Chongqing Hengtairail Equipment Co.,Ltd.
| Payment Terms | L/C,T/T,Western Union,Paypal |
| Supply Ability | 1,000 pcs/month |
| Delivery Time | 15-50 days, depends on QTY |
| Packaging Details | Carton box, Wooden case, as per requires |
| Type | Protected Type |
| Duty | Continuous |
| Rated Voltage | 426V |
| Rated Current | 450A |
| Rated Speed | 366 r/min |
| Maximum Voltage | 1050V |
| Maximum Current | 630A |
| Maximum Speed | 2210 r/min |
| Excitation Method | Series excitation |
| Insulation Class | H |
| Ventilation Method | Forced external ventilation |
| Cooling Air Volume | 65 m³/min |
| Brand Name | HTR |
| Place of Origin | China |
View Detail Information
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Product Specification
| Payment Terms | L/C,T/T,Western Union,Paypal | Supply Ability | 1,000 pcs/month |
| Delivery Time | 15-50 days, depends on QTY | Packaging Details | Carton box, Wooden case, as per requires |
| Type | Protected Type | Duty | Continuous |
| Rated Voltage | 426V | Rated Current | 450A |
| Rated Speed | 366 r/min | Maximum Voltage | 1050V |
| Maximum Current | 630A | Maximum Speed | 2210 r/min |
| Excitation Method | Series excitation | Insulation Class | H |
| Ventilation Method | Forced external ventilation | Cooling Air Volume | 65 m³/min |
| Brand Name | HTR | Place of Origin | China |
| High Light | EMD D29 DC traction motor ，426V locomotive traction motor ，450A DC motor for locomotives | ||
The D29 traction motor features a compact structure and relatively light weight, making it suitable for narrow-gauge locomotives with limited space while still maintaining high traction performance. Its design is similar to that of the D31 motor, with some interchangeable components such as the armature, though differences exist in insulation, winding, and bearings. Renowned for its high reliability and maintainability, the D29 can be overhauled and extended in service life through processes such as rewinding the main field coils, replacing bearings, and renewing insulation materials. It was widely equipped on EMD export narrow-gauge locomotives such as the G18 and DDM45, becoming one of the classic models in international railway traction systems.
| Product Performance | Reference Value |
| Type | Protected Type |
| Duty | Continuous |
| Rated Voltage | 426 V |
| Rated Current | 450 A |
| Rated Speed | 366 r/min |
| Maximum Voltage | 1050 V |
| Maximum Current | 630 A |
| Maximum Speed | 2210 r/min |
| Excitation Method | Series excitation |
| Insulation Class | H |
| Ventilation Method | Forced external ventilation |
| Cooling Air Volume | 65 m³/min |
Operating Conditions
The motor should operate normally under the following conditions:
a. Altitude not exceeding 1200 m;
b. Ambient air temperature not lower than -25 °C, and not higher than 55 °C (when above 40 °C, for every 4 °C increase, the rated current shall be reduced by 1%);
c. In the most humid month, the monthly average maximum relative humidity shall not exceed 90% (with the same month’s average minimum temperature not higher than 25 °C).
Temperature Rise Limits
When the motor is tested at a voltage of 426 V, a current of 478 A, and under full field excitation, starting from actual cold state for a one-hour temperature rise test, and also during long-duration temperature rise tests at rated voltage, rated current, and full field excitation, the temperature rise limits for each component are as follows.
| Component | Insulation Class | Measurement Method | Temperature Rise Limit (K) |
| Armature Winding | H | Resistance Method | 160 |
| Main Field Winding | H | Resistance Method | 180 |
| Commutating Winding | H | Resistance Method | 180 |
| Commutator | H | Thermometer Method | 120 |
When the cooling air temperature at the motor inlet is 40 °C or below, the temperature rise limit of the armature bearing is 95 °C.
Company Details
Business Type:
Distributor/Wholesaler,Exporter,Trading Company
Year Established:
1999
Total Annual:
$5million-$10million
Employee Number:
50~100
Ecer Certification：
Verified Supplier
Hengtairail Equipment Co., Ltd (hereinafter referred to as “Hengtairail”) was established by Mr. Wei, in 1999. He was as a vehicle engineer in the China Railway Chengdu Bureau. A professional engineer team and high-efficiency sales team have been built at present. Hengt... Hengtairail Equipment Co., Ltd (hereinafter referred to as “Hengtairail”) was established by Mr. Wei, in 1999. He was as a vehicle engineer in the China Railway Chengdu Bureau. A professional engineer team and high-efficiency sales team have been built at present. Hengt...
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