SECTION 16950
CONTROL PANELS
PART 1. 1.01
GENERAL
SUMMARY
A. Section Includes:
1. Control Panels as shown on the Drawings, or as specified in Division 16. Control
Panels described herein apply to the RTU Panel, and all such enclosures as part of
the project.
2. RTU Panel complete with equipment noted on Drawings. Provide space as shown
for future Owner provided and installed SCADA equipment (NIC). RTU Panel
dimensions provided on Drawings are estimates and final RTU Panel dimensions
shall be provided by Control System Integrator based on layout of all equipment
and required clearances, wireways, terminal block with spacing for wire labels,
batteries, etc.
B. Related sections include but are not necessarily limited to:
1. Section 16010, “General Electrical Requirements”
2. Section 16080, “Modifications to Electrical Equipment”
3. Section 16970, “Flow Measurement”
1.02
REFERENCES
A. National Electrical Manufacturers Association (NEMA) Publications
B. Underwriters Laboratories (UL) Publication
1.03
SUBMITTALS
A. Shop Drawings to be submitted in this Section shall be made in one package.
B. Shop Drawings: Submit shop drawings for RTU Panel, including details for the
following items:
1. Power wiring schematics and interconnects.
2. Signal wiring schematics and interconnects.
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3. Elementary control diagrams.
4. Fabrication drawings, including a dimensioned outline drawing to scale, show
space for conduits, etc. Include anchoring details.
5. Bill of materials for each control panel or modifications of existing electrical
equipment.
6. Manufacturer’s catalog cut sheets for all equipment, control devices, terminals,
fuses, relays, etc.
7. Panel layouts including nameplate inscriptions with reference back to Bill of
Materials.
8. Connections to external equipment.
9. Wire marking scheme.
C. Spare Parts List: Include a spare parts list showing recommended parts and quantities
as well as complete ordering information for replacement components.
D. Manuals: Provide operation and maintenance manuals per specification 16010.
1.04
PRODUCT DELIVERY AND HANDLING
A. Ship assembled control panels in sections that facilitate handling and field
installation.
PART 2. 2.01
PRODUCTS
CONTROL PANEL CONSTRUCTION
A. General:
1. Provide control panels as shown on the Drawings. Panels shall conform to the
requirements of NEMA Standards ICS 1 (General Requirements for Industrial
Control and Systems) and ICS 6 (Enclosures for Industrial Control and Systems).
Provide sufficient access to the panels.
2. Panels covered under this specification are:
a. RTU Panels that contains new power supply, new batteries, new control
relays, new control devices, new terminal blocks, flow transmitter and
interconnecting wiring. Final product shall be a complete and operable system,
all housed in a new NEMA 12 free standing enclosure sized as needed.
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Minimum size shall be 60”x36”x24”D for bid purposes only. Control System
Integrator shall size panel as needed.
B. Safety Requirements: The electrical supply to each control panel shall be arranged to
be disconnected by a switch or circuit breaker, except for necessary foreign circuits.
Any live parts within the control panel fed from foreign control or signal circuits shall
be covered or arranged to be disconnected by one of the following methods:
1. Enclosed relays that are automatically de-energized when the main disconnecting
switch is opened.
2. Door-operated enclosed disconnect switches.
3. Clearly identified enclosed manually operated disconnect switches, which may be
located inside the control panel door, provided the operating handles are isolated
or barriered from all open live parts. Each control panel shall be arranged so that
adjustments to timing relays or replacement fuses can be done without exposure to
life parts.
C. Wiring:
1. Factory wire control panels. Cable all panel wiring by securing to the panel
surfaces with plastic cable ties. Permanently identify each wire at each termination
by means of a heatshrink numbered sleeve. Number all electrically common wires
the same, and number each electrically different wire uniquely. Provide red wire
color for ac wiring, with white neutral and green ground. Provide blue wiring for
dc wiring. Wiring shall be 14-guage, Type MTW or THHN, 600 volt, stranded
copper wire. Where wiring crosses hinged surfaces, provide an 18-inch “U”
shaped hinge loop of extra flexible wires secured at both ends. Provide ring-type
lugs for all panel wiring; spade-type lugs are not acceptable. Use ratchet type
crimping tools that do not release until proper crimp pressure has been applied.
