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Each power source, on its own, shall be capable of operating those parts of the smoke and heat control system for which it is intended.

If the secondary power source is not independently initiated (e.g. a fusible bulb operated single use CO₂ bottle), and if the primary power source fails, then the p.s.e. shall automatically switch over to a secondary power source. When the primary power source is restored, the p.s.e. shall automatically switch back.

Where there are two or more power sources, failure of one of the power sources shall not cause the failure of any other power source or the failure of the supply of power to the system.

If the switching from one power source to the other causes an interruption in supply of power, the duration of the interruption shall be specified in the manufacturer’s data (see Clause 9).

The p.s.e. shall be classified as either:

Class A - suitable for use with all systems; or

Class В - suitable for use with fail safe systems only.

The secondary power source may also be used for other functions, e.g. day to day comfort ventilation. When used in this way the p.s.e. shall ensure that sufficient power is retained for emergency use as specified in Clause 6, e.g. by preventing further use for the other functions.

NOTE 1 The compatibility of a separate p.s.e. with other equipment, for example the c.p., should be taken into account by the system designer.

Key

1. mains in

2. power supply equipment (p.s.e.)

3. control panel (c.p.)

4. actuator

Pneumatic

Electrical requirement Electrical Optional

NOTE Pneumatic p.s.e. may be compressor set, air receiver or gas bottle as appropriate.

Figure 2 — Examples showing typical locations and interrelationships of pneumatic p.s.e. with other
components of a smoke control system

Compressors used for supply of power to a smoke and heat control system shall conform to EN 60204-1, EN ISO 12100-1 and EN ISO 12100-2.

Air receivers used for supply of power to a smoke and heat control system shall conform to EN 286-1.

Multiple use gas bottles used for supply of power to a smoke and heat control system shall conform to EN 13293 or EN 1964-1 and Guideline 84/525/EWG.

Multiple use gas bottles shall contain air, CO₂ or N₂.

The filling factor for multiple use CO₂ bottles shall be as follows, depending upon the maximum ambient temperature:

• 50 °С: filling factor 0,75 kg/l at a maximum ambient temperature of 50 °С;

• 68 °С: filling factor 0,71 kg/l at a maximum ambient temperature of 68 °С;

• 93 °С: filling factor 0,58 kg/l at a maximum ambient temperature of 93 °С.

The maximum operating pressure when the bottle is filled with CO₂ shall not exceed the maximum rated

pressure for the bottle.

The maximum filling shall not exceed 30 kg.

The valve shall be designed to empty the gas charge in the bottle completely. Back pressure valves or valves allowing negative operating conditions are not permitted.

The bottle shall be equipped with a pressure relief valve or a burst cap. The relief pressure shall exceed 350 bar and shall be less than the burst pressure of the bottle. The pressure relief device shall have sufficient capacity to prevent rupture of the bottle.

Single use gas bottles used for supply of power to a smoke and heat control system shall conform to EN 12205 or ADR 2003. When the gas bottle is refillable, it shall conform to EN 13293 providing that the capacity is not more than one litre.

Single use gas bottles shall contain CO₂ or N₂.

The filling factor for single use CO₂ bottles shall be as follows, depending upon the maximum ambient temperature:

• 50 °С: filling factor 0,75 kg/l at a maximum ambient temperature of 50 °С;

• 68 °С: filling factor 0,71 kg/l at a maximum ambient temperature of 68 °С;

• 93 °С: filling factor 0,58 kg/l at a maximum ambient temperature of 93 °С.

The maximum operating pressure when the bottle is filled with CO₂ shall not exceed the test pressure.

The maximum filling shall not exceed:

• 1 500 g at 50 °С maximum ambient temperature;

• 150 g at 68 °С maximum ambient temperature;

• 120 g at 93 °С maximum ambient temperature.

The filling pressure at 15 °С shall be as follows, depending upon the maximum ambient temperature:

• 50 °С: 150 bar for a maximum ambient temperature of 50 °С;

• 68 °С: 13,5 bar for a maximum ambient temperature of 68 °С;

• 93 °С: 12,5 bar for a maximum ambient temperature of 93 °С.

The maximum operating pressure when the bottle is filled with N₂ shall not exceed 2/3 of the test pressure.

The maximum bottle volume shall be:

• 1,0 I at 50 °С nominal temperature;

• 0,3 I at 68 °С nominal temperature;

• 0,3 I at 93 °С nominal temperature.

