Techtop Motors GR3-CI-OP-256T-4-BR-D-20 TechTop GR3-CI-OP-256T-4-BR-D-20 — 20 HP Three Phase ODP motor, 256T frame, 4 POLE…

Name: Techtop GR3-CI-OP-256T-4-BR-D-20: 20 HP, 3-phase, 256T frame, ODP motor, 230/460V, IE3 NEMA Premium, UL/CSA/DoE certified.
Brand: Techtop Motors
SKU: GR3-CI-OP-256T-4-BR-D-20
Availability: InStock

Documents & Media

3D CAD Model (STEP)Specification Sheet Manufacturer Product Website

Contact for Pricing

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The Techtop GR3-CI-OP-256T-4-BR-D-20 is a 20 HP, three-phase, 256T frame open drip-proof (ODP) motor designed for industrial applications requiring reliable, high-efficiency operation. This NEMA Premium IE3 motor delivers 93% nominal efficiency at 1760 RPM (60Hz) or 1770 RPM (50Hz), ensuring energy savings and compliance with DOE regulations. Rated for 230/460V dual-voltage operation, it supports both 60Hz and 50Hz frequencies, making it versatile for global installations. Key electrical specifications include a service factor of 1.15 (ODP) or 1.25 (TEFC variant), rated current of 48.78/24.39A (high/low voltage), and a locked rotor torque of 256% of full load. The motor features NEMA Design A (ODP) or Design B (TEFC) characteristics, with a breakdown torque of 339% (ODP) or 352% (TEFC) and pull-up torque of 190% (ODP) or 206% (TEFC). Tropicalization and IP55 ingress protection ensure durability in harsh environments, while the 7024 graphite grey coating provides corrosion resistance. Mechanical robustness is highlighted by C3-class bearings (6309 DE/NDE), a 50.6°C temperature rise at full load, and a moment of inertia of 0.143 kg·m² (ODP) or 0.211 kg·m² (TEFC). The motor’s dual-voltage, 12-lead wiring configuration simplifies installation and compatibility with variable frequency drives (VFD). Certified to UL, CSA, and DOE standards (File Nos. 323353, 224693, 096A), this motor meets rigorous safety and performance benchmarks. Ideal for pumps, fans, compressors, and material handling systems, the GR3-CI-OP-256T-4-BR-D-20 is optimized for continuous duty in industrial facilities. Its high efficiency reduces operational costs, while the robust construction ensures long-term reliability. The ODP enclosure is suited for clean, well-ventilated environments, while the TEFC variant (alternate model) offers added protection for dusty or outdoor applications.

20 HP, 256T frame, 3-phase ODP motor with 93% nominal efficiency
Dual-voltage operation: 230/460V, 60Hz and 50Hz compatible
NEMA Premium IE3 efficiency, DOE compliant, UL/CSA certified
Service factor 1.15 (ODP) or 1.25 (TEFC variant), IP55 ingress protection
12-lead wiring for VFD compatibility, tropicalized for harsh environments

Specifications

2E	10 in
A	12.4 in
AA	1 1/4 in
AB	8.82 in
BA	4.25 in
C	25.8 in
D	6.25 in
E	5 in
ES	2.91 in
F1	10.25 in
F2	12 in
H	0.83 in
N-W	4 in
O	12.5 in
P	12.4 in
R	1.416 in
S	0.375 in
U	1.625 in

Frequently Asked Questions

What is the rated motor output power for this model?

The rated motor output power for the GR3-CI-OP-256T-4-BR-D-20-230|460-60 is 20 HP.

What are the available rated motor voltages?

The rated motor voltages are 230 Volts and 460-60 Volts for 3 Phase operation.

What is the frame size of this motor?

The motor has a frame size of 256.

What is the enclosure type for this motor?

The enclosure type is TEFC (Totally Enclosed Fan Cooled).

What is the approximate weight of the motor?

The approximate weight of the motor is 348 lbs.

What is the NEMA design class for this motor?

