- 4 -
IM-ENG-114/GB
Fig. 1.
Operative area of PS1550 system.
The Power Modules are thermally protected. If temperature exceeds 85 °C at ‘baseplate’, the Modules deactivate
until correct operative conditions are restored. Such conditions set off alarm relay.
The chassis is fitted with 3 fans, 100 m3/h each for a total air flow of 300 m3/h. These values permit the system to
function at maximum power up to an ambient temperature of 50 °C while with nominal load the curve is that repor-
ted in figure 1. The fans are housed in the lower part of the chassis and are all mounted on a sliding box; they can
be removed easily by extraction via the hinged panel situated at lower front side. When the panel is opened, a mi-
croswitch interrupts power supply to fans permitting easy access without risk.
If one of the fans breaks down, the corresponding green LED function indicator is set OFF and the alarm relay is
activated.
4.3 SPECIFICATIONS
I N P U T
- Input voltage (Line 1 and/or Line 2)
- AC: 230 Vac nominal ±15% (195 ÷ 264 Vac) at 47 ÷ 63 Hz.
- AC: 115 Vac nominal ±15% (97.5 ÷ 132 Vac) at 47 ÷ 63 Hz.
- DC: 130 Vdc nominal (100 ÷ 180 Vdc).
- PS1550 Versions
Two versions of the system have been foreseen:
- Type-230: version with alternating input voltage both at 230 Vac.
- Type-115: version with input voltage at 115 Vac and/or 130 Vdc.
- Input current in stationary conditions and nominal (rated) load (36 A)
- AC 230 Vac: 6.6 A rms (17.0 A peak).
- AC 115 Vac: 12.1 A rms (25.5 A peak).
- DC 130 Vdc: 9.0 A.
25
°
C
45
°
C
0
°
C
36A
Natural
convection
Forced
ventilation
T
AMB
65
°
C
18A
I
LOAD
0A
