Siemens MJ-XL User Manual

6 MJ-XL Control Panel Automatic Mode
46 Siemens Power Transmission & Distribution, Inc.
BI-DIR (Bi-directional mode)
This mode of operation is intended for use on systems
where reverse power flow is anticipated and voltage regu-
lation is desired under either forward or reverse power
flow conditions.
In this mode, the tap changer operates when current mag-
nitude exceeds the I Threshold % setpoint. The tap
changer operates in forward mode when forward current
magnitude exceeds the I Threshold % setpoint, and in
reverse mode when reverse current magnitude exceeds
the I Threshold % setpoint.
If the I Threshold % setpoint is set to zero, the regulator
operates as above, using the 1% operational limits in
place of the I Threshold % setpoints.
View Pwr Flow: Bi-dir on the <CONFIGURE> Menu.
Figure 6.4 Bi-directional Mode
IDLE R (Idle Reverse)
This mode of operation is intended for use on systems
where reverse power flow is an abnormal situation. Under
reverse power flow conditions, the regulator idles at the
last tap position.
In this mode, the controller always operates in forward
mode. When forward current magnitude drops below the
I Threshold % setpoint, tap changes are inhibited and the
regulator idles at the last tap position. Tap changer opera-
tion resumes when forward current magnitude exceeds
the I Threshold % setpoint.
If the I Threshold % setpoint is set to zero, the regulator
operates as above, using the 1% operational limits in
place of the I Threshold % setpoints.
Select Pwr Flow: IDLE R on the <CONFIGURE> Menu.
Figure 6.5 Idle Reverse Mode
01% 1%Threshold % Threshold %
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Reverse
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Forward
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Tap Changes Inhibited
Band indicators flashing
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RPF indicator on RPF indicator off
01% 1% Threshold %
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Forward
Operation
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Tap Changes Inhibited
Band indicators flashing
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RPF indicator on RPF indicator off

Siemens MJ-XL Specifications

General

Brand	Siemens
Model	MJ-XL
Category	Control Panel
Language	English