HUAWEI TECHNOLOGIES CO., LTD.

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Huawei Confidential

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23/4/9

Power Cutover Program for Hybrid Power Solution

BTS 3900A

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 2

1. Shut down the AC to the Rectifier on the BTS 3900A cabinet from the ACDB.

Cutover Program-implementation

2. Shut down the battery breaker of the rectifier, on the BTS 3900A Cabinet.

3. Shut down the ACDC breaker of the BTS 3900A Cabinet

Off the AC breaker from ACDB

Off the battery breaker

Off the ACDC breaker

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 3

Cutover Program-implementation

4. Remove the battery cable on the ACDC point prepare it

Remove the battery input cable 5. Remove the DC cable on the Load 1 and Load 2 point prepare it

Remove the load 1 and load 2 cable

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 4

Cutover Program-implementation contd.

New power systems

BTS3900A LOAD1

6. Connect it to one of the 2 pairs coming from the new power system, through a two input end connector.

LOAD 1 sketch map

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 5

Cutover Program-implementation contd.

6. Connect it to one of the 2 pairs coming from the new power system, through a two input end connector.

LOAD 1 Wiring diagram

New power systemsBTS3900A LOAD1

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 6

Cutover Program-implementation contd.

New power systemsBTS3900A LOAD 2

7. Connect it to the second pair of the 2 pairs coming from the new power system, through a two input end connector.

LOAD 2 sketch map

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 7

Cutover Program-implementation contd.

7. Do same for Load 2 cable.

New power systems

LOAD 2 Wiring diagram

BTS3900A LOAD1

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 8

Cutover Program-implementation contd.

7.“ON” the breaker for the new power system on the ACDB.

“ON” the breaker for the new power system on ACDB.

“ON”/close breaker for load on the new power system

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 9

Equipment check and power on goes thus ： Check the voltage at the ACDB point and confirm at the main input point of

the new power system, if ok switch on the main input breaker.

Switch on the breaker for the two battery cabinets

Check the DC output from the new power system, if ok close the breaker for

the two pair cables going to BTS3900A

Finally check the DC voltage at the DCDB end to confirm same as the

output DC at the New power system, if ok confirm the site(s) is/are up and

running through the FME switch.

Clean up the site and leave.

Cutover Program- Check and power on

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