12.OCT 2007

HUAWEI TECHNOLOGIES Co., Ltd.

www.huawei.com

HUAWEI Confidential

Security Level: Internal Open

Rectifier PowerSystem

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 2

1 Brief Introduction of Power SystemRectifier (AC/DC Power supply) such as Delta2000w &Delta1200w,Emerson1800w and 2000w isbelow.

Delta2000wDelta2900wR48-1800A R48-2800E

Delta 2900 Emerson 2000E Eltek 1500

Eltek 1500

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 3

(3)LLVD: Load Low VoltageDisconnection. Once the AC input faildown, the battery discharging and thevoltage come down to the LLVDvoltage such as 44V, then the loadconnected to the LLVD contactor willbe disconnected to protect the BLVDload.

(4)BLVD: Battery Low VoltageDisconnection. Once the AC inputbroken down and LLVD contactor isdisconnected, the battery voltage stillgoes down to the BLVD voltage suchas 43.2V,then the load connected tothe BLVD contactor will bedisconnected to protected the battery.

Notice: Load connected to BLVD isnot battery, but the important loadsuch as transport or optical telecomequipment. Generally the power ofBLVD load is smaller than the powerof LLVD load.

2 Maintenance of Power System

PS48300/1800-X6 Power system LLVD and BLVD diagram

The parts in the red dashed frame is the parts in power system.

AC/DCRectifier

ACInput

32A 32A 10A 10A 100A 100A100A

FuseMCB

LLVD

Contactor

BLVD

Contactor

Battery1

Battery2

+ bus bar

-bus bar

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 4

3 Emerson 2000E Rectifier System

PS48300/1800-X6 Power system LLVD and BLVD diagram

The parts in the red dashed frame is the parts in power system.

PL to PL breakers are for Priority load and NPL for non priority loads and alarm card as well

PL Load breakers (priorityload)

NPL Load breakers (nonpriority load)

Rectifier Alarm Card

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 5

4 Delta 2000 Rectifier SystemPL to PL breakers are for Priority load and NPL for non priority loads and alarm card as well

PL Load breakers (priorityload)

NPL Load breakers (nonpriority load)

Rectifier Alarm Card

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 6

5 Delta 1200 Rectifier SystemPL to PL breakers are for Priority load and NPL for non priority loads and alarm card as well

PL Load breakers (priorityload)

NPL Load breakers (nonpriority load)

Rectifier Alarm Card

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 7

6 Delta 2900 Rectifier SystemPL to PL breakers are for Priority load and NPL for non priority loads and alarm card as well

PL Load breakers (priorityload)

NPL Load breakers (nonpriority load)

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 8

7 Delta 2900 Rectifier SystemDelta 2900 and Delta 2400 rectifier system Alarm output card is showing below

Output alarm card

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 9

7 Delta 1200 ,2000 and Ascom3000 Rectifier Systemoutput alarm card

Delta 2000 and Delta 1200 rectifier system Alarm output card is showing below

Output alarm card

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 10

3Maintenance of Power System

Cable of Power system of three phase AC input

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 11

3Maintenance of Power System

Cable of Power system of three phase AC input

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 12

3Maintenance of Power System

Cable of Power system of three phase AC input

12.OCT 2007

HUAWEI TECHNOLOGIES Co., Ltd.

www.huawei.com

HUAWEI Confidential

Security Level: Internal Open

Thank You

www.huawei.com

Slide1721 Brief Introduction of Power SystemSlide161Slide171Slide173Slide174Slide175Slide176Slide1773Maintenance of Power System3Maintenance of Power System3Maintenance of Power SystemSlide8