Mains Voltage Phase Rotation - Woodward easYgen-2000 Series User Manual

4.4.2.11

Mains Voltage Phase Rotation

General notes
37535B
Configure Monitoring > Mains > Mains Voltage Phase Rotat...
NOTICE!
Damage to the control unit and/or generation
equipment
– Please ensure during installation that all voltages
applied to this unit are wired correctly to both sides
of the circuit breaker.
Failure to do so may result in damage to the control
unit and/or generation equipment due to closing the
breaker asynchronous or with mismatched phase rota‐
tions and phase rotation monitoring enabled at all con‐
nected components (engine, generator, breakers,
cable, busbars, etc.).
This function will block a connection of systems with
mismatched phases only under the following condi‐
tions:
– The voltages being measured are wired correctly
with respect to the phase rotation at the measuring
points (i.e. the voltage transformer in front and
behind the circuit breaker)
– The measuring voltages are wired without angular
phase shift or interruption from the measuring point
to the control unit
– The measuring voltages are wired to the correct
terminals of the control unit (i.e. L1 of the gener‐
ator is connected with the terminal of the control
unit which is intended for the L1 of the generator)
– The LogicsManager function "Enable MCB" (refer
to parameter
incorrect rotation field
Correct phase rotation of the phase voltages ensures that damage
will not occur during a breaker closure to either the mains or the
generator. The voltage phase rotation alarm checks the phase
rotation of the voltages and the configured phase rotation to ensure
they are identical.
The directions of rotation are differentiated as "clockwise" and
"counter clockwise". With a clockwise field the direction of rotation
is "L1-L2-L3"; with a counter clockwise field the direction of rotation
is "L1-L3-L2".
If the control is configured for a clockwise rotation and the voltages
into the unit are calculated as counterclockwise the alarm will be
initiated. The direction of configured rotation being monitored by
the control unit is displayed on the screen.
If this protective function is triggered, the display indi‐
cates "Mns.ph.rot. mismatch" and the logical command
variable "07.05" will be enabled.
easYgen-2200/2500 | Genset Control
12923 Ä p. 206) is false in case of a
Configuration
155