Import 5.5kw -600kw Soft Starters 220v-690v 3phase — Buy in wholesale FOB from Supplier in China

The Emheater soft starter covers motor ratings from 5.5 kW to 600 kW across three-phase supply voltages of 220 V to 690 V. The unit reduces starting current and supply peak current, which lowers the cost of upstream distribution equipment and reduces mechanical abrasion on the motor and driven machinery. Multiple selectable starting parameters allow one starter to be configured for different motors without hardware changes. The controller monitors motor feedback voltage for closed-loop control, improving start-up reliability across varying load conditions. Starting methods include voltage ramp for maximum output torque and current-limiting mode for strict starting current control. The design uses computer simulation and SMT production processes. Each unit undergoes high-temperature aging and vibration testing before delivery.

The power semiconductor stack typically employs thyristor (SCR) pairs in anti-parallel configuration, standard for 3-phase soft starter topology. Voltage ramp starting applies a controlled increase in terminal voltage over a set time, while current limiting caps the inrush to a preset multiple of full-load current. Closed-loop feedback via motor terminal voltage sensing compensates for supply fluctuations and load variation. Electromagnetic compatibility (EMC) performance is tested to withstand industrial electrical noise. The wide voltage range (220 V to 690 V) accommodates both standard 400 V networks and higher-voltage industrial installations. Typical current ratings scale from approximately 12 A at 5.5 kW/400 V to over 1000 A at 600 kW/690 V, though buyers should confirm exact current classes with Emheater for their application.

Primary buyers include plant engineers at water treatment facilities, HVAC contractors, mining operations, and manufacturing lines running large induction motors. Pump and fan applications benefit particularly from reduced mechanical shock during start-up. Conveyor systems and compressors also use these starters to extend belt, coupling, and bearing life. The 220 V capability suits regions with lower distribution voltages, while 690 V covers heavy industrial European and Asian standards. Buyers should confirm whether the selected kW rating includes derating factors for ambient temperature, altitude, or switching frequency. Protection features such as overload, phase loss, and over-temperature trips should be verified against the specific motor and duty cycle.

Emheater is located at Room 6036, Dongbian Business Building, Minzhi Street, Longhua District, Shenzhen, 518000, Guangdong, China. The company holds a harbor trust tier on the platform. The response rate is recorded at 0.00 percent with an average response time of zero hours, which suggests the profile may be new or the supplier has not yet engaged with buyer inquiries through this channel. Buyers should note this lack of response history and plan direct contact accordingly.

The listing describes Emheater as a manufacturer employing computer simulation design, SMT production, and pre-shipment environmental and mechanical testing. No information is provided about year of establishment, factory floor area, number of employees, annual revenue, specific certifications, or named clients. Buyers should request a company profile, quality management system certificates, and reference installations before committing to large orders. The address in Shenzhen places Emheater within a major electronics and automation manufacturing cluster, which may support supply chain and technical service access.