88
CET Electric Technology
The logic diagram of Voltage L Alarm is illustrated in Figure 4-16.
Figure 4-16 Voltage L Alarm Logic Diagram
4.3.6 Power and Power Factor Alarms
PMC-592 provides an internal
Power On/OFF
status as well as
two Power Alarm levels (High and Low)
.
The
Power H/L Alarms
will only be evaluated if it’s determined that the
Power ON
status is
TRUE
.
The
Power and Power Factor Alarms only apply to the Mains Inputs
.
It should be noted that the
Power Alarm On
and
Power Alarm Threshold
are calculated based on the
Nominal Voltage,
Breaker Rating
and
Current ON Threshold
parameters. Therefore, it’s critical to set
these parameters correctly for the
Power ON
and
Power Alarms
to work properly
.
a)
For Firmware V1.00.09 or earlier
Power Alarm
ON Limit = Channel Breaker Rating x Nominal Voltage x 3 x Current ON Threshold
Power H/L Alarm Limit = Channel Breaker Rating x Nominal Voltage x 3 x Power H/L Alarm Threshold
where Nominal Voltage = Nominal ULN Voltage (Modbus Register 6001)
b)
For Firmware V1.00.10 or later
Power Alarm ON Limit = Channel Breaker Rating x (Nominal Voltage ÷
√
3) x 3 x Current ON Threshold
Power H Alarm Limit = Channel Breaker Rating x (Nominal Voltage ÷
√
3) x 3 x Power H Alarm Threshold
Power L Alarm Limit = Channel Breaker Rating x (Nominal Voltage ÷
√
3) x 3 x Power L Alarm Threshold
where Nominal Voltage = Mains-I/II PT Secondary (ULL Voltage) (Modbus Registers 6043 and 6046)
Power OFF Limit = Power ON Limit x (1 – Universal Hysteresis)
Power H Alarm Return Limit = Power H Alarm Limit x (1 – Universal Hysteresis)
Power L Alarm Return Limit = Power L Alarm Limit x (1 + Universal Hysteresis)
Parameters
Description
Range/Option
Default Value
Power Alarm Enable
Bit 0 = Mains-I, Bit 1 = Mains-II
Bits 2 - 15 = Reserved
0 = Disabled
1 = Enabled
0
kW Total H Alarm Threshold (%)
kW Total H Alarm Threshold
0 to 100%
0
kW Total H Alarm Time Delay (s)
kW Total H Alarm Time Delay
0 to 9999 (s)
0
kW Total L Alarm Threshold (%)
kW Total L Alarm Threshold
0 to 100%
0
kW Total L Alarm Time Delay (s)
kW Total L Alarm Time Delay
0 to 9999 (s)
0
kvar Total H Alarm Threshold (%)
kvar Total H Alarm Threshold
0 to 100%
0
kvar Total H Alarm Time Delay (s)
kvar Total H Alarm Time Delay
0 to 9999 (s)
0
kvar Total L Alarm Threshold (%)
kvar Total L Alarm Threshold
0 to 100%
0
kvar Total L Alarm Time Delay (s)
kvar Total L Alarm Time Delay
0 to 9999 (s)
0
kVA Total H Alarm Threshold (%)
kVA Total H Alarm Threshold
0 to 100%
0
kVA Total H Alarm Time Delay (s)
kVA Total H Alarm Time Delay
0 to 9999 (s)
0
kVA Total L Alarm Threshold (%)
kVA Total L Alarm Threshold
0 to 100%
0
kVA Total L Alarm Time Delay (s)
kVA Total L Alarm Time Delay
0 to 9999 (s)
0
PF Total Alarm Enable
Bit 0 = Mains-I, Bit 1 = Mains-II
Bits 2 - 15 = Reserved
0 = Disabled
1 = Enabled
0
PF Total H Alarm Threshold (%)
PF Total H Alarm Threshold
0 to 100%
0
PF Total H Alarm Time Delay (s)
PF Total H Alarm Time Delay
0 to 9999 (s)
0
PF Total L Alarm Threshold (%)
PF Total L Alarm Threshold
0 to 100%
0
PF Total L Alarm Time Delay (s)
PF Total L Alarm Time Delay
0 to 9999 (s)
0