SECTION 16475 LOW VOLTAGE OVERCURRENT PROTECTIVE DEVICES

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


SECTION 16475

LOW VOLTAGE OVERCURRENT PROTECTIVE DEVICES



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 overcurrent devices of the sizes and interrupting ratings as indicated on the drawings and as specified herein.

1.3 SUBMITTALS

A. Shop Drawings
1. Device dimensions, nameplate nomenclature and electrical ratings.
2. Product data sheets with installation instructions.
3. Time current characteristic curves for each size and type of device.


PART 2 PRODUCTS

2.1 ACCEPTABLE MANUFACTURERS

A. Fuses.
1. Bussmann
2. Chase Shawmut

B. Molded case circuit breakers.
1. Square D
2. Westinghouse/Cutler-Hammer/Eaton Co.
3. Siemens
4. General Electric

2.2 250 VOLT FUSE TYPES

A. Class RK-1, one end rejection or to fit mountings specified.  0-600 ampere, 200,000 ampere interrupting rating. Equivalent to Bussmann Low-Peak.  LPN-R, dual element, time delay with short circuit protection for motor, transformer, welder, feeder and main service protection.

2.3 600 VOLT FUSE TYPES

A. Class RK-1, one-end rejection or to fit mountings specified, 0-600 ampere, 200,000 ampere interrupting rating. Equivalent to Bussmann Low-Peak.  LPS-R, dual element,

time delay with short circuit protection for motor, transformer, welder, feeder and main service protection.

B. Class L, bolt-in, 601-6,000 amperes, 200,000 ampere interrupting rating.  Equivalent to Bussmann HI-CAP.  KRP-C, time delay for overload and short circuit protection for motor, transformer, feeder and main service protection.

C. Class CC, fast acting, single element, 0-30 amperes, 200,000 ampere interrupting rating. Equivalent to Bussmann Limitron KTK-R standard non-rejection, UL listed for motor control circuits, lighting ballasts, control transformers and street lighting fixtures.

2.4 SPARE FUSES

A. Provide 100% spare (minimum of three) of each type and rating of installed fuses.

2.5 LIGHTING PANEL CIRCUIT BREAKERS

A. Thermal and magnetic protection.

B. Single-handle common trip, two and three poles (handle ties not acceptable).

C. Bolt-on type.

D. Quick make and break toggle action.

E. Handle trip indication.

F. Handle position indication, ON in up position, OFF in down position, and TRIPPED centered.

G. UL listed for type and temperature rating of wire specified.

H. UL listed short circuit rating (integrated equipment rating):
1. Up to 240V: 10,000 RMS symmetrical amperes minimum.
2. Up to 480V: 14,000 RMS symmetrical amperes minimum.

I. UL SWDL switching duty on 120V circuits where loads are panel switched.

2.6 POWER PANEL AND MOTOR CONTROL CENTER CIRCUIT BREAKERS

A. Thermal and magnetic protection.

B. Magnetic protection only, in combination with motor starters and motor circuit protectors (MCP).

C. Single magnetic trip adjustment.

D. Single-handle common trip, two and three poles (handle ties not acceptable)

E. Push-to-trip test button.

F. Breakers shall plug on to panel bussing but breaker cases shall be bolted to panel housing.

G. Quick make and break toggle action.

H. Handle trip indication.

I. Handle position indication, ON in up position, OFF in down position, and TRIPPED center.

J. UL listed for type and temperature rating of wire specified.

2.7 CURRENT LIMITING CIRCUIT BREAKERS

A. One current limiter per pole.

B. Blown current limiter to trip all poles.

C. UL Listed Short Circuit Rating: 100,000 RMS symmetrical amperes.

D. Other features as specified above.


PART 3 EXECUTION

3.1 INSPECTION

A. Examine fusible equipment for size and type of fuse to ensure selective coordination.

B. Install fuses only after selective coordination has been made.

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 industry practices.

B. All overcurrent protection devices by same manufacturer.

C. Circuit breakers shall be factory installed in enclosures.

D. Fuses shall not be installed until equipment is ready to be energized.

3.3 ADJUSTMENT

A. Adjustable settings on circuit breakers shall be set to provide selective coordination, proper operation and compliance with NEC.

3.4 FIELD QUALITY CONTROL

A. Test and/or permanently record the following:

B.
Fuses


1.
Equipment nameplate requirement

2.
Actual fuse rating

C. Circuit Breakers
1. Nameplate data
2. Actual trip setting



END OF SECTION