Should I choose a TEFC motor or an enclosed motor?
A benefit to having the motor totally enclosed is that it’s protected from the outside environment, including dust, airborne contaminants, and many weather disturbances such as wind-driven rain. A TEFC motor is the recommended choice when your load is in an outdoor or wet location.
What is the difference between TEFC and ODP Motors?
NAPCES ODP idler motors are completely safe to use in all indoor industrial settings. On the other hand, a totally enclosed fan cooled, or TEFC motor has a closed off chamber which requires the use of an external fan to blow air over it.
What is the maximum temperature a TEFC motor can run?
Looking at NEC Table 500.8 (C), a maximum 200°C temperature is equivalent to a T3 rating. It isn’t unusual though, in a petrochemical plant, to have areas where the T-code is T3A-T3C. In these cases, normal TEFC motors may run too hot and cannot be used.
Are fan cooled motors allowed in the US?
Sometimes, small motors (480V and less) carry this identification, but often small motors are of the totally enclosed, fan-cooled (TEFC) type, which is allowed in 501.125 (B) (3) if there are no arcing parts such as centrifugal switches or capacitors.
How to reduce motor susceptibility to failure caused by accumulated moisture?
Why should the end housing be rotated?
How to keep a motor dry?
What is a TEFC motor?
How to extend the life of a motor?
Why are internal heaters interlocked?
What causes water to accumulate in a motor?
See 2 more
Can a Tefc motor get wet?
Totally Enclosed Fan Cooled (TEFC) motors are more adaptable to outdoor and high moisture areas. Their enclosed design does not have openings that allow free exchange of air between the inside and outside of the motor, but even so, they are not airtight or watertight.
Can an open drip proof motor be used outside?
The use of open drip-proof motors outdoors or in wet areas is not ideal. In the event of a failure, an open drip-proof motor should be replaced with a motor more suitable for an outdoor or wet environment.
What does Tefc mean on electric motor?
TOTALLY-ENCLOSED FAN-COOLED (TEFC) — Basically a TENV motor which has an external fan to blow cooling air over the motor. The additional cooling eliminates the necessity of a more costly oversized TENV motor.
Can an ODP motor be used outside?
Open Drip Proof (ODP) Operating them outdoors or in contaminated environments will quickly build corrosion and dirt inside the motor, reducing cooling efficiency and shortening the motor's lifespan. They are only suitable for clean, dry, indoor environments, such as equipment manufacturing.
What type of motor enclosure can be used outdoors?
A totally enclosed, fan-cooled (TEFC) motor is much more adaptable to outdoor locations and high moisture areas. With a bit of care, you can expect this type of motor to work well and have a long life.
What is the difference between ODP and TEFC motors?
NAPCES ODP idler motors are completely safe to use in all indoor industrial settings. On the other hand, a totally enclosed fan cooled, or TEFC motor has a closed off chamber which requires the use of an external fan to blow air over it.
Can TEFC motors be used in hazardous locations?
TEFC (Totally Enclosed, Fan Cooled) motors and ODP (Open Drip -proof) motors can be used in Division 2 locations provided they do not have ignition sources such as arc-producing brushes or switching mechanisms.
Can a TENV motor be used outdoors?
TENV motors can be used indoors or outdoors.
What is the difference between Tefc and TENV motors?
Totally Enclosed, Fan-Cooled (TEFC) Motors have an external fan which circulates outside air to the motor. Totally Enclosed, Nonvented (TENV) Motors do not have air openings. While air does not freely move between the inside and outside, the motor's construction is not air- or liquid-tight.
Is IP55 a Tefc?
Totally enclosed, fan-cooled (TEFC) motors often feature IP ratings of IP54 or IP55, which permit a very limited amount of dust to intrude into the motor enclosure and protect the motor against splashing (e.g., IP54) or directed water jets (e.g., IP55).
What does the ODP mean for electric motor?
Open Drip ProofWorldWide Electric Open Drip Proof (ODP) motors are designed and engineered for use in HVAC and refrigeration equipment, air compressors, and general purpose installations where cooler-running, non-enclosed motors are ideal.
What does ODP stand for motor?
Open Drip ProofODP: Open Drip Proof. This type of motor features angled vents which allow air flow around the windings while preventing water from dripping in. While these motors are not as protected against external contaminants, they do fair better with thermal runaway with help from an internal fan.
Can a TENV motor be used outdoors?
TENV motors can be used indoors or outdoors.
Is ip55 motor suitable for outdoor use?
The motors used by Ventinet B.V. as standard have an IP 55 level of protection and offer sufficient protection for outdoor use.
Are all motors waterproof?
The vast majority of electric motors are not waterproof, largely because it is not necessary for the application in which they are used. It is possible to create a waterproof electric motor. However, waterproofing comes with added costs while also limiting overall performance.
Are RC motor waterproof?
The truth is brushless motors are water resistant however they are not really waterproof. Water is never pure in a lake or puddle or even rain. Small particles will find there way in to the bearings on a brushless motor delivered right from the water itself. Over time this is what can destroy the bearings.
Keep Your Motor Dry in Damp Environments | EC&M
Motors in wet and damp places seldom last as long as their dry counterparts. Extending the life of damp-duty motors requires you to do more than what you would to protect dry-duty motors. For example, shield the motor from the direct impact of rain, sleet, and snow, taking care not to restrict airflow to and around the motor. If you put a shelter over the motor, make sure it's open, vented, or ...
Help motors survive wet environments | Machine Design
When electric motors are installed in wet or damp areas, their lives are inevitably shorter than if they lived in a dry climate. However, using a little
Operating Motors in Wet Environments | HPAC Engineering
The use of open drip-proof motors outdoors or in wet areas is not ideal. In the event of a failure, an open drip-proof motor should be replaced with a motor more suitable for an outdoor or wet environment.