The cap or disc shall be designed to serve as a pressure relief device. The relief pressure shall exceed 350 bar and shall be less than the burst pressure of the bottle. The pressure relief device shall have sufficient capacity to prevent rupture of the bottle.

The bottle shall be protected from corrosion by zinc plating or grey paint.

6 Functions

When operated from the primary power source, the p.s.e.:

1. shall be capable of operating in accordance with the specification given in the manufacturer’s data, irrespective of the condition of the secondary power source; and

2. if batteries are used as the secondary power source, shall be capable of continuously supplying the maximum standby current l_maxa and simultaneously charging and monitoring a battery discharged to its final voltage.

NOTE When operated from the primary power source, the p.s.e. may allow battery charging to be limited or interrupted when the p.s.e. is delivering a short duration maximum output current (Ітахь, see note to Table 5).

NOTE 1 To allow for possible failures of equipment or of the incoming mains supply, the secondary supply should be capable of maintaining the system in operation for at least 72 h, unless provision is made for immediate notification of failure, either by local or remote supervision of the system, and a repair contract is in force giving a maximum repair period of less than 24 h. In this case the minimum standby capacity may be reduced from 72 h to 30 h or may be further reduced to 4 h if spares, repair personnel and a standby generator are available on site at all times.

NOTE 2 At the end of the maximum standby period if dead lock is required, the residual power should be capable of operating the system (including deadlock) in accordance with the requirements of prEN 12101-9.

1. rechargeable;

2. suitable to be maintained in a fully charged state;

3. constructed for stationary use;

4. marked with type designation and date of manufacture.

If the battery is mounted in an area which houses other smoke and heat control system equipment, then the battery shall be of the sealed type and shall be mounted in accordance with the manufacturer’s data.

1. battery can be charged automatically;

2. battery discharged to its final voltage can be recharged to at least 80 % of its rated capacity within 24 h and to its rated capacity within another 48 h;

3. charging characteristics are within the battery manufacturer’s specification over the ambient temperature range of the battery.

Except for currents associated with battery monitoring, the battery shall not discharge through the charger when the charging voltage is below the battery voltage.

NOTE If the c.p. requires an external power supply to be maintained at all times then the generator set should operate immediately on loss of the primary power supply, regardless of fire or standby condition.

• automatic operation;

• test condition for the testing of all automatic operations, which can be divided into test condition with load acceptance and test condition without load acceptance. In case of a power failure during the test, the load acceptance shall take place automatically;

• full manual operation for: Start, Stop, Generator On-Off, Net On-Off;

• disablement of any generator condition, e.g. during maintenance services;

• Emergency Off.

Class A p.s.e. shall be capable of recognising and signalling the following faults:

1. loss of the primary power source, within 30 min of the occurrence;

2. loss of the secondary power source, within 15 min of the occurrence;

and in addition for Class A battery systems:

3. reduction of the battery voltage to less than 90 % of the final voltage, within 30 min of the occurrence;

4. loss of the battery charger, within 30 min to the occurrence, except where the charger is switched off or limited as defined in 6.1 c);

and in addition for generator sets:

5. battery voltage too low;

6. start failure;

7. motor temperature too high;

8. lubricating oil pressure too low;

I) overspeed;

10. generator - excess current;

11. low fuel level (sufficient for less than 3 h operation).

For Class В p.s.e., signalling is not required, but if provided it shall conform to the requirements given in a) to d).

If the p.s.e. is housed separately from the c.p. then at least a common fault output for the faults listed in a) to d) shall be provided.

If the p.s.e. is housed within the cabinet of the c.p., then the faults listed in a) to d) shall be indicated at least as a common fault in accordance with prEN 12101-9.

Where indication of standby function is provided, the indication shall be green.

NOTE Where a SHEV contains an integrated p.s.e. and c.p., any indication provided solely for maintenance purposes, even if permanently lit when power is supplied, may be of any colour.

If Class A p.s.e. is designed to be used with a c.p. contained in a separate cabinet, then an interface shall be provided for at least two transmission paths to the c.p. such that a short circuit or an interruption in one does not prevent the supply of power to the c.p.

6.5 Power supply from compressed gases

If Class A p.s.e. is designed to be used with a c.p. contained in a separate cabinet, then an interface shall be suitable for connection of metallic tubing.

The compressor shall provide compressed air to an air receiver, not direct to the c.p.

Each compressor shall be capable of filling the air receiver from atmospheric pressure to full rated pressure within a period of 60 min.

