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G8MNY > TECH 06.01.08 15:30l 37 Lines 1308 Bytes #999 (0) @ WW
BID : 42006_GB7CIP
Read: GUEST OE7FMI
Subj: Re:- A ton of batteries
Path: DB0FHN<DB0MRW<DB0ERF<DB0FBB<DB0IUZ<DB0GOS<ON0AR<HS1LMV<CX2SA<GB7CIP
Sent: 080106/1414Z @:GB7CIP.#32.GBR.EU #:42006 [Caterham] $:42006_GB7CIP
From: G8MNY@GB7CIP.#32.GBR.EU
To : TECH@WW
When I was an telephone apprentice in the 60's I had to work on the Croydon
Telephone exchange battery.
These were some of the biggest in the UK weighing in at 1 ton per cell! There
was no generator on site as it was next to Croydon's main water well & any
diesel spillage could be dangerous. So the batteries had to do at last 24hrs at
a peak load of 1100 Amps for the 4 busy 10,000 line exchanges, so the total
battery capacity was about 10,000 AH (5000 per bat)
The 2x 25 cell 50V battery set (25 was unusual for 50V) that came to 100 tons
plus 2x 1000 Amp charging kit & was on the ground floor for obvious reason.
< ---- 1m ---- > ASCII DIAGRAM!
Acid __Cell Plates__ Lead
Level-³±±ÝºÅºÅºÅºÅºÞ±±³^ lined
Woodenٱݺ³º³º³º³ºÞ± | cell case
sides -±Ýº³º³º³º³ºÞ± |
±Ýº³º³º³º³ºÞ± |
±Ýº³º³º³º³ºÞ± 1.5m
±Ýº³º³º³º³ºÞ± |
±Ýº³º³º³º³ºÞ± |
±ÛÜÜÜÜÜÜÜÜÜÛ± |
±±±±±±±±±±±±± v
± PLINTH ±
Each cell was 1m x 1m & 1.5m tall, open construction type, made from wood outer
shell lined with lead. My job for 1 day was top up all the cells (50 gal/cell?)
with tap water from a hose, (as Croydon's hard tap water was OK for this).
Why Don't U send an interesting bul?
73 De John, G8MNY @ GB7CIP
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