Siemens MJ-4A Installation And Operation Manual page 54

6
MJ-4A & MJ-4B Control Panel Automatic Mode
6.5.4 Power Flow Modes
The MJ-4 supports six Power Flow Modes: Forward
Locked, Reverse Locked, Bidirectional, Neutral Reverse,
Tap Changer Direction
Table 6.3
Compensation
Power Flow Mode
Bi-Dir
Neut R
Idle R
Co-Gen
R (See Table 6.4)
F Lock
R Lock
* If tap position is not known, Neut R operates same as Idle R.
Tap Change Control Operation
Table 6.4
"Vcomp" location
Out of Band High
Out of Band Low
Voltage Setpoint
Bandwidth Setpoint
Time Delay Setpoint
Line Drop Compensation
(R = Resistance, X = Reactance)
*For Co-gen mode when in Reverse Power Flow mode,
use Forward Voltage, BW, and Time Delay setpoints, but
use Reverse Line Drop Compensation values.
50
Line Drop
Power Flow Direction
Values Forward
•
F
R
•
F
•
F
•
F
•
F
F
•
R
R
Forward
"L " Bushing
Lower
Raise
Fwd Volts
Fwd BW
Fwd Delay
F*
Fwd Comp (R)
Fwd Comp(X)
Idle Reverse, and Co-generation. Your selection of one of
these determines which algorithm the control program
uses under reverse power flow conditions.
MJ-4 Internal Operation
Reverse Forward
•
•
•
•
•
•
•
• •
•
• •
•
Reverse
"S" Bushing
Raise
Lower
Rev Volts
Rev BW
Rev Delay
R*
Rev Comp (R)
Rev Comp (X)
Tap Change Control
Reverse See Table 6.4
Forward
•
Reverse
Forward
•
Return to Neutral*
Forward
•
None (tap idles)
Forward
Forward
Forward
Forward
•
Reverse
•
Reverse
Siemens Energy, Inc.