Energy Tech Laboratories EDP70 - Manual (Page 27)

MI00/10056 rev.1--05/2001-- page 27
CAUTION!
WARNING!
All power connection must carried out by qualified
licensed personnel experienced
in wiring this type of equipment
The safety ground wire must
be connected before the power input cables
The correct phase rotation
(phase A leads B leads C)
must be observed on the UPS terminals.
An input grounded neutral conductor is required
(24/36kVA only)
In maintenance by-pass operation,
the UPS components are de-energized,
with the exception of input/output terminals,
battery cabinet, input matching voltage
transformer (for 480/208 configuration) and isolating
transformer (for 50 and 80kVA).
All input power (AC and DC) must be disconnected to ensure
complete isolation