Osram HQI-E 150 W/NDL CL Technical Information download pdf (Page 37)

3

7

•

R

ate

d

current an

d

rate

d

vo

l

tage

Th

e soc

k

et must

b

e c

h

osen accor

di

n

g

to t

h

e

l

amp parameters.

Th

e rate

d

current

i

n t

hi

s case

i

s t

h

e

high

est cont

i

nuous

l

oa

d

current, an

d

t

h

e

rated volta

g

e is the hi

g

hest volta

g

e

f

or which the

soc

k

et

i

s

d

es

i

gne

d.

•

F

asten

i

n

g

parts

The connection parts, e.

g

. blade terminals, must

be chosen accordin

g

to the requirements

(

e.

g

.

temperature, current load, corrosion resistance

).

•

C

onnection leads

The connection leads must be rated accordingly

f

or the conditions o

f

use with re

g

ard to heat and

UV

-res

i

stance, mec

h

an

i

ca

l

stren

g

t

h

, e

l

ectr

i

c

s

tren

g

t

h

an

d

current carry

i

n

g

capac

i

ty

.

PTFE

l

ea

d

s are norma

lly

not su

i

ta

bl

e to

h

an

dl

e

ig

n

i

t

i

on vo

l

ta

g

e.

I

n pract

i

ce, s

ili

cone-

i

nsu

l

ate

d

leads with 3.6 mm outer diameter have

p

roven

e

ff

ective

f

or dischar

g

e lamps. For lamps with im

-

me

di

ate

h

ot re-

ig

n

i

t

i

on, s

ili

cone

i

nsu

l

at

i

on 7 mm

thick should be used to

g

ether with

f

iber

g

lass

i

n

l

a

y.

While the lamp is startin

g

up, it is possible

f

or the

s

tart-up currents to brie

f

l

y

exceed the nominal

va

l

ues

,

w

hi

c

h

must

b

e ta

k

en

i

nto cons

id

erat

i

on

wh

en rat

i

n

g

t

h

e soc

k

et.

U

p to 1.5 to 2x t

h

e oper-

atin

g

current can

f

low durin

g

the start-up phase

(

within the first 5 minutes of o

p

eration

).

• Isolation of

C

ontact

C

onnections

C

are must be taken to electricall

y

isolate the

connect

i

on contacts

i

n t

h

e

i

nsta

ll

at

i

on

p

roce

d

ure

i

f

this is not sa

f

e

g

uarded by the socket alone

.

•

L

am

p

pi

n

s

O

nl

y

use lamps with clean metallic contacts.

O

xidized contacts result in hi

g

h transition resis-

tances an

d

g

enerate

high

operat

i

n

g

temperatures.

The surface of the lam

p

p

ins must be smooth and

must not show an

y

visible traces o

f

mechanical

machinin

g

in the area o

f

contact with the socket

contact

,

as ot

h

erw

i

se t

h

e soc

k

et contacts can

b

e

d

ama

g

e

d.

7.4

Leads

t

o

lu

m

i

n

ai

r

es

T

he lead cables to the luminaires must be rated

f

or

their conditions o

f

use, takin

g

account o

f

adequate

h

eat an

d

UV

-res

i

stance, mec

h

an

i

ca

l

stren

g

t

h

, e

l

ectr

i

c

stren

g

t

h

an

d

current carry

i

n

g

capac

i

ty, as we

ll

as

gi

v-

in

g

due consideration to the e

ff

ect o

f

cable len

g

ths

(

e.g. when remote mounting is required

)

.

C

able resis-

tance

g

rows

li

near to ca

bl

e

l

en

g

t

h

.

Th

e resu

l

t

i

n

g

vo

l

t-

a

g

e drop across the cable reduces the e

ff

ective supply

volta

g

e. The e

ff

ects are described in chapter 3.1.3

“In

f

luence o

f

deviations in suppl

y

volta

g

e”.

V

arious

f

actors must be considered when choosin

g

l

ea

d

s

i

n t

h

e

l

amp c

i

rcu

i

t

:

•

Th

e vo

l

ta

g

e

d

rop across t

h

e

l

ea

d

d

epen

d

s on

the

f

lowin

g

current and can be reduced by usin

g

cable with a lar

g

er cross section

.

