What Are The Installation Requirement For Exe Motor

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What is difference between EXD and EXE?

Both products aim to prevent explosions – so which do you need? Exe enclosures, also known as ‘increased safety’ enclosures, are typically the cheaper option, while Exd enclosures offer the additional safeguard of containing any flames.

What is the tE time of an EXE motor?

Time ‘tE’ is the locked rotor withstand time. It is the time taken for heating up any part of the motor from the steady state temperature up to the limiting temperature under the locked rotor condition. This time is determined separately for stator and rotor and the minimum one is taken as the tE.

What is EXD motor?

Ex d – Explosion proof motors (class of temperature T4) Ex de – Explosion proof motors with increased safety terminal box (class of temperature T4)

What is explosion proof motor?

A motor enclosure that withstands and contains an internal explosion. Flame exhaust paths that dampen flames and permit hot gases to escape the enclosure. No surface that exceeds the lowest auto-ignition temperature of the vapor, gas or dust in the anticipated environment.

What is difference between explosion proof and flameproof?

There is no difference except term. Flameproof design is one of the explosion protection technique extensively used for light fittings, JBs, motors in hazardous areas.

What is Exe enclosure?

Increased Safety (Ex e): This method of protection prevents explosions by eliminating any source of ignition. Thus no arcing components are permitted.

What is IA in in motor?

IA/IN ratio is the ratio of starting current to rated current of Ex e motor and it should not be more than 10 [2]. The higher value of tE of rotor and stator indicates good quality of insulation system design.

What does Te mean on motors?

TE – Totally Enclosed A motor enclosure which prevents free exchange of air between the inside and the outside of the enclosure but is not airtight. Different methods of cooling can be used with this enclosure.

What is ex ec?

‘Ex e’ means that an enclosure is constructed and certified as Explosion Protected according to the Increased Safety standard.

What are the types of motor protection?

Motor Instantaneous Over-current Protection. Motor Timed Over-Current Protection. Thermal OverLoad. Motor Ground Fault Protection. Motor Stall Protection. Motor Over-Fluxing Protection.

What is ODP enclosure?

The ODP (open drip proof) is one of the most common types of enclosures. The enclosure is open and vented at the back end of the motor and allows air to circulate in and around the motor windings carrying off heat.

What is motor protection class?

Electric motor IP (ingress protection) classification is a measure of the capacity of the motor to resist ingress of dust and of water.

What are 4 common types of motor enclosures?

Open Drip Proof (ODP). Totally Enclosed Fan Cooled (TEFC). Totally Enclosed Air Over (TEAO). Totally Enclosed Non-Ventilated (TENV). Totally Enclosed Force Ventilated (TEFV)/ Totally Enclosed Blower Cooled (TEBC). Weather Protective 1 (WP1). Weather Protective 2 (WP2).

What is a Class 2 motor?

Class II Group F & G locations are atmospheres containing dust such as (F) Carbon Black, coal or Coke Dust, (G) Flour, Starch or Grain Dusts. 2. As required by Underwriters Laboratories and Canadian Standards Association, explosion-proof motors with Class II Group F & G approvals must have over temperature protection.

What is IP rating for explosion proof?

IP ratings, or otherwise known as the International Protection Marking, are the components of the classification system for the levels of protection against explosive or combustive reactions in electrical enclosures. This system is overseen by the International Electro-technical Commission (IEC).

How can you tell if a motor is flameproof?

All flame proof motors have Licence Mark IS 2148. A DGMS identification mark must be fitted on the motor for Gas Group I or Oil Mines application. Higher than 1000M from mean sea level. Dual output /Dual speed with dahlander connection or separate winding.

What is FLP in electrical?

FLP / WP Tube Light Flameproof Fittings.

How does is explosion protection technique work?

The equipment is protected by using a liquid (or oil) in which the electrical equipment or parts of the electrical equipment are immersed so that an explosive gas atmosphere which may be above the liquid or outside the enclosure cannot access the electrical source of energy and be ignited.

What means intrinsically safe?

The standard ensures that an “intrinsically safe device” is incapable of triggering combustion or igniting any gasses or fuels. To put it simply, you can use it around gasses or fuels without risking static electricity or heat discharge from the device igniting the surrounding volatile gasses, powders and liquids.

What is temperature class T1 to T6?

A T Class rating of T1 means the maximum surface temperature generated by the instrument at 40° C is 450° C. A rating of T6 means the maximum surface temperature generated by the equipment is 85° C.

What is service factor of motor?

Motor Service Factor (SF) is the percentage of overloading the motor can handle for short periods when operating normally within the correct voltage tolerances.

What is a 3 phase motor?

A three-phase motor is an electric machine that transforms electric power into mechanical energy by means of electromagnetic interactions.

What is full load?

Full-load (FTL) means when transport company delivers truck to the shipper, which completely fills the truck in one direction. When the truck is loaded, the cargo is transported directly to the specified location.

What does Code K mean on a motor?

Standard 3 phase motors often have these locked rotor codes: less than 1 hp: Locked Rotor Code L, 9.0 – 9.99 kVA. 1 1/2 to 2 hp: Locked Rotor Code L or M, 9.0 – 11.19 kVA. 3 hp : Locked Rotor Code K, 8.0 – 8.99 kVA. 5 hp : Locked Rotor Code J, 7.1 – 7.99 kVA.

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