What is an open drip motor?
An open drip proof or ODP motor is a type of motor that typically runs cooler and does not overheat. Due to the fact that the chamber has open vents and air can flow directly over the windings, this open drip proof motor tends to be slightly more efficient because the windings are cooler.
Why is a TEFC motor enclosed?
A benefit to having the motor totally enclosed is that it’s protected from the outside environment, including dust, airborne contaminants, and many weather disturbances such as wind-driven rain. A TEFC motor is the recommended choice when your load is in an outdoor or wet location.
Is an ODP idler safe?
NAPCES ODP idler motors are completely safe to use in all indoor industrial settings. On the other hand, a totally enclosed fan cooled, or TEFC motor has a closed off chamber which requires the use of an external fan to blow air over it. A benefit to having the motor totally enclosed is that it’s protected from the outside environment, ...
Does an ODP motor need external cooling?
Although the ODP motor doesn’t require external cooling (our idler motors have an internal fan) the open concept can allow airborne contaminants and dust to enter the chamber. To protect against anything in the environment, North America Phase Converter idler motors all include laminated windings and sealed bearings.
What is 501.125 B?
When motors are in Class I, Division 2 locations, the rules are not as stringent as those found in Division 1 locations, since these areas are not expected to experience explosive atmospheric conditions under normal operating conditions. Section 501.125 (B) covers the rules for motors in these atmospheres. The first type of motor that’s allowed is ...
Why is it important to specify the correct equipment?
When designing electrical equipment in hazardous (classified) locations, it is extremely important to specify the correct equipment due to the gases, dusts, or fibers that may be present in the air.
What is the difference between NEMA and IEC?
The NEMA designations are more descriptive and general, whereas the IEC IP codes are more precise and narrowly defined by a 2-digit code, with the first digit defining how well protected the motor is from solid objects and the second digit describing how well protected the motor is from moisture.
What is the NEMA standard for motor enclosures?
NEMA standards MG1-1.25 through 1.27 define more than 20 types of enclosures under the categories of open machines, totally enclosed machines, and machines with encapsulated or sealed windings.
What is a group E?
Group E: Aluminum, magnesium, and other metal dusts withsimilar characteristics.
What is an ODP motor enclosure?
The 7 most common types of enclosures are: 1. Open Drip Proof (ODP) Premium Efficient Super-E motor with Open Drip Proof (ODP) construction by BALDOR. Allows air to circulate through the windings for cooling, but prevent drops of liquid from falling into motor within a 15 degree angle from vertical. Typically used for indoor applications in ...
What is an explosion proof motor?
The explosion proof motor is a totally enclosed machine and is designed to withstand an explosion of specified gas or vapor inside the motor casing and prevent the ignition outside the motor by sparks, flashing or explosion.
What is a dust tight fan motor?
Dust-tight fan and blower duty motors designed for shaft mounted fans or belt driven fans. The motor must be mounted within the airflow of the fan.
What is ribbed frame?
The ribbed frame is designed to increase the surface area for cooling purposes.
What is the quietest pump?
Pool Pump Motors – One of the quietest motor pump on the market, due to its permanent magnet motor and TEFC design
What is a TEFC motor?
A Totally Enclosed, Fan-Cooled ( TEFC) electric motor is a type of industrial electric motor with an enclosure that does not permit outside air to freely circulate through the interior of the motor.
What is a farm duty motor?
Farm Duty Motors – These high torque and robustly designed motors are a good choice for many farm applications, being totally enclosed and protected from the environment.
What is a general purpose fractional motor?
"General Purpose" Fractional Horse Power Motors - Often made of rolled steel, these are multi-purpose motors suitable for a diverse range of industrial applications, and are usually offered in power ranges from 0.33–2 horsepower (0.25–1.49 kW).
Is a Tefc motor explosion proof?
TEFC motors are not secure against high pressure water nor submersible. They are also not explosion proof without additional modifications.
How to reduce motor susceptibility to failure caused by accumulated moisture?
Heaters. The first and most popular method is the use of heaters installed within the motor. Cartridge or strip heaters are placed within the motor and are turned on during nonoperating periods.
Why should the end housing be rotated?
Thus, the end housing should be rotated so that the louvers will be in the proper position to fend off rain, rather than funneling it inside. When your open-type motor does fail in this wet or damp environment, take this opportunity to replace it with a motor having an enclosure more suitable for the application.
How to keep a motor dry?
Methods to keep motor dry. When a motor runs continuously, the heat generated by it in its normal operation will keep its windings dry. However, infrequent use of the motor may cause wide fluctuations in motor temperature, possibly creating condensation.
What is a TEFC motor?
TEFC motors. A totally enclosed, fan-cooled (TEFC) motor is much more adaptable to outdoor locations and high moisture areas. With a bit of care, you can expect this type of motor to work well and have a long life. However, there are some suggestions that will ensure the expected longevity of this motor.
How to extend the life of a motor?
Shielding. First, the motor should be shielded or sheltered from the direct impact of rain, sleet, snow, hosing-down, etc. But, you have to be careful. You don't want to restrict air flow to and around the motor.
Why are internal heaters interlocked?
When internal heaters are used, they usually are interlocked with the motor starter so that they are energized when the motor is not running and deenergized when it's running. Trickle heating. This second method accomplishes the same result as the first method: Preventing condensation in motors that are at rest.
What causes water to accumulate in a motor?
Another source of water accumulation within a motor is condensation, which can occur with repeated motor heating and cooling cycles. For example, when a motor gets hot, the air within it expands and pushes out. Later, when the motor cools, fresh, moisture-laden air will be drawn in as the air within it contracts.
