Sagem 4450E - Manual (Page 51)

SAGEM 3P@C
3P@C Installation Manual
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The basic requirement of grounding is that the grounding
resistance should be little. During the engineering design, low-
resistance grounding materials should be applied with sufficient
length, width and thickness to ensure that 3P@C 4450E meets
the grounding requirements. Ground piles can be buried deeply
under the ground to form a flat surface there, so as to ensure low
resistance for various frequencies. As the type of soil impacts the
grounding resistance most, chemical agents (resistance-reducing
agents) can be applied around the ground pile to reduce
resistance for areas where the soil conditions are poor.
Furthermore, the temperature and humidity of soil also have
impact on the grounding resistance and this should also be
considered during the engineering design.
3.1.7. 3.1.7. 3.1.7. 3.1.7. Anti-interference Requirements
Any interfering sources from the equipment or outside the applied system may affect the equipment
in the capacitance coupling, inductance coupling, electromagnetic wave radiation, common
resistance (including the grounding system) and the conduction mode of conducting wire (power
supply line, signaling line and output wire). For this reason, note that:
„ Take effective power anti-interference measures for the power supply system.
„
Do not combine the working ground of 3P@C 4450E with the grounding device
or the lightning grounding device of the power equipment but keep the distance
between them as far as possible.
„ Keep far away from any large-power radio transmitting station, radar transmitting
station and high frequency strong current equipment.
„ Take electromagnetic shielding measures when necessary.
3.1.8. 3.1.8. 3.1.8. 3.1.8. Other Requirements
„ The indoor should be bright enough for operation, preferably 500 ~ 750
lumen/m
2 .
„ The equipment room should be attended by designated persons or have other
burglar-proof measures.
„ The water supply and draining systems of the equipment room should be
designed in accordance with the normal water consumption and fire fighting
regulations, and sufficient fire protection devices should be equipped.