NOTE 1 Capacity requirements for air receivers should be selected in accordance with the requirements valid in the place of use.

Operation of the compressor shall be controlled automatically from air receiver pressure.

NOTE 2 Where two compressors provide primary and secondary supplies to an air receiver, the control system may be arranged so that under normal conditions the compressor in use alternates and/or both compressors operate together.

The air receiver shall be provided with:

• non-return valve to supply from compressor;

• air pressure gauge;

• adjustable air pressure switch for low pressure alarm;

• outlet shut off valve, lockable open and closed.

Class A p.s.e. shall be capable of recognising and signalling the following faults:

• low pressure, at 10% below compressor cut in pressure, within 15 min of the occurrence;

• continuous compressor operation of more than 60 min.

For Class В p.s.e. signalling is not required, but if provided it shall conform to the requirements above.

The minimum quality of compressed air supply shall be as defined in Table 1.

Table 1 — Minimum air quality according to ISO 8573-1

Where air pressure is provided to a smoke and heat control system that does not fail to the operational position on loss of pressure from a non-dedicated air supply (e.g. a factory compressed air system), then air pressure for the smoke and heat control system shall be stored in a dedicated air receiver.

NOTE 1 Capacity requirements for air receivers should be selected in accordance with the requirements valid in the place of use.

NOTE 2 Use of an air receiver is recommended regardless of failure mode of the smoke and heat control system.

The air receiver shall be provided with:

• non-return valve to air supply;

• air pressure gauge;

• adjustable air pressure switch for low pressure alarm;

• outlet shut off valve, lockable open and closed.

Class A p.s.e. shall be capable of recognising and signalling low pressure within 15 min of the occurrence.

NOTE 3 The air pressure switch should be set to operate at 10 % below the normal minimum supply air pressure.

Air receivers designed to operate only one SHEV and to be located within or adjacent to the SHEV do not require the gauge, pressure switch or shut off valve.

The power supply shall be provided from either:

1. gas bottles permanently connected to the system and capable of providing multiple operations of the smoke and heat control system; or

2. single use gas bottles held disconnected and capable of operating the SHEV or smoke and heat control system once only under fire conditions.

NOTE Capacity requirements for gas bottles should be selected in accordance with the requirements valid in the place of use.

Multiple use gas bottles shall be provided with:

• gas pressure gauge;

• gas pressure switch for low pressure alarm or weighing device for low gas weight alarm;

• outlet shut off valve, lockable open and closed.

Single use gas bottles shall be provided with:

• trigger mechanism conforming to the requirements of prEN 12101-9 to connect the gas bottle to the SHEV or smoke and heat control system upon failure of a fusible device or receipt of an actuation signal,

• visible indication of operation.

7. Materials, design and manufacture

   1. Mechanical design

      1. The housing of the p.s.e. shall have a minimum IP rating in accordance with the environmental class as specified in Table 2.

      2. The p.s.e. shall be housed either:

1. in a separate housing; or

2. in housings associated with other smoke and heat control system equipment.

• re-configure the site specific data held within the p.s.e. or controlled by them; and/or

• maintain the p.s.e. in accordance with the manufacturer's published instructions and data.

All outputs shall have appropriate power limitations (e.g. fuses, electronic circuits) in order to ensure that in case of external short circuits no danger exists because of heat production.

7. Classification

The p.s.e. shall be classified according to the intended in-use environmental conditions as shown in Table 2.

Table 2 — Classification of p.s.e.

9 Documentation

The manufacturer shall prepare installation and user documentation. This shall comprise at least the following:

1. general description of the equipment;

2. technical specifications of the inputs and outputs of the p.s.e., sufficient to permit an assessment of the mechanical, electrical and pneumatic compatibility with other components of the system (as described in other Parts of EN 12101) including:

1. for electrical p.s.e.:

1. power requirements for recommended operation;

2. maximum and minimum electrical ratings for each input and output;

3. fuse ratings;

4. types and the maximum and minimum capacities of the batteries suitable for use with the p.s.e.;

5. maximum allowed current drawn from the battery when the primary power source is disconnected;

6. maximum interruption time during switching between power sources;

2. for pneumatic p.s.e.:

1. maximum and minimum electrical ratings for any electrical input and output (if provided);

2. maximum output pressure;

3. storage capacity (by mass or volume);

4. fuse ratings (if applicable);

3. installation information, including: