Optidrive HVAC User Guide V2.00
11.4. Additional Information for UL Approved Installations
Optidrive HVAC is designed to meet the UL requirements. In order to ensure full compliance, the following must be fully observed.
Input Power Supply Requirements
200 – 240 RMS Volts for 230 Volt rated units, + /- 10% variation allowed. 240 Volt RMS Maximum
380 – 480 Volts for 400 Volt rated units, + / - 10% variation allowed, Maximum 500 Volts RMS
480 – 525 - NOT UL APPROVED
500 – 600 Volts for 600 Volt rated units, + / - 10% variation allowed, Maximum 600 Volt RMS
Maximum 3% voltage variation between phase – phase voltages allowed
All Optidrive HVAC units have phase imbalance monitoring. A phase imbalance of > 3% will result in the drive
tripping. For input supplies which have supply imbalance greater than 3% (typically the Indian sub- continent &
parts of Asia Pacific including China) Invertek Drives recommends the installation of input line reactors.
Alternatively, the drives can be operated as a single phase supply drive with 50% derating.
50 – 60Hz + / - 5% Variation
All the models are suitable for use on a circuit capable of delivering not more than 100kA rms (AC) symetircal
short-circuit current with the specified maximum supply voltage.
Incoming power supply connection must be according to section 4.3
All Optidrive HVAC units are intended for indoor installation within controlled environments which meet the condition limits in section 13.1
Branch circuit protection must be installed according to the relevant national codes. Fuse ratings and types are shown in section 13.4
Suitable Power and motor cables should be selected according to the data shown in section 13.4
Power cable connections and tightening torques are shown in section 3
Optidrive HVAC provides motor overload protection in accordance with the National Electrical Code (US).
Where a motor thermistor is not fitted, or not utilised, Thermal Overload Memory Retention must be enabled by setting P4-12 = 1
Where a motor thermistor is fitted and connected to the drive, connection must be carried out according to the information
shown in section 4.6
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