Is the motor suitable for constant speed operation?

Yes, it is designed for constant speed operation with a direct on-line starting mode.

What duty cycle does the motor support?

The motor is rated for continuous duty S1.

High Efficiency Explosion Flame Proof Electric Asynchronous Induction Electrical AC Motor

Name: High Efficiency Explosion Flame Proof Electric Asynchronous Induction Electrical AC Motor
Brand: Hengshui Milestone Motor Technology Co., Ltd.
SKU: 1992817942

Hebei, ChinaHengshui Milestone Motor Technology Co., Ltd.

US$112.00-6,799.00

3 SET

Product profile

Application

Industrial

Operating Speed

Constant Speed

Number of Stator

Three-Phase

Model NO.

Ex-Proof-H

Species

Explosion-Proof Three-Phase

Rotor Structure

Squirrel-Cage

Casing Protection

Explosion-Proof Type

Number of Poles

2.4.6.8.10.

Starting Mode

Direct on-line Starting

Certification

ISO9001, CCC

Brand

Milestone

Item

Three Phase Asynchronous Motor

Phase

Three Phase

Voltage

380, 660V, 380V/660V, Customized

Temperature

- 15~40 Degree

Rated Output

0.18-315kw (0.25-425HP)

Rated Frequency

50Hz(60Hz Available)

Duty

Cooling Method

IC411

Protection Feature

IP55

Insulation Class

F Class

Working Condition

Not Exceeding 1000m Above Sea Level

Transport Package

Wooden Case

Specification

According Frame Size

Trademark

Milestone

Origin

China

HS Code

8501520000

Production Capacity

200, 000 Sets/Annual Output

Key features

High Efficiency Explosion Proof: Designed for petroleum, chemical, and coal industries with high operational safety.

Wide Power Range: Available from 0.18kW to 315kW (0.25-425HP) across multiple series.

Customizable Voltage: Supports 380V, 660V, 380V/660V, and fully customized voltage options.

Multiple Pole Options: Available in 2, 4, 6, 8, and 10 poles to suit various speed requirements.

IP55 Protection Class: Provides excellent protection against dust and water jets for industrial use.

Low Noise and Vibration: Engineered for excellent performance with minimal noise and vibration levels.

S1 Continuous Duty: Rated for continuous duty cycle (S1) suitable for constant operation.

Explosion-Proof Grade: ExdIIBT4Gb rating suitable for underground coal mines and explosive gas areas.

Company profile

High Repeat Buyers ChoiceExhibition ExperienceFull CustomizationManagement Certification

Hengshui Milestone Motor Technology Co., Ltd.

Hebei, China

Business Type: Manufacturer/FactoryAverage Response Time: ≤3.37h

AI-Powered supplier vetting

SummaryHengshui Milestone Motor Technology Co., Ltd. is identified as a China-based manufacturer/factory in Hebei producing electric motors, including induction, three-phase, special, explosion-proof, high-voltage, and variable-frequency motors. The supplier reports extensive product certifications, including CE, China 3C, CQC, China energy-saving, explosion-proof, KA, and MA certifications, as well as ISO9001, ISO14001, and ISO45001 management-system certifications. Its business description states that it is an early developer and promoter of energy-saving Y-series motors in China and focuses on motor research. A TUV Rheinland audit record is listed as valid from May 19, 2025 to May 18, 2026, but the audit result is coded as “0” without an interpretation. Evidence is insufficient to confirm after-sales services, financial credibility, innovation services such as ODM or SDK support, production scale, customization, or customer cases. Several supplier capability fields are explicitly marked unknown.

Supplier typeThe supplier is identified as Hengshui Milestone Motor Technology Co., Ltd., a China-based manufacturer/factory located in Hebei and operating in the motor manufacturing sector. However, another record describes its company nature as a trading company, creating a classification inconsistency that should be clarified.

CertificationsThe supplier reports CE, China 3C, CQC, China energy-saving, explosion-proof, KA, and MA product certifications, along with ISO9001, ISO14001, and ISO45001 management-system certifications. A TUV Rheinland audit is also recorded for the period from May 19, 2025 to May 18, 2026, although the coded audit result is not explained.

R&D capabilityThe company states that it focuses on motor research and was among the early Chinese enterprises to design, produce, and promote new energy-saving Y-series motors. Nevertheless, ODM, SDK, private-mold, 3D-design, and new-product R&D service statuses are all unknown, so the breadth of its current innovation services cannot be confirmed.

Production capacityThe supplier is listed as a manufacturer/factory offering multiple electric-motor categories, and its company description characterizes it as a large second-tier national enterprise and a top-500 Chinese machinery enterprise. However, manufacturing capacity, inventory capability, order fulfillment details, and production scale are not sufficiently documented; the order fulfillment field contains only an unexplained code.