16421 - Motor Starters
|Section Cover Page |
| Section 16421 |
|2000-06-01 Motor Starters |
This Master Specification Section contains:
.1 This Cover Sheet
.2 Specification Section Text:
1. General
1.1 Related Requirements
1.2 Related Work Specified In Other Sections
1.3 Reference Standards
2. Products
2.1 Three Phase Motor Protection Switches
2.2 Combination Starters
3. Execution
3.1 Installation
1. General
1.1 RELATED REQUIREMENTS
.1 ELECTRICAL GENERAL REQUIREMENTS: SECTION 16010.
1.2 RELATED WORK SPECIFIED IN OTHER SECTIONS
.1 MOTOR CONTROL CENTRES: SECTION 16422.
1.3 REFERENCE STANDARDS
.1 PROVIDE MOTOR PROTECTION SWITCHES OF THE CEMA SIZE LISTED. MAXIMUM RATING OF UNITS NOT USING CEMA RATING TO BE EQUIVALENT TO CEMA SIZE INDICATED.
2. Products
2.1 THREE PHASE MOTOR PROTECTION SWITCHES
.1 ACROSS-THE-LINE MAGNETIC MOTOR PROTECTION SWITCHES WITH THREE OVERLOAD RELAYS, COMPLETE WITH 120 V OPERATING COIL, [ ]/120 V CONTROL TRANSFORMER OF SUFFICIENT VA TO HANDLE THE STARTER COIL, CONTROLS, AND INTEGRAL PILOT LIGHT.
2.2 COMBINATION STARTERS
.1 [FUSIBLE 3 POLE LOAD BREAK DISCONNECT STYLE COMPLETE WITH TIME DELAY HRC FUSES] [MOLDED CASE AIR CIRCUIT BREAKER STYLE] COMPLETE WITH ROTARY TYPE SWITCH WITH OPERATING HANDLE AND LOCK-OFF FACILITY. OPENING STARTER ENCLOSER RESTRICTED BY THE USE OF A DEFEATER SCREW, UNLESS SWITCH IS IN THE "OFF" POSITION.
.2 Each combination magnetic motor protection switch installed in unit motor control centre to house the following facilities:
1. [Fused disconnect switch complete with time delay HRC fuses.] [Moulded case automatic air circuit breaker.
2. Contactor with three overload relays.
3. 120 V holding coil.
4. Pilot light in cover (resistor, transformer, or neon type).
5. Reset button, HOA switch in cover, field convertible to Off/Auto or Start/Stop push button as indicated.
6. Two sets of normally open auxiliary contacts in addition to the standard auxiliary holding contacts supplied with each contactor. One set of auxiliary contacts convertible to normally closed.
7. Control transformer primary and secondary fusing - primary fusing to be HRC type.
8. Control transformer [ ]/120 V of sufficient VA to operating coil and associated controls.
3. Execution
3.1 INSTALLATION
.1 IN FINISHED AREA, PROVIDE FLUSH MOUNTED MOTOR PROTECTION SWITCHES COMPLETE WITH STAINLESS STEEL COVERPLATES.
.2 Select overload device trip setting for combination starters to suit the motors. Select heaters to suit full load current of motors.
END OF SECTION
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