Apologies for the poor picture quality, my camera phone is crap.
This is a Crabtree three phase board from the late 60's/early 70's. As you can see from the pics, a fun board to work on.
A close up of the three-phase arrangement. The earth terminals are tucked right into the corners, which makes them difficult to reach as the "Circuit Breakers" terminals are exposed.
The board runs an office block with a data centre, so we couldn't isolate it, it was due to be replaced with a spangly new Merlin Gerin board, but they've decided to postpone it due to the economic downturn. This happens to be a multi-million pound company. X(
This is a Crabtree three phase board from the late 60's/early 70's. As you can see from the pics, a fun board to work on.
A close up of the three-phase arrangement. The earth terminals are tucked right into the corners, which makes them difficult to reach as the "Circuit Breakers" terminals are exposed.
The board runs an office block with a data centre, so we couldn't isolate it, it was due to be replaced with a spangly new Merlin Gerin board, but they've decided to postpone it due to the economic downturn. This happens to be a multi-million pound company. X(