The picture above is not strictly relevant to the Wairoa Generation Scheme, but it does illustrate communications. I worked as a telecommunications engineer with the New Zealand Department of Civil Aviation before joining the Tauranga Electric Power Board in 1972.
The layout of the panel is expained in sections in the left hand side of this web page and below.
The above alarms are:
Supervisory Fail; Radio Power Abnormal; 110V Battery Low; Protection DC Fail; Air Pressure Low; Water Level Abnormal; Feeder Earth Fault; Supervisory Power Abnormal; Radio Fail; 400V Fail; Auxillary DC Fail; Sump Water Level High; Cooling Water Filter Blocked; Cooling Water Tank Level Low; Feeder Over Load.
