Service Manual
4-183
Installation
Recommendations concerning the Power Supply and Protection of the System
Protective ground connection
Example of a power supply configuration for the HiPath1150/1190/1190R systems
Figure 4-44 Diagram of power supply configuration for the HiPath1150/1190/1190R
Systems
4.14.1 Protection of external lines and extensions
The primary protection of external lines and extensions must be provided by grounding the
system through a separate cable (minimum section = 2.5 mm
2
) set up exclusively for the
protection of the telephone system. The secondary protection of external lines and extensions
is between wires A and B.
For primary protection for a distribution box that is external to the PABX use a MPT250 shield
with two PTCs (A and B wires) for overcurrent protection along with a gas capsule connected
to the ground wire through a separate cable that is independent of the cable used for grounding
the power supply.
Danger
The HiPath1150/1190/1190R power supplies must be protected by an earth ground
in a separate safety ground conductor (PE - green/yellow) (TN-S system, minimum
section = 2.5 mm
2
) as shown in figure 4-44.
Any additional servicing of low voltage networks (100 - 240 V AC) must be done by
qualified technical personnel only.
Do not use as a grounding point:
- Central heating systems
- Sewer systems
- Ground wire for aerial systems.
Failure to comply with these recommendations may lead to hazardous conditions.
!
L1 N PE
127 Vac
HiPath1150/1190/1190R
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