Phase Loss - Delta Elektronika SM15-200D Product Manual

SM3000
IN SU LA TION
18)
For safety the in su la tion of the sep a rat ing com po nents (trans -
form ers) be tween in put and out put is tested at 3750 Vrms dur ing
1 min ute. This is tested be fore as sem bling.
Warn ing! The 3750 Vrms can not be tested af ter wards on the
as sem bled unit be cause the in su la tion be tween the com po -
nents on the in put side to the case (like the bridge rec ti fier) is
spec i fied at 2500 Vrms. Since the in su la tion out put - case is low
(only 600 V DC) the in su la tion of the pri mary com po nents to
case will break down when 3750 Vrms is ap plied be tween in put
and out put (2500 Vrms + 600 V DC < 3750 Vrms) (see also fig. 3
- 17).
Note: when test ing the in su la tion, take care to charge and dis -
charge the ca pac i tors be tween in put - case and out put - case
slowly (e.g. in one sec ond). This to prevent high peak cur rents,
which could de stroy the power sup ply. Make sure to have dis -
charged the ca pac i tors com pletely be fore us ing it again.
RFI SUP PRES SION
19)
Both the in put and out put have RFI fil ters, re sult ing in very low
con ducted RFI to the line and load. Due to the out put fil ter the
out put volt age is very clean, hav ing al most no spikes.
OP ER ATING TEMP
20)
At full power the op er at ing tem per a ture range is –20 to +50 °C.
From 50 to 60 °C the out put cur rent has to be de rated lin early to
75 % at 60 °C (see fig. 3 - 18). These tem per a tures hold for nor -
mal use, i.e. the ven ti la tion open ings on the left and right side
must be free.
THER MAL PRO TEC TION
21)
A ther mal switch shuts down the out put in case of in suf fi cient
cool ing. Af ter cool ing down the unit will start work ing again.
The ther mal pro tec tion cir cuit pro tects 2 parts sep a rately in the
unit: the switch ing tran sis tors on the pri mary side and the out put
cir cuit.
A trip ped ther mal pro tec tion can have the fol low ing ef fects:
1) When the pro tec tion on the switch ing tran sis tors has trip ped,
no led in di ca tor or dig i tal me ter will burn on the front panel.
2) When the pro tec tion on the out put cir cuit has trip ped, the
OVP led on the front panel will burn, and the OVP sta tus out put
will be high.
HOLD - UP TIME
22)
The hold - up time de pends on the load, out put volt age and line
in put volt age. A lighter load, a lower out put volt age or a higher
line in put volt age all re sult in a lon ger hold - up time (see fig.
3 - 19).
TURN ON DE LAY
23)
The out put volt age is avail able 0.5 sec af ter mains switch on.
IN RUSH CUR RENT
24)
The in rush cur rent is lim ited by a 90 Ohm re sis tor, re sult ing in a
very low cur rent dur ing switch on. The in put cur rent dur ing
switch on will be lower than dur ing op er a tion at full load.

PHASE LOSS

25)
Phase loss means that there is only one phase avail able in stead
of three.
The unit will con tinue to op er ate on one phase but at 90% of the
max. out put volt age. Ex.: a SM30-100D on one phase 380 V can
de liver 90% x 30 = 27 V @ 100 A. So if the out put volt age is not
set higher than 27 V no drop in the out put volt age will be noted
dur ing phase loss. How ever the out put rip ple volt age will be
slightly higher when the in put is on one phase.
rev. February 2018
Hold-up time vs Vout with Vin as a parameter
DELTA ELEKTRONIKA B.V.
fig. 3 - 16
Re mote sens ing on a pul sat ing load
fig. 3 - 17
In su la tion test voltages
fig. 3 - 18
Op er ating tem per a ture ranges
fig. 3 - 19
DESCRIPTIONS
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