MultiTrode MultiSmart Installation & Operation Manual page 128

Figure 129 – Motor Protection Settings for an Individual Pump.
17.1.1 Configuring CT Values
Current transformers (CTs) wired into the Energy Monitoring and Motor Protection board (3MP) are used to
monitor motor currents. In order for the correct currents to be calculated, the ratio the CTs must be entered.
The default configuration is for a 50:5A CT for each current input.
Name
CT Primary
CT Secondary
Full Load Current (Amps)
Table 19 – CT & FLC Parameters
17.1.2 Configuring Motor Protection Faults
Name
Amps Phase Imbalance
Amps Phase Rotation
Ground (Earth) Fault
Insulation Resistance
Insulation Resistance Warning
Over Current
2
Over Current I T
Pump Efficiency
Under Current
Table 20 – Motor Protection Faults
Page 128 of 201
MultiSmart Installation & Operation Manual
Description
Enter the CT Primary current in Amps.
Enter the CT Secondary current in Amps.
Note: 5A is the maximum CT Secondary current allowable.
Sets the Full Load Current of the pump motor. This setting must be correctly
entered by the user for the threshold values to correctly work.
Description
Detects a current imbalance between phases. The threshold value sets how
much imbalance is acceptable before a fault condition exists.
Detects if the phase rotation is incorrect.
Detects a fault to ground. The threshold value sets what amount of phase to
ground current is required to be considered a fault.
The energy monitoring and motor protection board has a built in insulation
tester. This parameter sets fault conditions. The threshold value sets the
insulation resistance level to raise a fault condition in Mohms. See Section 17.2
for more detail on configuring the insulation resistance tester itself.
This option if enabled will give a warning and will not fault the pumps by default.
However we can set this to fault the pump if required. The main use for this is to
generate a warning at the first threshold set for the test.
Detects an Over Current condition. The threshold value sets the level of over
current required before a fault condition exists.
Calculates the instantaneous I
goes above the threshold.
This functions as a fault. If the calculated efficiency is larger than a preset
amount, a Pump Efficiency fault is displayed.
Detects an Under Current condition. The threshold value sets the level of under
current required before a fault condition exists.
2
T and faults the pump if the calculated value
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