D. Nameplates:
1. Provide nameplates on panels and components, and as specified in Section 16010.
A “CAUTION” nameplate shall be attached to the outside of access doors
warning of foreign voltages inside the panel (see “Safety Requirements”).
E. Finish:
1. All metal surfaces shall be given a rust-inhibiting treatment, then one coat of
synthetic primer, followed by two coats of synthetic enamel. The average overall
finish shall be at least 3 mils in thickness. All damage to the finish during
installation shall be touched up at the jobsite and approved. Does not apply to
stainless steel panels.
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F. Size and Supports:
1. Panels shall be of sufficient size to adequately enclose all instruments.
2. Provide rigid supports for all devices. Supports shall not cause warping or bowing
sides of mounting plates.
G. Mounting:
1. Attachment methods shall be detailed on panel drawing submittals.
H. Ventilation:
1. Ventilation shall be provided to prevent internal panel temperatures from
exceeding 110° F.
2. Louvers shall be provided, when required for cooling, near the bottoms and tops
of the doors and side of panels. 80-mesh screens shall cover the insides of the
louvers.
I. Signal Ground Buses:
1. Provide each panel with at least on isolated signal ground bus.
2. Connect all signal shield grounds within the panel to the ground bus.
J. Panel Lights: RTU Panel shall be internally lighted by fluorescent lamps, provided
with guards and a toggle switch located convenient to each access door. The light
shall be wired to outgoing terminal blocks for 120 volt, 60 Hertz, single phase supply.
2.02
CONTROL PANEL COMPONENTS
A. Control Relays
1. Control Relays shall have indicating lights and push to test button options.
Provide relays manufactured by IDEC Model RH3B-ULC, AC120V, and socket
model SH3B, or approved equal.
B. Terminal Blocks:
1. Terminal blocks shall be furnished and installed as required for fan-out of control,
power, and instrumentation wiring in equipment. The blocks shall be rated 600V
at a minimum of 20 amperes or sized for the conductors served. Provide terminal
blocks with follower plates which compress the wires and have wire guide tangs
for ease of maintenance. Terminal blocks which compress the wires with direct
screw compression are unacceptable. All power, control and instrument wires
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shall terminate on terminal blocks with wire numbers on terminals and on both
ends of the wires.
2. Terminal blocks shall be snap-in type for mounting on DIN rails. End clamps and
cover plates shall be provided to hold terminal blocks securely in place.
3. Each strip of terminal blocks shall have a unique identifying alphanumeric
nameplate at one end. Plastic marking strip segments shall be provided to label
terminal blocks. Each marking strip segment length shall provide labeling for no
more than four terminals at one time. Numbers on this marking strip shall be
machine printed and 1/8 inch high.
4. Terminal blocks shall be physically separated into groups by the level of signal
and voltage served. Power and control wiring above 100 volts shall have a
separate group of terminal blocks from terminal blocks for wiring below 100
volts.
5. Provide a ground terminal or connection point for the power system grounding
conductor.
6. Terminal blocks shall be Phoenix Type UK or approved equal.
C. Space Heaters shall be 40-100 Watt as required by panel size and installed
environment, 120 volt, resistance metal bar type with perforated protective metal
barrier. Space heaters shall be thermostatically controlled. Provide Chromalox OT815 space heater and Dayton 2E206 thermostat, or approved equal.
D. Pushbuttons and Selector Switches: Provide NEMA Type 4/13 for indoor and exterior
areas with NEMA A300 rated contacts. Pushbuttons shall be standard size, (30.5 mm
mounting hole) round, flush head with momentary contacts. Selector switches shall be
standard size, (30.5 mm mounting hole) round with standard operator, black color.
