Page 71 - Electrician - TT (Volume 1)

ELECTRICIAN - CITS

Plates
Plates are of two types
1 Positive plates.
2 Negative plates.
Positive plates(P O )
2
B
Positive plates are of two types
1 Plante plate or formed plate.
2 Faure plate.
1 Plante plate
These are prepared by the process of repeated charging and discharging. They are made of lead at the beginning
which changes to lead peroxide after charge.
2 Faure plate
Pasted or Faure plates are made of rectangular lead grid in to which the active material i.e. Lead peroxide (P O )
b
2
is filled in the form of a paste. Colour of positive plate is dark chocolate brown.
Negative plates (P )
B
Negative plates are made of lead grid, and active material is spongy lead (P )which is in the form of a paste. The
b
ampere hour capacity of lead acid cell depends up on the size of plates, number of plates, active material used,
the strength of the electrolyte. The colour of negative plate is grey.
Plate connector

It is made of pure lead. All the positive and negative plates are assembled and welded separately with it forming
positive and negative groups.

Post terminal or pillar
A small post extended upward from each group of welded plates from the plate connector forms the post terminal

58

CITS : Power - Electrician & Wireman - Lesson 13-19