Schaefer Series C/B 4800 User Manual
Page 12
www.schaeferpower.de
Technical Notes
Technical Notes
Mounting & Installation
Mounting
Air flow
Airflow to the power supply is preferred to be filtered, below 55°C, an airflow resistivity
(pressure drop) of below 20kPa and is required to comply with the EN60950 pollution
category II. Diffused thermal energy is required to be exhausted and displaced by air as
detailed above. Thermal management is required where the air provided to a power
supply complies with the power supply’s design parameters. The use of fans requires the
increase airflow rate to a minimum of 120m
3
/h (corresponding to 70 cfm). The airflow
resistivity and respective pressure drop should be considered when the fan is required.
Direction of air flow
Typically, Schaefer Modules and systems are cooled through air supply entering below
and exiting above, with the exception of models of series C/B 5100, 5200, 5300, 5400,
6400 and 6600 whose airflow is from front to back.
Custom design also offers lateral cooling. Such details are however, project specific.
Cabinet
To enhance a module / system, a cabinet may be employed.
- This may be required to fulfil the increased IP / NEMA rating, due to a negative effect of
the environment on the solution.
- Specifically, in an unclean, saturated, corrosive or otherwise aggressive air quality it
may be required to employ a cabinet in combination with features such as hermetical
closure and air exchange amongst others.
- The enclosure must be capable of sustaining the weight of the modules, specifically if
module support rails are used.
- Stationary cabinets should be fastened to the ground.
- The centre of gravity must be as low as possible with portable systems.
Transportation of module
The grips on the front of the modules are to assist in module insertion into a sub-rack,
and not for supporting the weight of the module.
Wall mount / chassis mount
Modules with a mounting plate or angle are designed for integration into the host
equipment. They are not for employment outside of an enclosure.
H15 Female Connector
Number of contacts:
15
Contacts:
Fastons or screw terminals
Operating current at +20 °C:
15 A
Operating temperature:
– 55 to +125 °C
Test voltage (contact to contact):
3100 V
rms
Test voltage (contact to ground):
3100 V
rms
Contact resistance:
8 mΩ
Performance according to:
IEC 60603-2 / DIN 41612
High Current Female Connector
Number of contacts:
2
Contacts:
Bolts with 8 mm diameter for terminal lugs M8
Operating current at +20°C:
170 A
Operating temperature:
–55 to +125 °C
Test voltage (contact to contact):
500 V
rms
Test voltage (contact to ground):
2500 V
rms
Contact resistance:
0.06 mΩ
Dimensions (H x W x D):
118 x 35 x 85 mm
Performance according to:
IEC 60603-2 / DIN 41612
F24H7 Female Connector
Number of contacts:
24 / 7
Contacts:
solder pins / fastons
Operating current at +20°C:
6 / 15 A
Operating temperature:
– 55 to +125 °C
Test voltage (contact to contact):
1550 / 3100 Vrms
Test voltage (contact to ground):
2500 / 3100 Vrms
Contact resistance:
15 / 8 mΩ
Performance according to:
IEC 60603-2 / DIN 41612
F48 Female Connector
Number of contacts:
48
Contacts: solder
pins
Operating current at +20 °C:
6 A
Operating temperature:
– 55 to +125 °C
Test voltage (contact to contact):
1550 V
rms
Test voltage (contact to ground):
2500 V
rms
Contact resistance:
15 mΩ
Performance according to:
IEC 60603-2 / DIN 41612
Connectors
AIR FLOW
AIR FLOW
AIR FLOW
Input fuse
An input fuse, internal or external, should be selected with a slow burn characteristic.
Sense leads
- The distance between the load connection and the module / system may result in a
voltage drop between the output and the load connection. To compensate for a limited
value of such a voltage drop, sense leads can be connected to the load under regard
of polarity. The sense leads determine the point to which the voltage regulates. As the
sense leads carry very low current, they are susceptible to noise pick up. Therefore, it is
recommended that they are intertwined and if necessary shielded.
- When the remote sense facility is not used, sense links must be made at the output
terminals. If the sense links are left open, the output voltage may rise causing the OVP
circuit to be activated.
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+
-S +S
LOAD
+
-
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+
-S +S
LOAD
+
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Installation