1. Frequency and Voltage Variable Function
   - Accepts 3-phase AC power at 50Hz or 60Hz and varies frequency from 0 to 400Hz
   - Supports 3-phase AC power and adjusts voltage up to the Up toimum AC voltage
   - Fully performs the fundamental functions of VVVF (Variable Voltage Variable Frequency)

2. Convenient User Operation
   - Simple operation using a 4-20mA command signal and dry contact for start/stop
   - Easy access via industrial-standard MODBUS-485 communication

3. HVAC System Compatibility
   - Optimized default settings for HVAC applications, enabling immediate use without additional configuration

4. High Power Efficiency
   - Achieves higher power efficiency compared to conventional constant-speed operation
   - Integrates with PMSM and ACIM compressors and fans in HVAC systems, including air conditioning units, chillers, and constant temperature/humidity machines
   - Supports variable system implementation with the INB series to achieve high SEER (Seasonal Energy Efficiency Ratio)

5. Enhanced Protection Features
   - Continuously monitors current, voltage, and temperature to safeguard the system
   - Ensures stable operation through multi-layer current and voltage protection
   - Provides predictive protective control, adjusting for environmental variations in current and temperature

6. Adaptive Protection Function
   - Includes adaptive protection mechanisms to maintain inverter functionality without system shutdown
   - Operates at optimal speeds to prevent shutdowns due to rising ambient temperatures
   - Detects performance fluctuations in compressors and fans to adjust speed accordingly

7. Optimized Sensorless Operation
   - Implements advanced sensorless control for stable low-speed operation
   - Accurately detects mechanical speed without requiring an encoder
   - Precisely controls fan and compressor speeds without the need for additional sensors

SPEC	INB33-SC	INB35-SC	INB37-SC	INB3B-SC
Power supply	3P 3W 380/440/480 Vac 60Hz
Rated capacity	4kW	7.5kW	11kW	18kW
Applicable compressor Rated capacity(RT)	3RT	5RT	7RT	12RT
Applicable compressor Rated capacity(W)	10.5kW	17.7kW	24.6kW	41.8kW
Input/Output specitications	4-20mA input, start signal input, RS-485 Modbus communication input, discharge temperature sensor input, alarm signal output, compressor output
Remarks	Double short circuit protection
Reactor	KAT0506	KAT0502	KAT0507