SECTION 16481 MOTOR STARTERS

This spec was part of the Des Plaines, IL River WRF project that bid Feb 26, 2015.


SECTION 16481 MOTOR STARTERS


PART 1 GENERAL

1.1 RELATED REQUIREMENTS

A. Applicable requirements of Division 0 and Division 1 shall govern work in this Section.

1.2 SCOPE

A. Provide and install motor starters of the types as indicated on the drawings and as specified herein

1.3 SUBMITTALS

A. Shop Drawings

B. Showing enclosure dimensions, nameplate nomenclature, electrical ratings and thermal unit schedule.

C. Product data sheets with printed installation instructions.

D. Wiring diagrams and schematics.

E. Identify with tag number for proposed use.

F. Operating and Maintenance Data

G. Manufacturer's printed instructions for replacing parts, performing cleaning and operating and maintaining motor starters.

H. Repair parts list.

I. Field quality control test results.

1.4 PRODUCT DELIVERY, STORAGE AND HANDLING

A. Do not store motor starters exposed to weather.

B. Protect motor starters against damage from work of other trades.

PART 2 PRODUCTS

2.1 GENERAL

A. Use of a manufacturer's name and model or catalog number is for purpose of establishing standard of quality and general configuration desired only.

B. Starters shall be by one manufacturer.

2.2 ACCEPTABLE MANUFACTURERS

A. Allen Bradley

B. Cutler-Hammer/Westinghouse/Eaton

C. Square D

D. General Electric

E. Siemens

2.3 MANUAL MOTOR STARTER CONSTRUCTION

A. Quick-make and break toggle action.

B. Double-break silver alloy contacts.

C. One-piece bi-metallic or melting alloy type thermal overload units.

D. Starter inoperative, unless thermal unit is in position.

E. Provision for padlocking in the "off" position.

F. Green pilot light to indicate when motor is running.

G. NEMA standards for size and horsepower rating.

H. Provisions for resetting starter after overloads trip the starter.

2.4 MAGNETIC COMBINATION TYPE MOTOR STARTER CONSTRUCTION

A. Built-in circuit breaker type disconnect switch with external disconnect handle with capability to padlock in the open position. Size circuit breaker as indicated on the drawings.

B. Mounted in vertical position.

C. Double-break silver alloy contacts.

D. Molded coil through Size 6.

E. Wound, taped, varnished and baked coils Sizes 7 and 8.

F. Contacts and coil replaceable without removing starter from enclosure or power wiring from starter

G. Straight-through wiring.

H. Overload Relay - General Application

I. One-piece thermal unit construction.

J. One bi-metallic or melting alloy type overload relay per phase, manually reset.
1. Interchangeable thermal units.
2. Thermal units must be in place to operate starter.
3. Replaceable overload relay circuit contacts.
4. Trip at 6 times FLA in 20 seconds.

K. Overload Relay - Submersible Pumps and Hermetically Sealed Motors
1. One-piece thermal unit construction.

L. One bi-metallic or melting alloy type overload relay per phase, manually reset.
1. Interchangeable thermal units.
2. Thermal units must be in place to operate starter.
3. Replaceable overload relay circuit contacts.
4. Trip at 6 times LRA in 3-5 seconds.

M. NEMA standards for size and horsepower ratings.

NEMA Size Max HP @ 208V Max HP @ 480V

1 7½ 10
2 10 25
3 25 50
4 40 100
5 75 200
6 150 400

N. NEMA Size 1 minimum, or as noted on drawings.

O. Control Circuits
1. Provide a control transformer mounted in starter enclosure. Verify the control voltage required with the temperature control contractor.
2. Two fuses on control transformer primary side and single fuse on secondary line.
3. One secondary line grounded.
4. Transformer sized for device, accessories connected there to and 25% extra capacity minimum.

