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CET Inc.
It should be noted that the
absolute value
of the
Voltage ON/OFF Threshold
is calculated based on the
Nominal Voltage
parameter.
Therefore, it’s critical to set the Nominal Voltage correctly for the
Voltage ON/OFF to work properly.
Voltage Alarm ON Limit = Nominal Voltage x 5.0%
Voltage Alarm OFF Limit = Voltage ON Limit x (1 – Universal Hysteresis)
The following figures illustrate the logic diagram of the Voltage Alarm ON/OFF status, respectively.
Figure 4-5 Voltage ON Logic Diagram
Figure 4-6 Voltage OFF Logic Diagram
The following table illustrates the Voltage Alarm parameters.
Parameters
Description
Range/Default
Voltage H Alarm Limit
Voltage H Alarm Limit
0*
1
to 300V
Voltage H Alarm Time Delay
Voltage H Alarm Time Delay
0* to 9999(s)
Voltage L Alarm Limit
VLN H Alarm Limit
0* to 300V
Voltage L Alarm Time Delay
VLN H Alarm Time Delay
0* to 9999(s)
Voltage Alarm Trigger
VLN Alarm Trigger
0*
2
= Disabled
Bit 0 = RO
Bit 1= Alarm Indicator
Bits 2-15=Reserved
Table 4-7 Voltage Alarm Parameters
Notes:
1)
0 means this Alarm Channel is disabled.
2)
0 means the Alarm Trigger is disabled.
The logic diagram of Voltage H Alarm is illustrated in Figure 4-7.
Figure 4-7 Voltage H Alarm Logic Diagram
The logic diagram of Voltage L Alarm is illustrated in Figure 4-8.
Figure 4-8 Voltage L Alarm Logic Diagram