM1 units can also be

used to control dedicated slave luminaires if either local

switching (see above) or non maintained operation is

required.

For non maintained slave operation, the ACM1 can be used

to hold off the supply to the dedicated emergency

luminaires until a mains failure occurs.

This is achieved by simply not adding a switched live

connection 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 greatly

simplify the testing and maintenance regime, by

automatically carrying out complete automatic testing of

the entire emergency lighting system and raising an alarm

when remedial work is required.

Easicheck removes the need for expensive, time consuming

manual testing of emergency lighting systems, and ensures

that a thorough, consistent test regime is implemented.

As well as carrying out regular testing of all connected

emergency luminaires, the Easicheck system continually

monitors the status of the central battery units to ensure

that key parameters such as battery voltage and charge

current are at the correct level.

The Easicheck system consists of a control panel (or series

of control panels on large projects) and an addressable

interface added to each emergency luminaire and control

device. An individual Easicheck panel can monitor and

control up to 250 addressable interfaces, each of which

could be either a luminaire, a control device or Central

battery system.

Where ACM1 modules are utilised to allow standard mainsfittings to also operate as emergency luminaires, special

addressable versions are available which have the same

functionality as normal ACM1 modules, but in addition

can be controlled by Easicheck for automatic testing

purposes. An additional interface is fitted to each central

battery unit to allow Easicheck to monitor critical

parameters and to activate discharge testing as required.

Control panels can operate on a stand alone basis or can

be networked together to form a single integrated system.

In addition, software and hardware packages are available

to allow Easicheck systems to connect to a computer to

provide either a text based or graphical user interface for

ease of monitoring on large sites.

The diagram below represents a typical wiring

arrangement for a networked Easicheck system connected

to a Central battery system. A comprehensive installation

planning guide is available on request to assist with the

detailed 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 mains

failure 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 OnIndicates that mains power is supplied to the charger, and to all connected sub-circuit monitors(LK1), and that no brown-out has occurred.

Maintained lightsIndicating 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 voltsIndicating that the battery voltage has risen above a preset threshold, normally 5% above floatvoltage

Battery low voltsIndicates 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 discharge

protection

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 the

condition 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 DisplayDisplays 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 luminaires

5) 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.

Notes

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

the lamp watts (with a switch start fitting, there can be

as 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 besignificantly cheaper and smaller.

3) Fittings with a low Power factor have a much highercircuit 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 lamps

with built in starters must not be used, (use electronic

starters instead).

Worked examples

In the following examples the same fitting types have beenused in both cases, however in the first example, switch

start gear has been used as the basis for calculation, the

second example, is based on HF gear. These examples

illustrate how the use of HF gear results in a smaller and

cheaper static inverter unit.

Calculate the correct sized static inverter to support the

following load:

55 x 58W battens

21 x Twin 58W Weatherproof fittings

20 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 below

shows a number of popular sized units are available on short delivery lead times. For requirements outside this range, please

contact 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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www.cooper-ls.com

CC1285/03_07/10K

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Central battery system