I-800I-01.doc
Issue
06
November
2013
4
IOM –
844I, 854I & 864I - SS FLOODLIGHTS (IND)
3.9 Electrical
Fault
Finding and Replacement
Control gear will not normally go open circuit unless it has first overheated; the signs of this are obvious, being
severe discoloration of the paint of the gear and cracks in any exposed insulation. Similarly, a bad contact at the
lamp cap will usually result in discoloration as a sign of overheating.
Any fault finding must be carried out by a competent electrician. With HPS the ignitor can become faulty. If the
lamp is fitted, the choke has continuity and the connections are good and correct, they should produce an
attempt to start effect in the lamp and a buzzing sound from the ignitor.
It will be unusual not to have other parts available to perform a substitution fault finding routine and this is the
normal procedure. Before re-assembling, all connections should be checked and any damaged cable replaced.
The ignition connection to the lampholder is sleeved with H.T. sleeving and this must be kept in place.
4.0 Overhaul
The unit is largely made of material which are very corrosion resistant. This allows the unit to be completely
stripped, mechanically cleaned, then re-built with new electrical parts as required. The internal wiring is 1.0mm²
flexible, silicone rubber insulated. If the cover gasket has deteriorated by softening or permanent set, a new
cover assembly should be fitted, all components can be obtained from Chalmit.
5.0 Fuse
Ratings
The fuse ratings for HID lamp circuits need to take account of three components of circuit current. Current
inrush to PFC capacitors which can be up to 25x the rated capacitor current and last 1-2 millisecs; lamp starting
current including steady capacitor current which together may decline from up to 200% of normal at 10 seconds
after switch on to normal after 4 minutes; rectification effects caused by asymmetrical cathode heating for a few
seconds after starting, this effect is random and very variable. With the availability of MCBs with a wide range of
characteristics, the individual engineer can make a better judgement of what is required. The normal capacitor
current will probably be the determining factor 0.076A per
F at 240V, 50Hz (adjust for other volts by
multiplication, x 6/5 for 60Hz). For HBC fuses use 1.5 x normal capacitor current.
All calculations must satisfy wiring regulations.
Note:
Starting and running currents for 240V, 50Hz are as indicated in TABLE 1.
A conventional matrix for HBC fuses is outlined in TABLE 2.
6.0
Disposal of Material
The unit is made chiefly from inert incombustible materials. The capacitor is of the dry film type and does not
contain PCB’s. The control gear contains plastic parts and polyester resin. The ignitor contains electronic
components and synthetic resins. All the electrical components may give off noxious fumes if incinerated. Care
must be taken to render these fumes harmless or avoid inhalation. Any local regulations concerning disposal
must be complied with. Any disposal must satisfy the requirements of the WEEE directive [2002/96/EC] and
therefore must not be treated as commercial waste. The unit is mainly made from incombustible materials. The
control gear contains plastic, resin and electronic components. All electrical components may give off noxious
fumes if incinerated.
6.1 Lamps
Discharge lamps in modest quantities are not "special waste". The outer envelope should be broken in the
container to avoid injury.
This applies to the UK, there may be other regulations on disposal operating in other countries.
Important:
Do not incinerate lamps.
To comply with the Waste Electrical and Electronic Equipment directive 2002/96/EC the
apparatus cannot be classified as commercial waste and as such must be disposed of or
recycled in such a manner as to reduce the environmental impact.