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Low Voltage Explosion-Proof Motors
NEX NEMA Premium Explosion-Proof Motor, Class I Div.1
Wolong Nanyang NEX NEMA Premium explosion-proof motor: Class I Div.1 C, D and Class II Div.1 E, F, G, T3C, 1-250 HP, 143T-449T, 460 / 575 V.
- Genuine Wolong Nanyang motor with original factory documents
- ATEX / IECEx certificates available for explosion-proof models
- Quotation and model check within 24 hours
- Shipping worldwide by sea or air, CIF or with your forwarder
Product Description
The NEX is an explosion-proof, NEMA Premium efficiency three-phase induction motor for North American hazardous locations, developed by Nanyang Explosion Protection Group to NEMA standards for frames 143T to 449T. Ratings, mounting dimensions and electrical performance follow NEMA, so it replaces NEMA explosion-proof motors directly.
It is listed for Class I, Division 1, Groups C and D and Class II, Division 1, Groups E, F and G, temperature code T3C, with one thermistor per phase that trips at 145 °C.
Key Specifications
| NEMA frame | 143T - 449T |
|---|---|
| Rated power | 1 - 250 HP |
| Speed | 3600, 1800 or 1200 rpm at 60 Hz |
| Design | NEMA Design B, NEMA Premium efficiency |
| Voltage | 208-230/460 V and 575 V, 3-phase, 60 Hz |
| Insulation | class F with class B rise at 1.0 SF |
| Service factor | 1.15 |
| Protection | IP55 |
| Duty | continuous |
| Ambient / altitude | up to 40 °C, up to 3300 ft (1000 m) |
| Hazardous locations | Class I Div.1 Groups C, D; Class II Div.1 Groups E, F, G; T3C |
| Winding protection | one thermistor per phase, trips at 145 °C |
Construction
- Stator: high-quality steel laminations and magnet wire, vacuum pressure impregnated (VPI) for electrical strength, moisture resistance and thermal stability
- Rotor: cast aluminium, shrunk onto the shaft and dynamically balanced for low vibration
- Bearings: shielded ball bearings on 143T - 215T; open bearings with caps and grease fittings on 254T - 449T
- Conduit box: cast iron, centrally located, F1 / F2 convertible, NPT threads, grounding bolts, connection diagram
- Fan in plastic or cast iron; fabricated fan cover as standard, cast-iron fan cover for severe duty
Performance Data
Performance at 460 V, 60 Hz from the NEX catalog. FLA = full-load amps, LRA = locked-rotor amps, LRT / BDT = locked-rotor / breakdown torque in % of full-load torque.
NEX performance data at 460 V, 60 Hz (51 ratings)
Values from the catalog; final data are confirmed with the order.
| HP | Speed (rpm) | FLA (A) | LRA (A) | Code | Eff. 1/2 (%) | Eff. 3/4 (%) | Eff. nominal (%) | Eff. min. (%) | Power factor (%) | LRT (%) | BDT (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1773 | 1.35 | 15 | N | 81.3 | 84.5 | 85.5 | 82.5 | 78.5 | 311 | 412 |
| 1 | 1175 | 1.65 | 15 | N | 78.0 | 81.0 | 82.5 | 80.0 | 66.0 | 342 | 341 |
| 1.5 | 3511 | 1.85 | 20 | M | 83.5 | 85.1 | 84.0 | 81.5 | 84.5 | 289 | 378 |
| 1.5 | 1769 | 1.95 | 20 | M | 83.0 | 86.0 | 86.5 | 84.0 | 79.0 | 291 | 377 |
| 1.5 | 1183 | 2.07 | 20 | M | 84.5 | 87 | 87.5 | 85.5 | 71.0 | 239 | 341 |
| 2 | 3504 | 2.5 | 25 | L | 85.3 | 86.0 | 85.5 | 82.5 | 86.0 | 219 | 252 |
