INSTALLATION
ALL OPERATIONS DESCRIBED IN THIS SECTION MUST BE CARRIED OUT BY QUALIFIED PERSONNEL
ONLY.
The company assumes no responsibility for any damage caused by flawed connections or by operations
that are not described in this manual.
S
TORAGE OF THE
UPS
The storage area must respect the following characteristics:
Temperature:
0°÷40°C (32°÷104°F)
Relative humidity degree:
95% max
P
REPARATION FOR INSTALLATION
PRELIMINARY INFORMATION
UPS Models
MST 30
MST 40
Nominal power
30kVA
40kVA
Operating temperature
0 ÷ 40 °C
Max. relative humidity during operation
90 % (no condensation)
Max. installation height
1000 m at nominal power rating
(-1% power for every 100 m over 1000 m)
max 4000 m
Dimensions W x D x H
440 x 850 X 1320 mm
Weight with no batteries
135kg
145kg
Weight with batteries
340kg
350kg
Dissipated power with nominal resistive load
(pf=0.9) and buffer battery
(1)
1.4 kW
1205 kcal/h
4780 B.T.U./h
1.5 kW
1290 kcal/h
5120 B.T.U./h
Dissipated power with nominal distorting load
(pf=0.7) and charged battery
(1)
1.34 kW
1150 kcal/h
4565 B.T.U./h
1.35 kW
1160 kcal/h
4605 B.T.U./h
Flow rate of the fans to remove heat from the
installation area
(2)
750mc/h
800 mc/h
Current dispersion to earth
(3)
< 50 mA
Protection level
IP20
Cable input
On the rear from the bottom
(1) 3,97 B.T.U./h = 1 kcal/h
(2) The following formula can be used to calculate the air flow rate: Q [mc/h] = 3,1 x Pdiss [kcal/h] / (ta - te) [°C]
Pdiss is the power expressed in kcal/h dissipated by all the devices installed in the installation environment.
ta= ambient temperature, te=external temperature. In order to take leaks into account, it is necessary to increase
the value obtained by 10%.
The table shows an example of a flow rate with (ta - te) =5°C and a rated resistive load (pf=0.9).
(Note: This formula is applicable only if ta>te. If not, the UPS installation requires an air-conditioning system).
(3) The dispersion current of the load is added to that of the UPS on earth wire.
