Owner's Manual

Owner’s Manual for Power Zone Connectivity Server 21
Installation and Operation
Auto Mains Failure (AMF)
See Figure 3-42. Auto Mains Failure (AMF) provides a
way to control a non-intelligent transfer switch from the
Power Zone Pro Main Controller. When AMF is enabled,
the Controller monitors utility voltage and frequency,
controls starting and stopping of the generator, and
controls switching of the load from utility to generator and
back again as needed. See Table 1 for a description of
each parameter.
To set the configuration:
1. Enter a value for each of the AMF settings.
2. Enable AMF by clicking the “Enable” check box.
3. Select “Apply Changes”.
The manual control buttons can be used to manually
switch the load between the utility and the generator.
NOTE: The manual switching will only work if the power
source meets the defined quality ranges. The load
cannot be connected to both the utility and the generator
a the same time.
Figure 3-42. Auto Mains Failure
A Utility Switch Open/Close
B Generator Switch Open/Close
C Generator Start/Stop
009632
A
B
C
Table 1 - AMF Parameters
Setting Range and Units Description
Enable Enabled or
disabled
Enables or disables the use of AMF.
Utility Voltage
Upper Limit
Volts, 103% -
130% of target
voltage
Highest allowed utility voltage.
Utility Voltage
Lower Limit
Volts, 50% - 97%
of target voltage
Lowest allowed utility voltage.
Utility
Frequency
Upper Limit
Hz, 103% - 120%
of target
frequency
Highest allowed utility frequency.
Utility
Frequency
Lower Limit
Hz, 80% - 97% of
target frequency
Lowest allowed utility frequency.
Return to Utility
Delay
Seconds, 0 - 1800 The amount of time to delay switching the load back to utility once utility has
been restored to be within the voltage and frequency ranges above. If
voltage or frequency of the generator is outside of the acceptable range, the
load will immediately switch back to utility.
Line Interrupt
Delay
Seconds, 0 - 60 The amount of time the utility can be outside of the ranges above before the
generator is started. If the generator is already running, the load will be
switched immediately without line interrupt delay.
Time Delay
Neutral
Seconds, 0 - 60 If the switch has a neutral position where the load is not connected to either
generator or utility, this is the time the switch stays in the neutral position
when transitioning the load between utility and generator.