Huawei USG9500 Series Hardware Manual page 340

HUAWEI USG9500 Series
Hardware Guide
Item
If the PDF cannot provide 70 A circuit breakers and full configuration is unnecessary,
select the circuit breaker of each DC line using the following formula (A1,A2,B1,B2).
I = P / (Vin * D * 2)
I: rated current of the circuit breaker of each line on the PDF, in Ampere (A).
P: total power of each device.
Vin: input voltage of the power supply. (38 < Vin < 72)
D: derating coefficient. The recommended coefficient is 0.8.
2: number of the input lines of power module.
Table 2-16
Table 2-16 Cables for the PEMB
Distance from the PDF to
the Device
Shorter than or equal to 15
m
Longer than 15 m or shorter
than or equal to 25 m
Issue 03 (2017-12-15)
Specification
describes how to select power cables (a1,a2,b1,b2)
Power Cables a and b
Wire,450/750V,227 IEC
02(RV)16mm
Wire,450/750V,227 IEC
02(RV)16mm
Naked Crimping
Terminal,JG2,16mm
A,Tin Plated,for OEM
Naked Crimping
Terminal,OT,16mm
Plating,Naked Ring
Terminal
Wire,450/750V,227 IEC
02(RV)25mm
Wire,450/750V,227 IEC
02(RV)25mm
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Copyright © Huawei Technologies Co., Ltd.
Note
Each power module should
be equipped with one cable
2
,blue,85A
of this type. The cable
length is determined by an
onsite project survey.
Each power module should
be equipped with one cable
2
,black,85A
of this type. The cable
length is determined by an
onsite project survey.
Each cable should be
equipped with one terminal
2
,M6,95
of this type.
Each cable should be
2 equipped with one terminal
,M8,Tin
of this type.
Each power module should
be equipped with one cable
2
,blue,110A
of this type. The cable
length is determined by an
onsite project survey.
Each power module should
be equipped with one cable
2
,black,110A
of this type. The cable
length is determined by an
onsite project survey.
2 Hardware Installation
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