CMC-HX Electronic Soft Starter for Induction Motor – 3 Phase, 380V, 7.5-710 kW
XICHI CMC-HX is an intelligent low-voltage 3 phase soft starter 380V for squirrel-cage AC induction motors. It combines soft start, soft stop, display, protection and data collection in one unit – covering 7.5–710 kW at 380V (18–1400 A), with a built-in current transformer, SCR closed-loop control, Modbus RTU / RS485 communication and comprehensive motor protection. As a long-term XICHI distributor we supply the CMC-HX as part of the low-voltage soft starter range, which runs from 18 A to 1400 A.
Key Specifications at a Glance
| Parameter | Value |
|---|---|
| VOLTAGE & PHASE | 3-phase, AC380V / 690V / 1140V (±15%) |
| CURRENT | 18A–1400A (24 ratings) |
| CONTROL | Soft Start / Soft Stop (4 start curves, current-limit & voltage-ramp) |
| POWER | 7.5–710 kW |
| OVERLOAD | Electronic Thermal Overload (trip class 10A/10/15/20/25/30/Off) |
| COMMUNICATION | Modbus RTU / RS485 (optional Ethernet / GPRS) |
Key Features
- SCR closed-loop control – current-limit or voltage-ramp start for smooth, oscillation-free starting
- 10 built-in load types with a dedicated start curve for each (pumps, fans, conveyors, crushers, mixers, etc.)
- Four start curves + programmable kick start and current-limit start
- Multiple stop modes: free stop, soft stop, pump stop and braking
- Built-in current transformer – no external CT needed
- Standard Modbus RTU / RS485; optional Ethernet (Modbus TCP/IP) and GPRS modules
- 0-20 mA / 4-20 mA analog input & output with adjustable limits
- Full protection: overcurrent, electronic thermal overload, underload, overheat, phase failure, imbalance, phase sequence, frequency error
- Dual parameter sets – one unit controls two motors of different ratings
- 50/60 Hz auto-adaptation, dynamic fault memory (up to 10 faults), LCD display
Basic Parameters
| Control supply | AC110V–10% ~ AC220V+15%, 50/60 Hz |
| Three-phase supply | Standard wiring AC380V / 660V / 1140V ±15%; internal delta wiring AC380V ±15% |
| Nominal current | 18A ~ 1400A, 24 ratings |
| Applicable motor | Standard squirrel-cage 3-phase AC asynchronous (induction) motor |
| Start modes | Voltage exponential / linear curve; current exponential / linear curve; current-limit start; kick (step) start |
| Stop modes | Free stop, soft stop, pump stop, braking |
| Start / stop control | Keyboard, RS485, keyboard+485 or inching |
| Logical input | Impedance 1.8 kΩ, supply +24V |
| Analog I/O | 0-20 mA / 4-20 mA input & output, adjustable upper/lower limits |
| Protective functions | Overcurrent, electronic thermal overload, underload, overheat, phase failure, three-phase current imbalance, phase sequence, motor overheat, frequency error |
| IP rating | IP00 / IP20 |
| Cooling / installation | Natural cooling or forced air cooling; wall-mounted, vertical installation |
| Ambient conditions | -25°C ~ +45°C, RH <95% (20°C ±5°C); derating required above 2,000 m altitude; vibration <0.5G |
Model Specifications (380V / 660V / 1140V)
| Rated Current (A) | Power @ 380V (kW) | Power @ 660V (kW) | Power @ 1140V (kW) |
|---|---|---|---|
| 18 | 7.5 | 15 | 22 |
| 24 | 11 | 22 | 33 |
| 30 | 15 | 30 | 45 |
| 39 | 18.5 | 37 | 55 |
| 45 | 22 | 45 | 65 |
| 60 | 30 | 55 | 90 |
| 76 | 37 | 75 | 110 |
| 90 | 45 | 90 | 135 |
| 110 | 55 | 110 | 165 |
| 150 | 75 | 132 | 225 |
| 180 | 90 | 160 | 280 |
| 218 | 110 | 200 | 344 |
| 260 | 132 | 250 | 400 |
| 320 | 160 | 300 | 505 |
| 370 | 185 | 350 | 584 |
| 440 | 220 | 400 | 695 |
| 500 | 250 | 456 | 789 |
| 560 | 280 | 500 | 884 |
| 630 | 315 | 560 | 995 |
| 780 | 400 | 700 | – |
| 920 | 470 | – | – |
| 1000 | 530 | – | – |
| 1200 | 630 | – | – |
| 1400 | 710 | – | – |
Model coding: e.g. CMC-315/3-HX – applicable motor power (kW) / mains voltage class (3 = 380V) / HX series; communication option 0 = standard, 1 = Ethernet card, 2 = GPRS.
Applications
- Pumps and fans
- Conveyors and belt systems
- Compressors
- Centrifuges
- Crushers and mills
- Mixers and agitators
- HVAC systems
- Mining equipment
- Water and wastewater treatment
Low voltage soft starters are widely used in industrial processes where controlled acceleration and deceleration of electric motors are essential for efficient, reliable operation.
FAQ
What is the CMC-HX soft starter used for?
The CMC-HX is an intelligent low-voltage electronic soft starter for standard squirrel-cage 3-phase AC induction motors. It provides smooth soft start and soft stop while protecting the motor and driven equipment, and is widely used for pumps, fans, conveyors, compressors, crushers, mixers and HVAC systems.
What voltage and phase does the CMC-HX soft starter support?
The CMC-HX is a 3-phase soft starter. Standard wiring supports AC380V, AC660V and AC1140V (±15%); internal delta wiring supports AC380V (±15%). The control supply is AC110V to AC220V, 50/60 Hz.
What are the power and current ranges of the CMC-HX series?
The CMC-HX series covers 7.5–710 kW at 380V, 15–700 kW at 660V and 22–995 kW at 1140V, with nominal rated currents from 18A to 1400A across 24 ratings.
What protection functions does the CMC-HX provide?
It provides overcurrent, electronic thermal overload (trip class 10A/10/15/20/25/30 or off), underload, overheat, phase failure, three-phase current imbalance, phase sequence detection, motor overheat and frequency-error protection.
How does the CMC-HX communicate with PLCs and SCADA systems?
The CMC-HX is equipped with a standard RS485 port using the Modbus RTU master-slave protocol, connecting up to 32 devices (address 1–32, baud rate 1200–19200). Optional Ethernet (Modbus TCP/IP) and GPRS communication modules are available.
Does the CMC-HX soft starter need an external current transformer?
No. The CMC-HX has a built-in current transformer, so no external CT is required, which simplifies installation and saves cost.
Which CMC Soft Starter Series Fits Your Motor
The CMC-HX covers 7.5 – 710 kW at 380 V, 660 V and 1140 V. Two further XICHI families cover the lower power ranges with the same control concept: the CMC-LX series, 7.5 – 630 kW with built-in bypass, and the CMC-MX series, 7.5 – 280 kW with internal bypass contactor. For the wider picture of how these soft starters sit alongside our VFDs, power supplies and protection devices, see the industrial drives overview.
Request a Quotation
Send us the motor nameplate data (power, current, voltage and speed), the supply voltage and the load type, and tell us whether you will use standard or internal delta wiring. We will confirm the CMC-HX rating, the communication option (standard RS485, Ethernet or GPRS) and a written quotation. You can also see how these starters are used on site on our soft starter projects page, and read more about Brigoind.
