SZ600 Soft Starter Cabinet
The NENA Bypass Soft Starter Cabinet is a high-performance, floor-standing industrial motor control enclosure engineered to eliminate the flaws of direct-on-line (DOL) motor starting. Tailored for industrial motor operation optimization, this all-in-one integrated solution delivers smooth, controlled motor acceleration, low-loss steady-state operation, and comprehensive circuit protection for industrial motors. It effectively resolves…
The NENA Bypass Soft Starter Cabinet is a high-performance, floor-standing industrial motor control enclosure engineered to eliminate the flaws of direct-on-line (DOL) motor starting. Tailored for industrial motor operation optimization, this all-in-one integrated solution delivers smooth, controlled motor acceleration, low-loss steady-state operation, and comprehensive circuit protection for industrial motors. It effectively resolves common DOL starting issues including extreme inrush current, voltage dips, electrical tripping, and mechanical shock to motor equipment.
Featuring a reliable bypass soft start architecture, the cabinet switches to contactor running mode after motor startup to minimize power loss and heat generation. With multiple power rating options, compact footprint, and user-friendly installation design, it adapts perfectly to new motor control installations and legacy system retrofit projects. Widely applicable in water treatment, HVAC, material handling, and general industrial manufacturing, it significantly extends equipment lifespan and enhances overall industrial system stability and operational efficiency.
1.Smooth Bypass Soft Start Operation:
Adopts a mature bypass soft starting design to gradually boost motor voltage during startup, limiting inrush current and torque to achieve gentle, controlled motor acceleration. After the motor reaches rated speed in seconds, the built-in bypass contactor automatically engages to take over operational current. This removes SCRs from the power circuit, drastically cutting operational heat generation and power losses while retaining full soft-start protection advantages.
2.Integrated Reliable Circuit Protection:
Equipped with a centrally installed HUTAI molded case circuit breaker (MCCB) with adjustable thermal-magnetic protection functions, providing precise defense against motor overload and short-circuit faults. The visible ON/OFF status handle enables instant, intuitive confirmation of equipment operating status, facilitating quick on-site inspection and safety management.
3.Durable Industrial-Grade Enclosure & Layout:
Built with robust powder-coated steel housing to withstand harsh industrial working environments. Optimized ventilation structure ensures efficient heat dissipation for long-term stable operation. The partitioned internal wiring layout separates control circuits clearly, simplifying system commissioning, daily inspection, and fault troubleshooting. Wide-access doors allow full and convenient access to core components including MCCB, cable terminals, and optional control modules.
4.Easy Installation & Low Maintenance:
Features reinforced internal busbar structure and standardized organized cable terminals, greatly improving wiring efficiency and compatibility with large-power cables. The compact floor-standing footprint requires no complex structural modifications, fitting most standard MCC room layouts seamlessly. It supports fast on-site installation and routine maintenance, reducing overall engineering and labor costs.
5.Flexible Power Range & Strong Compatibility:
Available in diversified power specifications covering 18.5–75 kW and 90–115 kW, with multiple enclosure size options to match different motor power demands. It supports flexible configuration for new construction projects and old equipment renovation, enabling hassle-free integration into existing industrial control systems.
6.Wide Industrial Application & System Optimization:
Effectively avoids 6–8 times full-load inrush current caused by hard starting, preventing grid voltage fluctuation, accidental power trips, and mechanical damage to couplings, bearings, and gears. Ideal for pumps, fans, compressors, conveyors, and crushing equipment in water & wastewater treatment, HVAC systems, material handling, and general industrial manufacturing, reducing mechanical wear and improving long-term system reliability.
Parameter
| Power level | Overall dimensions (mm) | Installation dimensions (mm) | |||
| A(High | B(Width) | C(Thick) | A(Long) | B(Width) | |
| 18.5-75kW | 790 | 360 | 310 | 366 | 270 |
| 90~115kW | 1030 | 450 | 360 | 343 | 265 |
Typical ratings & dimensions
| Power Range (kW) | Cabinet Size (H × W × D, mm) | Installation Footprint (mm) |
|---|---|---|
| 18.5–75 kW | 790 × 360 × 310 | 366 × 270 |
| 90–115 kW | 1030 × 450 × 360 | 343 × 265 |
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