Can the production levels be adjusted for different loads?

Yes, it features five adjustable levels (Elementary, Light load, Standard, Heavy load, Advanced) set by F12 to match specific load requirements.

What optional functions are available for automation?

Optional functions include start delay, running delay, starting interval delay, over-heat unlock delay, auto-restart (up to 9 times), and storage of the last 9 error messages.

What is the warranty period for this product?

The product comes with a 24-month warranty covering mechanical defects.

Low Voltage Variable-Frequency Drive Frequency Converter 50Hz to 60Hz Soft Start Motor Controller

Name: Low Voltage Variable-Frequency Drive Frequency Converter 50Hz to 60Hz Soft Start Motor Controller
Brand: Yueqing Greenwich Imp & Exp Co., Ltd.
SKU: 2066716275

Zhejiang, ChinaYueqing Greenwich Imp & Exp Co., Ltd.

US$100.00-300.00

1 Piece

Product profile

Customization

Available

Application

General Transducer

Output Type

Triple

Model NO.

R1-PR800-7.5KW

Principle of Work

AC to AC Soft Starter

Switch Mode

PAM Control

Main Circuit Type

Voltage

Voltage of Power Supply

Low Voltage Variable-Frequency Drive

Link of Transformation

AC-AC Variable-Frequency Drive

Nature of DC Power

Voltage Variable-Frequency Drive

Function

Protect The Motor

Brand

Gwiec

Output Form

4-20mA DC Analog Output

Phase

Three Phase

Color

Gray

Product Name

Soft Starter

Power

7.5 Kw

Shell Material

All Refractory Material

Certification

Warranty

24 Months

Transport Package

Export Standard Carton Box

Specification

7.5 KW-315 KW

Trademark

Gwiec

Origin

Yueqing

HS Code

8511409900

Production Capacity

5000

Key features

Soft Start Technology: Superior alternative to star/delta starters, eliminating damaging torque transients and voltage ramp issues.

Multiple Start Modes: Offers 5 modes including Ramp Voltage, Current Limit, Snap Action, and Heavy Load Strong Shock Start.

Comprehensive Protection: Includes voltage loss, over-current, overheat, phase loss, short circuit, and three-phase unbalance protection.

Pump Application Optimization: Reduces hydraulic shocks, minimizes mechanical stress, and prevents damage from blocked pipes or reverse rotation.

Fan Application Benefits: Ensures smooth torque application to prevent mechanical stress and reduces starting times compared to star/delta.

Adjustable Production Levels: Five production levels (Elementary to Advanced) set by F12 to match specific load requirements.

Flexible Power Supply: Compatible with city power or generators, supporting 220V/380V/440V/660V at 50Hz/60Hz.

Optional Advanced Functions: Features start delay, running delay, auto-restart (up to 9 times), and error message storage.

Company profile

Yueqing Greenwich Imp & Exp Co., Ltd.

Zhejiang, China

Business Type: Manufacturer/FactoryExport Year: 2017-07-19Nearest Port: ningboAverage Response Time: ≤9.36hTerms of Payment: LC, T/T, PayPalInternational Commercial Terms(Incoterms): FOB

AI-Powered supplier vetting

SummaryYueqing Greenwich Imp & Exp Co., Ltd. is identified as a China-based manufacturer/factory and limited company located in Zhejiang, with a factory in the Qiligang/Liushi area. The supplier reports ISO 9001 certification, 10 production lines, 6–10 R&D engineers, and 6–10 quality-control staff. Listed production capacities are 90,000 contactors, 210,000 circuit breakers, 30,000 switches, and 60,000 relays. Its product scope centers on electrical components including MCCBs, MCBs, contactors, relays, starters, and circuit breakers. Export activity reportedly began in 2017, with 41%–50% of sales from exports and exports conducted directly or through agents. The records provide limited evidence on after-sales service, financial credibility, innovation, customization, and customer-case depth. Trade records show one transaction associated with a Kazakhstan buyer in February 2025, but monetary figures are omitted.

Supplier typeThe supplier is explicitly classified as a Manufacturer/Factory and Limited Company, with its head office and factory located in Zhejiang, China. However, another record describes the company nature as a trading company, indicating a mixed or potentially inconsistent classification across the available data.

CertificationsThe supplier reports holding ISO 9001 certification for its management systems. This is explicit evidence of a documented quality-management certification, although no certification scope, issuing body, or validity dates are provided.

R&D capabilityThe supplier reports 6–10 years of total R&D-engineer experience, and its company description mentions continuous improvement and innovation. These provide some positive indication of development capability, but no specific patents, proprietary products, R&D projects, or new-product examples are supplied.

Production capacityThe supplier reports 10 production lines, 6–10 quality-control staff, and stated annual capacities of 90,000 contactors, 210,000 circuit breakers, 30,000 switches, and 60,000 relays. The same capacity figures appear consistently across two records, and a physical factory location plus ISO 9001 certification are reported, supporting a positive assessment of production capability.

Product Q&A

Q:What are the main advantages of this soft starter over star/delta starters?

It eliminates damaging torque transients during switching, provides better control over start current levels, and ensures smooth voltage ramp down for stopping, which star/delta starters lack.

Q:What start modes are available for this soft starter?

It supports five modes: Ramp voltage start, Current limit start, Snap action + Ramp voltage start, Snap action + Current limit start, and Heavy load strong shock start.

Q:What protection functions does the device include?

It offers protection against voltage loss, undervoltage, overvoltage, over-current, overheat, starting over time, phase losses, three-phase unbalance, and short circuits.

Q:Is this soft starter suitable for pump applications?

Yes, it reduces hydraulic shocks, minimizes mechanical stress on the motor shaft, prevents damage from blocked pipes, and includes automatic reset functionality for unmanned stations.

Q:What are the environmental operating conditions?

It operates at altitudes under 3000 meters, temperatures from -25 to +40 degrees Celsius, and humidity under 90% RH, with IP20 protection level.