Voltage Imbalance Protection
The purpose of this feature is to protect the compressor against a voltage imbalance
that could lead to motor overheating.
A configurable setting (default = 5 %) for voltage imbalance is used to determine the
operating limit of the compressor. The voltage imbalance setting is configurable in
the range of 2 to 8 % using the Next Gen CoreSense module app.
Alarm conditions:
•
Warning: when the voltage imbalance > 3 % (configurable).
•
Trip: when the voltage imbalance > 5 % (configurable).
•
Reset: automatic reset after 5 min; voltage imbalance < 5 %.
6.10 Part-winding Protection
The two winding supply cables should go through the current sensor in the same direc-
tion. At first start or at power reset of the Next Gen CoreSense module, the voltage is
measured on both windings.
If the voltages are identical:
a.
Compressor is connected in full winding, the protection is disabled.
b.
If the voltages are different, the voltages are compared again after 1 second.
c.
If the voltage on the second winding is the same as on the first winding, the comp
ressor is connected in part-winding - the protection is enabled.
d.
If the voltage on the second winding is not the same as on the first winding, the
second winding is improperly connected and the compressor trips.
The user has the possibility to select between a warning or trip condition. After a trip, the
compressor will restart after 2 minutes. Default setting is trip.
6.11 LEDs on the terminal box cover
Status LEDs in 3 colours (green, orange and red) are visible on the top of the T-box
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