Leeson Product Catalog 1050

First page Previous page 467 Next page Last page

Technical Information

IEC Motors DC Motors Gearmotors AC / DC Controls Accessories / Kits Mods / Factory Options X-Ref / Index Tech Information Terms / Warnings

NEMA SERVICE FACTORS

METRIC (IEC) DESIGNATIONS The International Electrotechnical Commission (IEC) is a European-based organization that publishes and promotes worldwide mechanical and electrical standards for motors, among other things. In simple terms, it can be said that IEC is the international counterpart to the National Electrical Manufacturers Associa- tion (NEMA), which publishes the motor standards used in the United States. Like NEMA, IEC has designations indicating the protection provided by a motor’s enclosure. However, where NEMA designations are word descriptive, such as Open Drip-Proof or Totally Enclosed Fan Cooled. IEC uses a two-digit Index of Protection (IP) designation. The first digit indicates how well-protected the motor is against the entry of solid objects, the second digit refers to water entry. By way of general comparison, an IP22 motor relates to Open Drip-Proof, IP54 to totally enclosed. IEC standards are expressed in metric units. IEC ENCLOSURE PROTECTION INDEXES

RPM 1800 1.35 1.25 1.15 1.00

ENCLOSURE

3600 1.35 1.25 1.15 1.00

1200 1.35 1.25 1.15 1.00

1/4-1/3 1/2-3/4

Open Open Open

1 & Larger

All

Totally Enclosed

SCR PM DC MOTORS ON PWM POWER SUPPLIES Pulse width modulated DC controls have a voltage output similar to pure direct current which has a form factor of 1.00. SCR thyristor drives, such as the SPEEDMASTER ® controls listed on page 117, have a form factor of 1.4. LEESON stock SCR rated motors can also be used with PWM controls. In fact, the motor’s HP rating can be increased because of less heating in the motor. In addition, the motor will operate quieter and the brush life will be extended. Most LEESON Totally Enclosed Motors have 1.15 Service Factor. Refer to the Service Factor information on each page to identify specific totally enclosed motors with NEMA 1.00 Service Factor or LEESON 1.15 Service Factor. All drip-proof motors have NEMA Service Factors of 1.15 or higher. All three phase totally enclosed motors have NEMA Service Factors of 1.15 except when noted ( ® ).

Protection Against Solid Objects

Protection Against

Liquids

Number

Definition

Number

Definition

0 No protection

1 Protected against solid

1 Protected against water

objects of over 50 mm

vertically dripping

(e.g. accidental hand contact)

(condensation)

2 Protected against solid

2 Protected against water

Rated HP 1.40 FF

Rated RPM 1750 1750 1750 1750 1750 2500 2500 1750 1750 1750 1750 1750 1750 2500 2500 2500 2500 1750 1750 1750 1750 1750 1750 2500 2500 1750 1750 1750 1750 2500 1750 1750 1750 1750 2500 1750 1750 2500 1750

Rated Volts

Catalog Number 098002 098003 098004 108424 098005 098006 098007 098000 108014 108226 098008 108015 108227 098009 108016 098010 108017 098032 108018 108228 098069 108019 108229 108020 108021 108022 108230 108023 108231 108265 108092 108262 108232 128000 108266 128001 128010 128008 108502

Rated HP 1.05 FF

objects of over 12 mm

dripping up to 15° from

(e.g. finger)

the vertical

1/4

0.40 0.50 0.50 0.56 0.50 0.75 0.70 0.70 0.75 0.75 0.56 0.70 0.70 1.00 1.00 1.00 0.86 1.00 1.00 1.25 1.00 1.00 1.25 1.50 1.50 1.25 1.25 1.25 1.25 2.00 1.75 1.75 1.75 3.00 --

180

3 Protected against solid

3 Protected against rain

1/3

90 90

objects of over 2.5 mm

falling at up to 60° from

(e.g. tools, wire)

the vertical

180

4 Protected against solid

4 Protected against water

1/2

objects of over 1 mm

splashes from all

180

(e.g. thin wire)

directions

90 90 90

5 Protected against dust

5 Protected against jets of water from all directions 6 Protected against jets of water comparable to heavy seas 7 Protected against the effects of immersion to depths of between 0.15 and 1m 8 Protected against the

180 180 180

6 Totally protected

3/4

90 90

against dust.

180 180

90 90 90

180 180 180

effects of prolonged immersion at depth

180

90 90

IEC DESIGN TYPES The electrical performance characteristics of IEC Design N motors in general mirror those of NEMA Design B—the most common type of motor for industrial applications. By the same token, the characteristics of IEC Design H are nearly identical to those of NEMA Design C. There is no specific IEC equivalent to NEMA Design D. MOTOR EFFICIENCY TEST METHODS Performance data of single phase motors is determined by using I.E.E.E. Std. 114 (Method B), three phase motors by I.E.E.E. Std. 112 (Method B). Motor efficiency is calculated using CSA C390. These testing methods meet the requirements of EPAct of 1992 and most utility companies. For complete performance data on all LEESON motors, please review the Find-A- Product section on www.leeson.com .

180 180 180 180 180 180 180 180 180 180 180 180

1 1 / 2

-- -- --

467

Made with FlippingBook