NewNew Products
ProductsConnector for High Voltage Direct Current Distribution System

1.

INTRODUCTION

In these days the electric consumption of Information andCommunication Technology (ICT) instruments for servers
and routers increases rapidly due to highly developed
operating network environments of Internet.
Data centers which install and operate ICT instruments
for the servers and routers tend to increase year by year,
therefore the construction of Green-Power Supply
Systems is presently becoming an important subject.
FURUKAWA POWER COMPONENTS INC. (FPCI) has
developed new connectors and started in implementing
in cooperation with NTT FACILITIES, INC., which fit to theHigh Voltage Direct Current (HVDC) Distribution System
expected for next generation systems as shown in Figure
1.
The developed connector is introduced as below.
AC Power Distribution System

DC Power Distribution SystemＵＰＳ

ICT System

DC 48 V Power System

ACAC DCDC

supply voltages, its electrical shocks and its short circuit
accidents have very serious impacts on human bodies
and the neighboring environment.
In general the cable connector parts of power devices
are exposed because of its crimping terminals as shownin Figure 2.
A new developed connector is applied for a connector
connection method having no conducting exposure parts
as shown in Figure 3 and there have no short circuit risksof accident due to polarity errors during power line connection works.

ICT System

ＤＣ４８ＶACAC

DC DCACCPUACDC

DC DC CPUAC
Battery

Battery

Compared with AC Power Distribution System

Compared with DC 48 V Power Distribution System●

Improvement of system performance●Lower cost of facilities●Higher reliability●

Improvement of installment design freedom

Figure 2Connection of crimping terminal.

HVDC Distribution System
ＨＶＤＣ

ICT SystemApprox. DC 400 VDCAC DCDCCPU

AC
Applied to connection

BatteryPanel mount typeFigure 1

2.

Outline of high voltage direct
current distribution system.

BACKGROUND OF DEVELOPMENTA HVDC Distribution System needs a full consideration of
the safety its design compared to a DC 48 V system foravailable communication buildings, because its higher

Figure 3

Connection of connector.

Furukawa Review, No. 41

2012

17

Connector for High Voltage Direct Current Distribution System

3.

CHARACTERISTICS OF CONNECTOR

The connector is shown in Figure 4 and its characteristics
are as below.
(1) Safety design
A resin material is selected as the material for theconnector covers in consideration of the applied
voltages, the heat-resistance and the anti-burning
properties etc., and a non-exposure construction of
the conducting parts is applied with respect of safety after the connector connection work is completed.
And also before the connector connection operates,
under consideration of safety, the resin caps are puton the conductor heads of pin plugs, receptacles
and socket plugs in order to prevent electricalshocks. (Figure 5, Figure 6)(2) Conductor connection construction
As a band-contact type plug-in construction isadopted in order to easily move on & off, the maintenance and operational handling of the connector are
remarkably reduced compared with an existing type.
(3) A wrong insertion prevention mechanism
In order to prevent to insert polarity errors, roughshapes in key grooves of its cover bodies aredesigned and 4 types of different shapes areapplied as shown in Figure 5 and Figure 6.
【Joint patent pending with NTT FACILITIES, INC.】

Key position variance (Receptacle・Socket plug side) ■Receptacle
Key No.1
Key No.2(Panel mount type)Key groove

Key No.3

Socket cap■Socket plug
(In line type)Key groove

Socket cap

Figure 64

Figure 4

In line type

Connector for high voltage direct current
distribution system.

Key position variance (Pin plug side) ■Pin plug
Key No.1
Key No.2(Common to Panel mount type and In line type)

Key protrusion

Key No.3

Key No.4
Cover nut

Receptacle/socket plug and key
groove patterns.

APPLICATION RANGE

Application range of a new developed connector isshown in Table 1.
Table 15.
Panel mount type

Key No.4

Application range.

Rated voltage

DC/AC 400 VMax. current

545 A (not including peak current)

Applied cable

CF･CV･EM-LMFC etc.

Applied cable size

200 mm2

CONCLUSION

The newly developed connectors are expected for not
only the HVDC Distribution System of data centers andcommunication buildings, but also for the new energy
sources such as photovoltaic power generations, wind
power generations and other fields like smart grids etc.
From now on, products lineup will increase including
2
those for the application of 325 mm of cable size in order
to meet customers’ needs.
For more information, please contact:
Production Division Engineering Dept. Group 2
FURUKAWA POWER COMPONENTS INC. (FPCI)TEL: +81-46-869-3482 FAX: +81-46-869-3493

Pin cap*Common to Panel mount type and In line typeFigure 5

Pin plug and key protrusion patterns.

Furukawa Review, No. 41

201218