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Specifications 27
3.11.3 Electrical Specifications
Refer to the individual component’s specifications.
Electromagnetic compliance (EMC)
The equipment contained in the power system complies with the specifications of FCC, Part 15,
Subpart B for class A equipment, CSA 108.8 for class A and CISPR 22 for class A.
Electrostatic discharge (ESD) immunity
No equipment damage or malfunctions shall occur when electrostatic discharge voltages of sever-
ity level 2 and 4, as specified by IEC-801-2, are applied to exposed parts of the power system.
3.11.4 Environmental Specifications
Operating
Transportation
During transportation the equipment may be subjected to the following conditions without damage:
Storage
Heat dissipation
A Helios DC System 4000/48 rectifier cabinet equipped with six Helios Rectifier 200I/48 or 200E/
48 will dissipate a maximum of 8,010 watts or 27,350 Btu/hr.
3.11.5 Floor and Point Loading
The floor loading is based on a footprint of 600 mm x 600 mm (23.6 in. x 23.6 in.) plus a 30-inch
aisle width (15 inches front and rear).
The point loading is based on distributing the cabinet weight over four shims, each with an
assumed area of 25.8 cm
2
(4 in.
2
).
See
Figure 1
for a typical system configuration for floor and point loading calculations.
Temperature:
0° to +50°C (32° to 122°F)
Humidity:
0 to 95% non-condensing
Altitude:
Sea level to 2134 m (7000 ft)
NOTE
Do NOT ship with the rectifiers installed in the rectifier cabinet(s).
Temperature:
-50° to +75°C (-58° to +167°F)
Humidity:
0 to 95% (non condensing) 4kPa max. WVP for 10 days
Vibration:
TR-NWT-000063 section 5.4.4 Transportation Vibration (packaged equipment)
Shock:
TR-NWT-000063, Section 5.4.1 Handling Drop Tests, and Section 5.4.3 Installation Shop Tests
Temperature:
-50° to +75°C (-58° to +167°F)
Humidity:
0 to 95% (non condensing) 4kPa max. WVP for 10 days
Table 31 Floor and point loading
Cabinet type Floor loading Point loading
Control and distribution cabinet 41.3 kN/sq m (90.9 lb/sq ft) 34.5 N/sq cm (50 lb/sq in.)
Auxiliary distribution cabinet 32.3 kN/sq m (71 lb/sq ft) 26.9 N/sq cm (39 lb/sq in.)
Rectifier cabinet 50.1 kN/sq m (110.2 lb/sq ft) 41.8 N/sq cm (60.6 lb/sq in.)