This motor is NEMA Design B.

What is the IP rating of the motor's enclosure?

The motor has an IP rating of 55.

What is the insulation class of the motor?

The insulation class for this motor is F.

Does this motor have tropicalization?

Yes, this motor is equipped with tropicalization.

What is the duty cycle of the motor?

The motor is rated for continuous duty (Cont.).

Frequently Asked Questions about Techtop Motors

What certifications and standards do Techtop Motors products comply with?

Techtop Motors products comply with NEMA Premium® efficiency standards, IEEE 841 for severe duty applications, and MG1 Part 31 for safe VFD use. Additionally, they feature IP55 ingress protection and are constructed with corrosion-resistant materials, ensuring durability and reliability in industrial environments.

What is Techtop Motors's warranty policy?

Techtop Motors offers a 36-month warranty from the date of purchase on their electric motors, ensuring protection against defects in materials and workmanship. This warranty reflects Techtop's commitment to quality and customer satisfaction.

What industries and applications are Techtop Motors products used for?

Techtop Motors products are utilized across a wide range of industries, including manufacturing, processing, agriculture, HVAC, and heavy-duty applications. Their motors are designed for powering machinery such as pumps, fans, conveyors, and compressors, ensuring reliable performance and energy efficiency in demanding environments.

What technical support does Techtop Motors offer?

Techtop Motors offers comprehensive technical support, including pre-sale and post-sale assistance through a fully trained customer service team. Our support extends to application-driven engineering, ensuring that customers receive expert guidance tailored to their specific needs. Additionally, we provide access to live inventory, electrical and dimensional data, and downloadable brochures via our website.

What are the main product lines offered by Techtop Motors?

Techtop Motors offers a diverse range of industrial electric motors, including NEMA Premium Efficiency motors, IEEE 841 Severe Duty motors, JM/JP Pump motors, and Explosion Proof motors. Their product lines also feature options in both cast iron and aluminum constructions, as well as specialized motors for applications like cooling towers and washdown environments. With horsepower ratings ranging from 1/8 to 500 HP and various frame sizes, Techtop Motors is equipped to meet a wide array of industrial automation needs.

What are the key features of Techtop Motors products?

Techtop Motors products feature NEMA PREMIUM® operating efficiency, ensuring reduced energy costs and enhanced performance. They are designed with hand-inserted lap wound stators for smooth operation, true copper windings for reduced loss, and full cast iron construction for durability. Additional features include IP55 ingress protection, automatic moisture drainage, and a 36-month warranty, making them ideal for demanding industrial applications.

What communication protocols do Techtop Motors products support?

Techtop Motors products support a comprehensive range of communication protocols including PROFIBUS DP V1, PROFINET with dual port, EtherNet/IP with dual port, CANopen, and Modbus RTU integrated as standard. These protocols facilitate efficient communication and integration within industrial automation systems, enhancing system performance and diagnostics.

What environmental ratings do Techtop Motors products have?

Techtop Motors products feature environmental ratings such as IP55 and IP56, providing robust protection against dust and water ingress. These ratings ensure reliable performance in various industrial environments, with options for oil seals and labyrinth seals for enhanced durability.

What accessories are available for Techtop Motors products?

Techtop Motors offers a variety of accessories for their products, including C & D flanges for versatile mounting options, aluminum and rolled steel C-face conversion kits, and multi-mount removable mounting feet for easy installation. Additionally, their motors feature color-coded oversized lead wires for simplified connections and automatic grease purge systems to prevent over-greasing, enhancing maintenance efficiency.

How are Techtop Motors products typically installed?

Techtop Motors products are designed for straightforward installation, featuring multi-mount removable mounting feet that allow for easy repositioning of the conduit box. Their lightweight designs facilitate handling in difficult-to-reach locations, while color-coded oversized lead wires simplify electrical connections. Additionally, the motors are equipped with features such as automatic grease purge and double lip shaft seals, ensuring reliable operation and maintenance ease.