INSTALLATION
SM3300
12 / 30
DELTA ELEKTRONIKA B.V.
rev. Jan. 2022
5
INSTALLATION
Warning!
carefully read the chapter "Safety Instructions" in
this manual before connecting or operating the unit!
5.1
HUMIDITY & CONDENSATION
During normal operation, humidity will not harm the power
supply, provided the air is not aggressive. The heat normally
produced in the power supply will keep it dry.
Avoid condensation inside the power supply, to prevent
break-down. Condensation can occur during a period the
power supply has been switched off (or operating at no load)
and the ambient temperature is increasing. Always allow the
power supply to dry before switching it on again.
5.2
TEMPERATURE & COOLING
The storage temperature range is
–40 to +85 °C.
The operating temperature range at full load is
–20 to +50 °C.
This temperature range only holds when the air-intakes and
air-outlets are unobstructed and the temperature of the air-
intake is not higher than +50 °C.
When the power supply is mounted in a cabinet, please note
that the temperature of the air-intake should be kept low and
avoid a short circuit in the airflow i.e. the hot air leaving the
air-outlets entering the air-intakes again.
Please note: a lower temperature extends the lifetime of the
power supply.
5.3
19" RACK MOUNTING
On both sides in the rack, mount a proper support slide that
can hold the weight of the unit. It is advised to use a separate
slide for each unit.
After placing the unit on the slide, add all 4 screws to mount
the front panel of the power supply to the vertical rack posts.
Use proper screws intended for keeping equipment of this
weight in position.
Assuming the rack is deliberately designed for the weight,
stacking of the units is allowed without limitations. See
previous paragraph for cooling instructions.
5.4
CONNECTING THE UNIT
Warning!
Never make connections to the Power Inputs and
Outputs or the Sense Connector when the unit is connected
to the mains supply or power outlet!
Safety covers are used to cover these in- and outputs.
Observe the following when removing a safety cover:
Switch off the unit and disconnect from the mains supply.
Wait for 5 minutes to allow internal capacitors to discharge.
Unscrew the screws and remove the safety cover.
Place the safety cover back on the unit before connecting it to
the mains supply again.
Warning!
Some components inside the power supply are at
AC voltage even when the On/Off switch is in the off position.
Therefore a readily accessible, appropriately rated,
disconnect device shall be incorporated external to the
equipment.
The power supply shall be connected to the main supply via a
protection device with a rating of maximum 16A. For example
a circuit breaker or fuses etc.
5.4.1
AC POWER TERMINALS (AC-MAINS)
This connector is located at the rear side, marked as CON D.
Use a cable with a diameter of 2.5mm2 for each wire. Use a
cable with a sufficient voltage rating for the input voltage of
the unit.
Use the included 4-pole header with the markings L1, L2, L3
and PE for connecting the wire to the unit. The mounting
torque for the header terminals is 0.6Nm.
Always connect the PE terminal to the Protective Earth.
The unit can operate on a single phase or a 3 phase grid (see
fig. 4 - 2), see the chapter 'Specifications' for the minimum
and maximum values.
fig 5 - 2
The 3 phase and 1 phase connections for AC Mains.
fig 5 - 1
Insert the included 4-pole header in CON D
for the connection of the AC power / Mains.
Power Supply:
Grid:
Unit
DC Output
cable [mm
2
]
Bolts
Torque
[Nm]
SM18-220
70
M8
20
SM66-AR-110
35
M8
20
SM100-AR-75
25
M8
20
SM330-AR-22
4
M8
20
SM660-AR-11
2.5
M8
20
table 5 -1
Recommended cable diameters and mounting torque.