P. Accessories
1. Reset button mounted in enclosure cover.

2. Heavy duty, oil-tight, green "running", and red "off" lights mounted in enclosure cover.
3. Heavy duty, oil-tight, Hand-Off-Auto selector switch mounted in enclosure cover.
4. Furnish two normally open and one normally closed auxiliary contacts in each starter.
5. Make provisions for mounting in a motor control center where indicated on the drawings.

2.5 SOLID-STATE TYPE MOTOR STARTERS (SOFT-STARTERS)

A. The solid-state reduced voltage starter shall be UL listed and consist of a SCR based power section, and a logic board.

B. Resistor/capacitor snubber networks shall be used to prevent false firing of SCRs due to dv/dt effects.

C. The logic board shall be conformally coated to protect against environmental concerns.

D. A paralleling bypass contactor shall be provided for use with each solid-state starter and shall energize when the motor reaches full speed.

E. The contactor shall be fully rated for across-the-line starting duty should this be desired.

F. The overload protection shall be electronic and be based on an inverse time-current algorithm.  Units using bimetal overload relays are not acceptable.

G. Unit shall include heat sink overtemperature protection.

H. The solid-state logic shall be phase sensitive, and shall inhibit starting on incorrect rotation.

I. Unit shall protect against a phase loss/unbalance condition shutting down if a 35% current differential between any two phases is encountered.

J. Assembly shall include a normally open (NO) contact to annunciate fault conditions.  In addition, an LED display shall indicate type of fault (current trip, phase loss, phase rotation).

K. Logic board shall include adjustability of the following: ramp time (1 - 45 seconds), initial torque (100 - 200% current), and current limit (100 - 500% current).

L. Enclosed units shall include a thermal magnetic circuit breaker or HMCP for short-circuit protection and quick disconnect means.

M. Starters and breakers/HMCPs are to be rated per UL 508D for a withstand rating of 65 kAIC RMS.

N. Maximum continuous operation shall be at 115% of continuous ampere rating.

O. Provide Cutler-Hammer Series S-801 or approved equal.

2.6 ENCLOSURES

A. Indoor dry
1. MANUAL STARTERS: General purpose flush mounted in finished areas or NEMA 1 surface mounted in unfinished areas.
2. MAGNETIC STARTERS: NEMA 1 surface mounted.
3. SOLID STATE STARTERS: NEMA 1 surface mounted.

B. Indoor damp or below grade
1. NEMA 3R.

C. Outdoor or indoor wet
1. NEMA 4.

D. Corrosive Area
1. NEMA 4X stainless steel.

2.7 NAMEPLATES

A. Engraved laminated plastic.

B. Letters 1/2 in. high.

C. Black letters on white background.


PART 3 EXECUTION

3.1 INSPECTION

A. Examine area to receive motor starter to assure adequate clearance for motor starter installation.

B. Start work only after unsatisfactory conditions have been corrected.

3.2 INSTALLATION

A. Install in accordance with manufacturer's written instructions, applicable requirements of NEC and NECA's "Standard of Installation," and in accordance with recognized practices.

B. Install in MCC or mounted firmly to wall of structural surface. Refer to plumbing plans and heating, ventilating and air conditioning plans for starter locations.

3.3 FIELD QUALITY CONTROL

A. Megger check of phase-to-phase and phase-to-ground insulation levels.  Do not megger check solid state equipment.

B. Test for continuity between line and load terminals and between control terminals.

C. Short circuit.

D. Operational check.

E. Test each motor and permanently record following information:
1. Motor identification as to the load served.
2. Nameplate data.
3. Overload relay equipment.
4. Protective relay (if any) setting.
5. Voltage and current phase readings.
6. Direction of rotation.
7. Furnish spare overloads in each size utilized and turn over to owner.
8. Provide a spare control transformer for each starter size utilized and turn over to owner.

3.4 ADJUSTMENT AND CLEANING

A. Adjust covers and operating mechanisms for free mechanical movement.

B. Tighten wire and cable connections.

C. Verify over current protection thermal unit size with motor nameplate to provide proper operation and compliance with NEC.

D. Clean interior of enclosure.

E. Touch up scratched or marred surfaces to match original finish.



END OF SECTION