Optidrive HVAC User Guide V2.00
4.5. Motor Terminal Box Connections
Most general purpose motors are wound for operation on dual voltage supplies. This is indicated on the nameplate of the motor
This operational voltage is normally selected when installing the motor by selecting either STAR or DELTA connection. STAR always gives the
higher of the two voltage ratings.
4.6. Motor Thermal overload Protection.
4.6.1. Internal Thermal overload protection.
The drive has an in-built motor thermal overload function; this is in the form of an “I.t-trP” trip after delivering >100% of the value set in P1-
08 for a sustained period of time (e.g. 110% for 60 seconds).
4.6.2. Motor Thermistor Connection
Where a motor thermistor is to be used, it should be connected as follows :-
Additional Information
Compatible Thermistor : PTC Type, 2.5kΩ trip level
Use a setting of P1-13 that have Input 5 function as External Trip, e.g.
P1-13 = 6. Refer to section 8.1 for further details.
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