| 2 | 1765 | 2.6 | 25 | L | 84.0 | 86.0 | 86.5 | 84.0 | 83.7 | 250 | 298 |
| 2 | 1183 | 2.8 | 25 | L | 86.0 | 88.0 | 88.5 | 86.5 | 73.0 | 249 | 324 |
| 3 | 3528 | 3.5 | 32 | K | 85.5 | 87.0 | 86.5 | 84.0 | 87.0 | 187 | 307 |
| 3 | 1761 | 3.8 | 32 | K | 87.5 | 89.0 | 89.5 | 87.5 | 77.0 | 232 | 322 |
| 3 | 1182 | 3.95 | 32 | K | 87.5 | 89.0 | 89.5 | 87.5 | 71.0 | 295 | 349 |
| 5 | 3525 | 6 | 46 | J | 85.0 | 87.0 | 88.5 | 86.5 | 85.0 | 177 | 306 |
| 5 | 1756 | 7 | 46 | J | 87.0 | 89.2 | 89.5 | 87.5 | 81.0 | 187 | 265 |
| 5 | 1178 | 7.5 | 46 | J | 85.0 | 89.5 | 89.5 | 87.5 | 75.0 | 222 | 275 |
| 7.5 | 3539 | 8.3 | 63.5 | H | 85.0 | 90.0 | 89.5 | 87.5 | 86.0 | 181 | 262 |
| 7.5 | 1773 | 8.9 | 63.5 | H | 89.0 | 91.5 | 91.7 | 90.2 | 84.0 | 239 | 302 |
| 10 | 3540 | 11.5 | 81 | H | 89.0 | 90.2 | 90.2 | 88.5 | 88.0 | 183 | 264 |
| 10 | 1772 | 12.2 | 81 | H | 90.0 | 92.0 | 91.7 | 90.2 | 82.0 | 251 | 266 |
| 10 | 1178 | 12.5 | 81 | H | 89.0 | 90.0 | 91.0 | 89.5 | 81.0 | 204 | 289 |
| 25 | 3560 | 27.5 | 182.5 | G | 91.5 | 91.9 | 91.7 | 90.2 | 88.0 | 170 | 261 |
| 25 | 1778 | 27.5 | 182.5 | G | 93.1 | 93.6 | 93.6 | 92.4 | 85.0 | 171 | 251 |
| 25 | 1187 | 29.0 | 182.5 | G | 92.8 | 93.2 | 93.0 | 91.7 | 83.0 | 180 | 250 |
| 30 | 3560 | 32.5 | 217.5 | G | 91.5 | 91.9 | 91.7 | 90.2 | 89.0 | 179 | 265 |
| 30 | 1777 | 32.5 | 217.5 | G | 93.1 | 93.7 | 93.6 | 92.4 | 87.0 | 172 | 251 |
| 30 | 1187 | 37.1 | 217.5 | G | 92.8 | 93.2 | 93.0 | 91.7 | 78.0 | 158 | 238 |
| 40 | 3566 | 44.5 | 290.0 | G | 91.8 | 92.4 | 92.4 | 91.0 | 88.0 | 169 | 238 |
| 40 | 1783 | 46.0 | 290.0 | G | 93.9 | 94.2 | 94.1 | 93.0 | 85.0 | 186 | 252 |
| 40 | 1188 | 47.5 | 290.0 | G | 93.9 | 94.3 | 94.1 | 93.0 | 83.0 | 219 | 264 |
| 50 | 3573 | 54.0 | 362.5 | G | 92.4 | 93.0 | 93.0 | 91.7 | 88.0 | 184 | 243 |
| 50 | 1783 | 55.0 | 362.5 | G | 94.2 | 94.6 | 94.5 | 93.6 | 85.0 | 173 | 263 |
| 50 | 1188 | 56.5 | 362.5 | G | 93.9 | 94.3 | 94.1 | 93.0 | 83.0 | 209 | 256 |
| 60 | 3573 | 68.0 | 435.0 | G | 93.1 | 93.6 | 93.6 | 92.4 | 88.0 | 159 | 267 |
| 60 | 1786 | 70.0 | 435.0 | G | 94.2 | 94.9 | 95.0 | 94.1 | 85.0 | 195 | 270 |
| 60 | 1192 | 69.0 | 435.0 | G | 94.1 | 94.5 | 94.5 | 93.6 | 83.0 | 187 | 234 |
| 75 | 3573 | 84.5 | 542.5 | G | 93.2 | 93.6 | 93.6 | 92.4 | 88.0 | 172 | 277 |
| 75 | 1786 | 86.5 | 542.5 | G | 94.5 | 95.3 | 95.4 | 94.5 | 85.0 | 211 | 275 |
| 75 | 1192 | 89.0 | 542.5 | G | 94.2 | 94.6 | 94.5 | 93.6 | 83.0 | 197 | 251 |
| 100 | 3579 | 110.0 | 725.0 | G | 93.7 | 94.1 | 94.1 | 93.0 | 89.0 | 159 | 279 |
| 100 | 1790 | 112.0 | 725.0 | G | 94.8 | 95.4 | 95.4 | 94.5 | 87.0 | 199 | 247 |
| 100 | 1190 | 117.0 | 725.0 | G | 94.7 | 95.1 | 95.0 | 94.1 | 84.0 | 152 | 241 |
| 125 | 3586 | 130.0 | 907.5 | G | 94.2 | 94.8 | 95.0 | 94.1 | 89.0 | 153 | 268 |
| 125 | 1789 | 133.0 | 907.5 | G | 94.8 | 95.4 | 95.4 | 94.5 | 85.0 | 188 | 271 |
| 125 | 1191 | 135.0 | 907.5 | G | 94.7 | 95.1 | 95.0 | 94.1 | 84.0 | 148 | 246 |
| 150 | 3585 | 160.0 | 1085.0 | G | 94.4 | 94.9 | 95.0 | 94.1 | 87.0 | 150 | 256 |
| 150 | 1789 | 162.5 | 1085.0 | G | 95.7 | 95.8 | 95.8 | 95.0 | 86.0 | 164 | 262 |
| 150 | 1191 | 166.0 | 1085.0 | G | 95.3 | 95.8 | 95.8 | 95.0 | 82.0 | 210 | 252 |
| 200 | 3584 | 213.5 | 1450.0 | G | 95.0 | 95.4 | 95.4 | 94.5 | 87.0 | 168 | 264 |
