Remplacement des cellules malades dans la phase IV. 5 projet-reg

parti ppris des choses

BHARAT SANCHAR NIGAM LIMITED

(A Government of India Enterprises)

O/o DGM (MS-O), CMTS

Fourth Floor, Main Telephone Exchange, BSNL, Pondicherry – 605001.

________________________________________________________________________

No: DGM MS-O/Office Corres/PY/2009-10 /8 dated at PY the 23-06-09

To,

Mr.Senthil Kannan Manager (O&M),

Nortel Networks,

Ellis Nagar,

Madurai-16.

Sub: Replacement of sick cells in Phase IV.5 Project-Reg.

It is to bring to your kind notice that the following Number of sick Battery cells supplied in Phase IV.5 project are to be replaced by Nortel Networks.

Sl No SSA NAME NO OF SICK CELLS REPORTED NO OF SICK CELLS REPLACED REMARKS

200 AH 400AH

1. DHARMAPURI 193 66 -

2. VELLORE 20 - 6

3. CUDALLORE 6 - -

4. COIMBATORE I 48 - -

5. COIMBATORE II 19 - 6

6. PONDICHERRY - - -

TOTAL 286 66 12

Many battery cells are reported to be weak even before completion of A/T because of the problem in the working of the embedded power plant available in the USO BTS.

1.Power plant is not having in built cutt-off voltage for isolating the Battery terminal from load at 44V, the battery is draining up to 38V leading to failure of many cells at a time .

2. As the working range of rectifier is 200 to 240V +/- 10%,the Battery is draining very often as the available E/B voltage is nominally bellow 190V for most of time in Rural areas.

As the failure of Battery cells are observed due to technical problem of the embed power plant ,it is required that all these weak cells are to be reconditioned /replaced by Nortel, so as to complete offering of A/T and to Maintain BTS Network with minimum interruption.

Deputy General Manager (MS-O),

CMTS, Pondicherry.

Copy to

1. GM (MS-O), CMTS, Trichy.

2. GM (MS-O), CMTS, Coimbatore.

3. GM (MS-I), BSNL, Chennai.

4. GM (MS-D), BSNL, Chennai.

...