GE I-M1010 Manual de instalación descargar pdf (Pagina 7)

GEI M1010-A

4. Zone 2 Hazardous Locations

All motors marked with an IECEx or ATEX designation are suitable for Zone 2 locations. Before the motor is installed in

the hazardous location, the marking must be reviewed for the intended location. If the motor marking does not meet

the intent of the location do not install or operate the motor. Refer to BS/EN 60079-0 and BS/EN 60079-15.

Motor marking for IECEx will have a nameplate with the IECEx logo, IECEx certification number, and IECEx marking

codes. An example of the IEC Ex marking is as follows;

Ex nA IIC T3 Gc

Where symbol:

a. Ex provides assurance of protection per IEC standards.

b. nA indicates non-sparking

c. IIC is a code to indicate the type of explosive gas atmosphere.

d. T3 is a code for the maximum surface temperature.

e. Gc is a code for the motor protection level.

Refer to B/EN 60079-0 and BS/EN 60079-15 for the meaning and understanding of all symbols and codes.

5. Division 1 Explosion-proof motors bearing the Underwriters’ Laboratories label designating the motor’s

Class and Group as defined in the National Electrical Code (NEC) are designed for operation in areas

classified by local authorities as hazardous in accordance with the NEC.

B. Mounting

1. The System Reed Critical frequency should be 25% above or below motor operating speed in order to

avoid excessive vibration.

2. Mount the motor on a firm, level base. For base assembly and motor mounting, the mounting bolts must

be tightened to prevent changes in alignment and possible damage to the equipment. It is

recommended that a washer be used under each nut or bolt head to get a secure hold on the motor

base. As an alternative, flanged nuts or bolts may be used. The recommended tightening torques for

medium carbon steel mounting bolts, SAE Grade 5, are listed below in Table 1. For recommended

tightening torques of other hardware on the motor see tables 4A, and 4B in the Tightening Torque section

of this book.

Table 1

Bolt Size

Recommended Torque

in Ft-Lb (N-M)

Inch

Metric

Minimum

Maximum

1/4

(M6)

(9)

(15)

5/16

(M8)

(19)

(28)

3/8

(M10)

(34)

(50)

1/2

(M12)

(81)

(122)

5/8

(M16)

120

(163)

180

(244)

3/4

(M20)

210

(285)

320

(433)

Note: For low carbon steel bolts, use 50% of the above recommended tightening torques. There are no ID marks on

low carbon steel bolts.

1 2 3 4 5 6 7 8 9 10 11 12 ... 16 17

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GE I-M1010 Manual de instalación Pagina 7

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