Osram HQI-E 150 W/NDL CL Technical Information download pdf (Page 22)

The new round ceramic arc tube

(

WERBAL

)

has

a uni

orm wall thickness without thick ceramic plugs

n t

e c

yli

ceram

c t

pe.

e mass

s t

ere

ore onl

about hal

that o

the c

lindrical version. This

means less ener

y and there

ore less time is needed

to brin

the P

WERBALL ceramic arc tube up to op-

eratin

temperature. The times required to achieve the

lit-up status are there

ore clearl

shorter than in the

vers

on, as s

own

Fig

. 23

HQI-T 150 W at OSRAM PTU

HQI-T 150 W at CCG

Luminous flux in lm

Time in s

. 24: Start-up behavior of luminous flux of a HQI

t v

ious

ballas

Luminous flux in lm

Time in s

cylindrical HCI-T 150 W

. 23: Start-up behavior of luminous flux in various

etal halide lamps operatin

with an

RAM elec

ast

e t

t ta

es to reac

a stea

state

epen

s on

e start-up current an

e assoc

ate

wattage

nput.

the current is too hi

h, the electrodes will be dam

aged, causing the walls to blacken. The standard

metal halide lam

(

61667

)

therefore limits the

start-up current to tw

ce t

e nom

amp current.

With

RAM P

WERTR

, the start-u

aste

than with a conventional ballast

as shown in the

ol-

Fig

. 24

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 55 56

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Osram HQI-E 150 W/NDL CL Technical Information Page 22

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