Baldor EM3615T 5 HP NEMA Premium TEFC Motor, 184T Frame

Overview

The Baldor EM3615T is a 5 horsepower, three-phase, totally enclosed fan cooled (TEFC) induction motor from the Baldor-Reliance general purpose range, built by ABB Motors and Mechanical Inc. It runs at 1755 rpm on a 60 Hz supply, is wound for 230/460 V, and sits in a NEMA 184T rigid base frame with F1 mounting. Rated for NEMA Premium efficiency, it is a common replacement for 5 HP motors on pumps, fans, blowers, compressors and conveyors. Its nameplate also carries a 50 Hz rating of 5 HP at 190/380 V, which is important for users outside North America.

Seven Star LLC supplies the Baldor EM3615T and other Baldor-Reliance motors to maintenance teams, OEM skid builders and contractors in Muscat, across the Sultanate of Oman and the GCC. Many packaged chillers, pump skids, air compressors and process packages imported from the United States arrive with NEMA frame motors, and an exact catalog number replacement saves time on foundation, coupling and wiring changes. We provide engineering support in Muscat for motor replacement and spares.

Operating Principle

As general engineering background, a three-phase squirrel cage induction motor produces a rotating magnetic field in its stator windings; the field induces currents in the rotor bars, and the interaction of field and rotor current produces torque. The rotor always turns slightly slower than the synchronous speed of the field, and this slip increases with load. A four pole motor such as the Baldor EM3615T has a synchronous speed of 1800 rpm at 60 Hz, and the manufacturer’s performance data show the speed falling from 1799 rpm at no load to 1753 rpm at full load, with a nameplate speed of 1755 rpm.

The NEMA Design B classification of the Baldor EM3615T defines a normal starting torque and starting current characteristic suited to centrifugal pumps, fans and most general machinery. The data packet lists a locked rotor torque of 34.7 lb-ft, a pull-up torque of 23.4 lb-ft, a breakdown torque of 53.1 lb-ft and a starting current of 49.8 A at 460 V, with KVA code J. In the TEFC design an external shaft-mounted fan blows air over the finned or smooth frame while the internal parts stay sealed from dust and moisture, so heat is removed without exposing the windings.

Engineering Design of the Baldor EM3615T

The Baldor EM3615T has a steel frame with rigid base in NEMA 184T dimensions, a 1.125 inch shaft at the pulley end and an overall length of 18.05 inches, with standard lifting lugs and an F1 conduit box position. It uses ball bearings, 6206 at the drive end and 6205 at the opposite drive end, greased with Polyrex EM. Nine flying leads of 16 AWG allow connection for 230 V or 460 V, and the rated current is 13.4 A at 230 V or 6.7 A at 460 V. The Class F insulation system operates with a temperature rise of 71 °C at rated load and 86 °C at service factor load in a 40 °C ambient, giving thermal margin for continuous duty.

The nameplate marks the Baldor EM3615T as inverter ready for PWM drives, with a usable speed range of 6 to 60 Hz (10:1) for constant torque loads and 3 to 60 Hz (20:1) for variable torque loads. It also states a 50 Hz rating of 5 HP at 190/380 V, 15.6/7.8 A, with a service factor of 1.0. Before installing on a 400 or 415 V, 50 Hz network, users should check this rating against their supply voltage and load, because the 50 Hz rating is at 380 V. Agency marks listed are CURUS, EEV and NEMA Premium, and the nominal efficiency is 89.5% with a power factor of 78.

Key Features

The main features of the Baldor EM3615T from the manufacturer’s data packet are:

• NEMA Premium efficiency with a nominal full load efficiency of 89.5%.
• 5 HP, 4 pole, 1755 rpm at 60 Hz, dual voltage 230/460 V.
• Nameplate 50 Hz rating of 5 HP at 190/380 V with a service factor of 1.0.
• TEFC enclosure for dusty and humid environments.
• NEMA 184T rigid base steel frame with 1.125 inch shaft and F1 mounting.
• Class F insulation, 1.15 service factor at 60 Hz, 40 °C ambient, continuous duty.
• Inverter ready, with 10:1 constant torque and 20:1 variable torque speed ranges.
• Ball bearings 6206 and 6205 with Polyrex EM grease.

Industrial Applications

A 5 HP four pole motor is one of the most common ratings in industry and building services. The Baldor EM3615T drives centrifugal pumps for chilled water, condenser water, domestic water and process transfer, belt driven fans and blowers in air handling units, cooling towers and exhaust systems, small screw and reciprocating air compressors, conveyors, mixers and agitators. Because it is inverter ready, it can be paired with a variable frequency drive to save energy on pumps and fans that run at partial load for much of the day, and its NEMA dimensions make it a direct replacement on equipment built for the North American market.

In Oman and the GCC the Baldor EM3615T is found on packaged HVAC equipment, water treatment and desalination skids, oil and gas utility packages, food processing lines and workshops in Muscat, Sohar, Duqm, Salalah and the interior oil fields. Seven Star LLC supplies the Baldor EM3615T together with the drives and spare parts that go with it, helping maintenance teams minimise downtime when a motor fails.

Technical Specifications

The specification data below for the Baldor EM3615T are taken from the ABB Motors and Mechanical customer information packet; typical performance values are not guaranteed.

How to Order

To order the Baldor EM3615T, send Seven Star LLC your request with the catalog number, quantity and the nameplate of the motor being replaced, and our team will prepare a formal quotation. The manufacturer’s customer information packet is available as a datasheet download on this page. Seven Star LLC supplies Baldor-Reliance motors in Oman and the GCC with engineering support in Muscat. For speed control, see drives such as ABB ACS580 General Purpose Variable Frequency Drive (VFD) and ABB ACS550 General Purpose AC Drive 0.75 to 355 kW, and for IEC frame alternatives see ABB 3GBP131260-ASK Motors M3BP.