Sitemap | Home | Previous page

EMERGENCY LIGHTING - CENTRAL POWER SUPPLY SYSTEM

Central Battery Systems are predominantly used in medium or large installations for a multitude of uses, but there would normally be a high number of luminaires, extreme ambient temperatures and/or requirements for central control.

Central Battery Systems

We can supply a comprehensive range of systems of which just a small selection is shown here. We can provide engineered solutions tailored to customer’s specific requirements. Central Systems offer solutions where all power charging circuits and batteries are centrally located and all luminaires are connected via protected cabling. Maintained or Non-maintained.

  • Unique design cubicles allow easy access for installers
  • Removable covers enable installation in confined space
  • Separate battery & charger compartments
  • Removable charging chassis in case of modification
  • Contactors to BS5424 or BS764
  • Battery options: Flat Plate Lead Acid, Plante Lead Acid, Nickel Cadmium, Valve Regulated Sealed Lead Acid
  • 24v, 50v, 110v DC variants
  • Wide range of Slave Luminaires

OPTIONAL EXTRAS

  • BS Contactor Earth Fault Monitor
  • Engineer's Test Key
  • Fire Alarm Relay
  • Low Voltage Disconnect
  • Dual Contactor
  • Night Watchman's Switch
  • Double Pole Fused Output
  • Phase Fail Relays
  • Time Switch
  • Digital Meters
  • Sub-Circuit Relays
  • Hold-Off Relays

HEALTH AND SAFETY

When lead acid and nickel cadmium wet cells are being charged they give off a potentially explosive mixture of oxygen and hydrogen. Always ensure adequate ventilation when installing equipment in confined areas and display signs warning against smoking and naked flames.

Secure Power Supply

CONSTANT VOLTAGE CHARGER
DC UPS
SWITCH TRIPPING & CLOSING
FLOATING SYSTEMS

A comprehensive product range. Manufactured to be compliant with client specifications particularly in Power Generation, Water Industries and Rail Applications.

A secure DC power source that can be configured to meet the most exacting requirements.

  • Free standing or wall mounted
  • DIN size enclosures - front access only
  • Single or Three phase Input
  • DC Outputs up to 500 Amps
  • All battery styles accommodated
  • High IP rating
  • Special paint finishes

ADVANTAGES

  • Choice of duration (1-3 hours)
  • Increased light levels
  • Ease of maintenance
  • Ease of testing
  • Ease of battery replacement
  • Central control of luminaires
  • Luminaires can operate in a wide range of ambient temperatures

MODE OF OPERATION

  • Non-Maintained: Load is not normally energised but upon mains failure it is energised via the battery. This is AC and DC output.
  • Maintained: Load is energised at all material times via lighting transformer and upon mains failure via the battery. This is AC and DC output respectively.
  • Floating: Load is supplied from permanently connected battery/charger. This is DC output.

LOAD

The battery systems should not be fully loaded and so as to ensure maximum battery life we would recommend the design load of the system to be up to 80% of the maximum rating.

CABLE SIZES

Volt drop in cable runs must be calculated before deciding on the systems voltage. Fire protected cables must be used, we would recommend that you consult the appropriate experts if in doubt.

BATTERY VOLTAGES

24, 50 and 110v are the nominal voltages generally available and utilised. 240v is appropriate on large installations where volt drop and current levels need to be kept within certain limits.

BATTERY TYPES

  • Valve Regulated Lead Acid
    State of the art sealed lead acid technology using a design where the acid is immobilised in a sponge like material. During the life of the battery there is no loss through gassing as cells are completely sealed.
    Service life of 10 years.
  • Flat Plate Lead Acid
    Low internal resistance, excellent regulation, easy to check and reasonable neglect tolerance.
    Service life 12-15 years.
  • Nickel Cadmium
    Extremely robust, will tolerate arduous operating conditions and both electrical and mechanical abuse. Easy to check, can be left discharged without damage.
    Service life up to 25 years.
  • Plante Lead Acid
    High performance cells, exceptionally reliable trouble free service when well maintained. Easy to check, low maintenance the cells retain 100% capacity throughout their life and provide excellent performance at high or low levels of discharge.
    Service life up to 25 years

CENTRAL POWER SUPPLY SYSTEMS
(CENTRAL BATTERY SYSTEMS)

Central Power Supply Systems (Central Battery Systems) provide the emergency power to a number of connected (slave) luminaires. The Central Power Supply Systems (Central Battery Systems) should be connected to the luminaires via a fire protected cable as specified in BS5266.

Due to the complex nature of Central Power Supply Installations (Central Battery Installations) it is strongly recommended that the complete installation is reviewed by a competent person, fully trained in such installations.

Central Power Supply Systems are deemed to comply with the requirements of the Fire Precautions (Workplace) Regulations 1997 if:

  1. They are designed and manufactured in accordance with the appropriate product standard prEN 50171.
    or
  2. Checked and validated by a competent person as fit for purpose and installed in accordance with the requirements of BS5266.

ICEL provides a scheme of product registration for Central Power Supply Systems (Central Battery Systems), ICEL 1009, assuring users that products carrying the ICEL registration mark, produced by the registered organisation, have been designed in accordance with the requirements of prEN50171, batteries are correctly specified to achieve the full rated discharge for their design life and that the equipment has been manufactured in a facility operating a suitable scheme of quality assurance.

SYSTEM DESIGN

The following are guidelines only but would normally reflect the basics of a well designed system. Your major requirement is to activate the emergency lighting in either local or complete mains failure.

  • A non-maintained system would utilise sub-circuit monitors, this ensures via a series of relays, that all emergency lighting luminaires would be activated wherever failure may be.
  • A maintained system is quite simply energised at all material times therefore the luminaires are illuminated irrespective of their condition.
  • A maintained system with hold off relays allows you to illuminate certain local areas of the building upon mains failure whilst the remainder operates under mains healthy conditions. In a complete mains failure all luminaires would be active in the emergency mode.
  • A maintained AC/DC system with conversion modules housed within chosen luminaires. The luminaire then operates in mains healthy and to a reduced level of brightness in emergency mode.
  • A static inverter runs conventional mains fittings at full brightness under mains healthy or emergency operation
-
© 2007 - Fire & Security Solutions Ltd - All Rights Reserved
Fire and Security Solutions Ltd, 4 Wootton Green, Bedfordshire MK43 9EE, United Kingdom
Mobile: +44 (0) 7917134740 Telephone: +44 (0) 1234 766121 Email: enquiries@fireandsecuritysolutions.co.uk