Bid Package 08 North Well Field - Garney Construction

Colorado River Municipal Water District
Raw Water Supply Well Sites
Ward County North Well Field
6. CPT Spare Capacity: 100 VA minimum.
7. Bimetallic Overload Relays:
a. Inverse-time-current characteristic.
b. Class 20 tripping characteristic.
c. Heaters in each phase matched to nameplate full-load current of actual
protected motor and with appropriate adjustment for duty cycle.
d. Ambient compensated.
e. Automatic resetting.
8. Solid-State Overload Relay:
a. Switch or dial selectable for motor running overload protection.
b. Sensors in each phase.
c. Class 10/20 selectable tripping characteristic selected to protect motor
against voltage and current unbalance and single phasing.
d. Class II ground-fault protection, with start and run delays to prevent
nuisance trip on starting.
e. Analog communication module.
f. External overload reset push button.
C. Combination Magnetic Controller: Factory-assembled combination of magnetic
controller, overcurrent protective device, and disconnecting means.
1. MCP Disconnecting Means:
a. UL 489, NEMA AB 1, and NEMA AB 3, with interrupting capacity to
comply with available fault currents, instantaneous-only circuit breaker
with front-mounted, field-adjustable, short-circuit trip coordinated with
motor locked-rotor amperes.
b. Lockable Handle: Accepts three padlocks and interlocks with cover in
closed position.
c. Auxiliary contacts "a" and "b" arranged to activate with MCP handle.
d. Current-limiting module to increase controller short-circuit current
(withstand) rating to 65 kA.
2.3 ACCESSORIES
A. General Requirements for Control Circuit and Pilot Devices: NEMA ICS 5; factory
installed in controller enclosure cover unless otherwise indicated.
B. IEC or dual rated NEMA/IEC equipment shall not be acceptable.
C. CONTROL RELAYS: Industrial type; contacts rated for 10 amps at 600 VAC; Square D
Class 8501 Type X, Allen-Bradley Bulletin 700 type PK, or approved equal. Relays shall
have the capability of having contact decks added in the field. Contacts shall be field
convertible to normally open or normally closed. Coils and contacts shall each be
replaceable without replacing any other part of the relay. Where control relays are
indicated on the Plans, industrial control relays shall be furnished whether the relay coil
is operated with 120 VAC or 24 VDC.
D. ELAPSED TIME METER: Yokogawa Type 240, or approved equal. The meter shall be
of the non-reset type for totalizing of hours and operating on 120 or 240 VAC, 60 Hertz.
May 18, 2012
Enclosed Controllers
Revision 0 26 29 13 - 7