•

I

t

should

also

be

bo

rn

e

i

n m

i

n

d

t

ha

t

cable

r

esis

-

tance

i

ncreases w

i

t

h

high

er am

bi

ent temperature.

The resistance o

f

a copper cable rises b

y

about

10% for an increase in tem

p

erature of 25 °C.

•

C

onsideration must be

g

iven to the volta

g

e drop

i

n t

h

e out

g

o

i

n

g

an

d

i

ncom

i

n

g

ca

bl

e

.

• 230 V s

y

stems are more sensitive to additional

li

ne res

i

stance t

h

an 400

V

s

y

stems

.

I

n app

li

cat

i

ons

d

eman

di

n

g

t

h

e

l

owest poss

ibl

e co

l

our

scatter

i

n

g

, t

h

e supp

l

y con

di

t

i

ons s

h

ou

ld

b

e approx

i-

m

ate

l

y t

h

e same,

i

.e. supp

l

y vo

l

ta

g

e or

li

ne res

i

stance

should be e

q

uivalent

.

7.5

M

a

i

ntenance o

f

ligh

t

i

n

g

systems w

i

t

h

meta

l

h

a

lid

e

l

am

p

s

Since March 2003, the EN 12464-1 standard a

pp

lies

to interior li

g

htin

g

systems throu

g

hout Europe. I

f

a

ligh

t

i

n

g

system

i

s

b

e

i

n

g

p

l

anne

d

accor

di

n

g

to t

hi

s

stan

d

ar

d

,

i

t

i

s necessar

y

to

d

raw up a ma

i

ntenance

plan. This has to take into account in

f

luences causin

g

a drop in luminous

f

lux in the system durin

g

the course

o

f

the service li

f

e, such as dirt de

p

reciation o

f

lumi-

n

aires and the room itsel

f

, to

g

ether with the a

g

in

g

o

f

the lam

p

s and lam

p

f

ailures. The maintenance

f

actor

rep

l

aces t

h

e prev

i

ous p

l

ann

i

n

g

va

l

ue

.

Maintenance factor MF = LLMF x L

S

F x LMF x RMF

LLMF = lam

p

luminous flux maintenance factor

L

S

F = lam

p

survival factor

LMF = l

u

min

a

ir

e

m

a

int

e

n

a

n

ce

fac

t

or

RMF = r

oo

m m

a

int

e

n

a

n

ce

fac

t

o

r

C

AUTI

O

N!

C

ertain sockets such as

G

12 and E27

are use

d

f

or

diff

erent watta

g

e

l

eve

l

s.

Wh

en

i

nsert-

in

g

or exchan

g

in

g

lamps make sure that the ri

g

ht

lam

p

for the res

p

ective ballast is chosen.

O

ther-

w

i

se t

h

e

l

amp

i

s operate

d

i

ncorrect

ly

, an

d

t

h

e

soc

k

et ma

y

poss

ibly

not

b

e rate

d

f

or t

h

e

d

ev

i

at

i

n

g

o

peratin

g

conditions.

A

t t

h

e en

d

o

f

t

h

e

l

amp serv

i

ce

lif

e,

high

er tem-

p

eratures t

h

an norma

l

can occur

i

n t

h

e

pi

nc

h

area

cause

d

by

outer

b

u

lb

di

sc

h

ar

g

es.

Th

e soc

k

et must

be rated accordin

g

l

y

(

see also chapter 6.2.1 Leak

-

in

g

arc tube

)

.

Wh

en rep

l

ac

i

n

g

suc

h

l

amps, t

h

e soc

k

et must

a

l

wa

y

s

b

e c

h

ec

k

e

d

f

or s

ig

ns o

f

d

ama

g

e an

d

re-

p

l

ace

d

if

necessar

y

,

b

ecause a

d

ama

g

e

d

soc

k

et

wou

ld

a

l

so

d

ama

g

e t

h

e new

l

amp

.

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