Siemens TIASTAR 사용 설명서 - 페이지 10

{카테고리_이름} Siemens TIASTAR에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Siemens TIASTAR 44 페이지. Motor control center

3.2 Operating Environment

The motor control center conforms with the provisions of

NEMA Standard ICS1-108, Altitude Class 2KM which defines

the usual service condition for electromagnetic control. It is

designed for indoor use where the temperature inside the con-

trol center is higher than the ambient temperature. The con-

trol center is capable of carrying its rated load when the ambi-

ent temperature does not exceed 40°C and the altitude does

not exceed 6600 feet above sea level. Where unusual service

conditions exist or where temperature or altitude limitations

are exceeded, the control center construction, ratings, or pro-

tection may require alteration. Some examples of unusual ser-

vice conditions are excessive moisture, vibration, or dust.

Installation shall be in accordance with the National Electrical

Code, ANSI, and NFPA 70 Standards. Unless the motor control

center has been designed for unusual service conditions, it

should not be located where it will be exposed to ambient

temperatures above 40°C (104°F), corrosive or explosive

fumes, dust, vapors, dripping or standing water, abnormal

vibration, shock or tilting, or other unusual operating condi-

tions.

The motor control center should be installed in a clean, dry,

heated place with good ventilation and it should be readily

accessible for scheduled maintenance. A flat, level, concrete

surface should be prepared for the mounting site. If the

mounting site is not flat and level, the motor control center

must be shimmed where necessary to prevent distortion of the

structure.

All conduit entering from the bottom should be in place and

stubbed up about two inches above the finished floor level

before installing the control center. Refer to the MCC lead

sheet plan view located in the information packet for specific

conduit area dimensions.

Note: Conduit should not extend more than 21/2 inches

above the floor surface.

Siemens Energy & Automation, Inc.