| 200 | 1789 | 223.0 | 1450.0 | G | 95.8 | 96.2 | 96.2 | 95.4 | 85.0 | 187 | 275 |
| 200 | 1191 | 227.5 | 1450.0 | G | 95.5 | 95.9 | 95.8 | 95.0 | 82.0 | 157 | 263 |
| 250 | 3585 | 262.0 | 1825.0 | G | 95.3 | 95.7 | 95.8 | 95.0 | 87.0 | 200 | 280 |
| 250 | 1788 | 268.0 | 1825.0 | G | 96.0 | 96.3 | 96.2 | 95.4 | 85.0 | 228 | 244 |
Model Code
Example NEX284TS-2: NE = NEMA standard, X = explosion-proof, 28 = shaft height code, 4 = code related to the 2F dimension, T = standard shaft, S = short shaft for direct coupling, 2 = poles.
Applications
Pumps, fans, compressors and conveyors in oil and gas, petrochemical, chemical and grain-handling plants with Class I or Class II Division 1 locations.
Common Questions
Division 1 or Division 2?
NEX is for Division 1. For Division 2 / Zone 2 the NSHE is the economical choice.
Can I get 575 V?
Yes, 575 V at 60 Hz as well as 208-230/460 V.
Do you have an inverter-duty version?
Yes, the NEXP is the explosion-proof inverter-duty series for North America.
Documents Supplied with the Motor
For each order we can provide the technical data sheet, outline drawing, routine test report and, for explosion-proof motors, a copy of the Ex certificate that matches the nameplate marking. Tell us in the inquiry which documents your project or your inspector requires, so they are prepared before shipment.
How to Order
For a fast, accurate quotation please send: rated power (kW), voltage and frequency, number of poles or speed, Ex marking or hazardous zone, mounting type, quantity and destination port. For a replacement, a photo of the old motor nameplate is the quickest way to match it.
Frequently Asked Questions
Do your explosion-proof motors have ATEX and IECEx certificates?
Yes. Wolong Nanyang explosion-proof motors, both low-voltage and high-voltage, are available with ATEX and IECEx certificates for Europe and international projects, and GOST for the Russian market. Tell us which certificate you need when you ask for a quote.
Can this motor replace my existing motor?
Yes. For new projects we quote and select the model to your requirements. For a replacement, please send a nameplate photo or outline drawing of the old motor, and we will match the shaft height, mounting and installation dimensions.
Can you supply replacements for Schorch, Brook Crompton or Morley motors?
Yes. Schorch, Brook Crompton and Morley belong to the Wolong Electric Group, and we can supply Wolong motors built to replace them, matched to your mounting dimensions.
Can you ship to my country, and what is the lead time?
Yes. We ship worldwide on CIF terms, or you can use your own forwarder. The usual production time is about 3 months, depending on the model and quantity.
What information do you need for a quotation?
Rated power (kW), voltage and frequency, number of poles or speed, Ex marking or hazardous zone, mounting type (e.g. B3, B35, V1), quantity and destination port. A nameplate photo of the old motor helps if it is a replacement.
Get a Quote for NEX NEMA Premium Explosion-Proof Motor, Class I Div.1
Send us your requirements. An engineer will reply with a model check and price within 24 hours.