Provide Allen Bradley 800H or approved equal.
E. Pilot Lights: Provide transformer type, (30.5 mm mounting hole) NEMA Type 4/13
for interior and exterior areas, complete with color of lens indicated on Drawings and
legend plate. Lamps shall be high-density light emitting diodes. Pilot lights shall be
push-to-test type. Provide Allen Bradley 800H or approved equal.
F. Power Supply: Provide 24 VDC linear type power supply required to provide DC
voltage needed by level sensors (and telemetry equipment if needed), from 120 VAC,
60 Hz power source. Provide Technology Dynamics Model TCP-24-17-LVBD, or
approved equal.
G. Surge Protection Device:
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1. Power Line Transient Surge Protector: Provide equipment meeting the following
specifications:
a. Response Time: 5 nanoseconds maximum.
b. Surge Current Test (ANSI C62.41): Category B, 3K
c. Maximum Let Through Voltage (3KA per ANSI C62.41): 340 Volts
d. Operating Voltage: 120 VAC, 60 Hz
e. Operating Current: 15 Amp Service
f. Connections: Brass Studs
g. Indicator: Neon failure indicator
h. Manufacturer’s Reference: Entrelec 025 004.14
H. Circuit Breakers: Feeder circuit breakers shall be molded-case type. Provide quickmake and quick break toggle mechanism, inverse-time trip characteristics and tripfree operation on overload or short circuit. Indicate tripping by a handle position
between the manual OFF and ON position. Provide trip ratings and number of poles
as indicated on the drawings.
2.03
CONTROL PANELS
A. Control Panels shall be rated for area installed, refer to Specification 16010. Provide
Panel with hinged doors. Provide quick disconnect latches. Panels shall have back
panel. Provide nameplate on all Control Panels.
B. Provide a copy of as-built control and logic diagrams, panel layout, and wiring
diagrams within the control panel, enclosed in plastic and mounted inside the panel.
C. Manufacturers of the Control Panels shall be Hoffman Engineering Company, or
approved equal.
PART 3. 3.01
EXECUTION
INSTALLATION
A. Installation, testing, calibration, validation, startup and instruction shall be in
accordance with Section 16030.
B. Install each Control Panel level and plumb, and secure by the favorably review
seismic mounting method. Doors shall swing freely and close tightly.
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C. Carefully repair any damage to the structure, components or finish to the satisfaction
of the Engineer. Clean all nameplates.
D. Exercise care at all times after installation of Control Panels to keep out foreign
matter, dust, dirt, debris or moisture. Use protective sheet metal covers, canvas, heat
lamps, etc., as needed to ensure equipment protection
E. Terminals:
1. All power, control, and instrument wires entering and leaving a compartment shall
terminate on terminal blocks with wire numbers on terminals and on both ends of
the wires.
2. Numbers shall be assigned to all blocks except grounding blocks. Fuse blocks
shall be assigned unique designations such as FU1, FU2. No two fuses shall be
assigned the same designation. Fuse blocks shall be provided with nameplates
showing the designation and identifying the current rating of the fuse.
3. Each terminal block shall have a unique identifying alphanumeric designation at
one end (i.e.: TB1, TB2, etc.). On each terminal strip, terminal numbers shall be
assigned starting with #1 at one end, incrementing in numerical sequence (1, 2, 3,
4, …). Plastic marking strip segments shall be provided to label terminal blocks.
Each marking strip segment length shall provide labeling for no more than four
terminals at one time. These marking strips shall have a unique number/letter for
each terminal, which is identical to the “elementary” and “loop” diagram wire
designation. Numbers on the marking strip shall be machine printed and 1/8 inch
high minimum.
4. Terminal block shall be physically separated into groups by the level of signal and
voltage served. Power and control wiring above 100 volts shall have a separate
group of terminal blocks from terminal blocks for wiring below 100 volts,
intermixing of these two types of wiring on the same group of terminal blocks is
not allowed.
**END OF SECTION**
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