DIVISION 16 - ELECTRICAL
SECTION 16700-1 of 3
REMOTE MONITORING SYSTEM
16700.01 GENERAL
A.
Description
This section includes the requirements for furnishing and installing the necessary wiring and
enclosure to accommodate the Remote Monitoring System.
B.
Operation
The Remote Monitoring System is an alarm monitoring system using an existing computer
located in the Utility Water Operations Building, Millersville, Maryland, which
automatically interrogates alarm condition sensors at each remote wastewater site. A
remote terminal unit (by others) will be connected to the various alarm sensors (float
switches, pressure switches, relays, etc.) so that a signal is transmitted to the computer for
each alarm condition when the circuit is completed. The computer receives these signals
via the central station receiver, and after interpreting them, types out on the typewriter alarm
and status log an appropriate message indicating the condition at the pump station site.
16700.02 PRODUCTS
A.
Sensors
1.
Dry Well Flood Float Switch
Float switch shall be "Roto-Float" Model P (normally closed) as manufactured by
Anchor Scientific Company.
2.
High Wetwell Level Float Switch
Float switch shall be Model 9G-NCG (normally closed) as manufactured by
Consolidated Electric Company.
3.
RTU Test Pushbutton
Pushbutton shall be Class 9001, Type SKR1UH6 (yellow insert) normally open
contacts 9001KA2-G as manufactured by Square-D Company, or approved equal.
4.
Power Transfer Contact
Contact shall be an auxiliary contact on the automatic transfer switch, shaft
mounted or shaft actuated, closed in "normal" position.
5.
Three Phase Power Monitor
Power monitor shall be Model PBD-480-ALE (for 480 volts) or a Model PBD230-ALE (for 240 volts) as manufactured by Diversified Electronics, Inc.
Published: 01/01
Revised:
DIVISION 16 - ELECTRICAL
SECTION 16700-2 of 3
REMOTE MONITORING SYSTEM
Monitor shall be protected by three KTKR-1 fuses in a rejection type fuse holder.
Contact closed when power is present.
6.
Alternate Source Power Monitor
At stations with two Baltimore Gas & Electric services or a normally energized
emergency feeder from another pumping station a three-phase power monitor
shall be provided as specified in .02 A. 5. of the Section. If the automatic transfer
switch has a three-phase monitor on the emergency source, a dry contact on this
monitor can be used vs. providing an additional monitor.
7.
Wetwell Control Contact
Contact shall be a dry contact (normally open) on the control transfer relay.
8.
Entry Switch
Switch shall be Model ZCK-L1 base, Model ZCK-D08 head as manufactured by
Telemecaniqe or approved equal. Switch shall be mounted on dry well hatch and
all building doors. Contact closed when hatch/door closed.
9.
Personnel Pushbutton
Maintained contact, corrosion resistant pushbutton with red mushroom head in
non-metallic enclosure. Pushbutton shall be type 800T-FXJ6D4 as manufactured
by Allen-Bradley or approved equal. Enclosure shall be type 800H-1HZ4R as
manufactured by Allen-Bradley or approved equal. Contact closed when
pushbutton is pulled out.
10.
Generator Failure Contact
Contact in generator control panel activated by low oil pressure, high water
temperature, overspeed or overcrank. Contact closed when above sensors are
normal.
B.
Special Control Panels
1.
Control panels supplied by Mechanical/Specialty Equipment Manufacturers shall
conform to the requirements of this subsection and applicable requirements of
Section 16100 (Relays, Pilot Devices, etc.).
2.
Exterior enclosures and interior enclosures in corrosive, wet, or damp
environments shall be NEMA 4X stainless steel or NEMA 4X non-metallic.
Interior enclosures in dry, non-corrosive environments shall be NEMA 12 steel or
NEMA 12 non-metallic.
3.
Conduit penetration of enclosures shall be from the bottom only.
Published: 01/01
Revised:
DIVISION 16 - ELECTRICAL
SECTION 16700-3 of 3
REMOTE MONITORING SYSTEM
4.
All external wiring shall connect to internal wiring via terminal strips.
5.
All wiring shall have numbers at both ends. Wire numbers shall be shown on all
schematics/diagrams.
16700.03 EXECUTION
A.
General
The arrangement of wiring and workmanship requirements for the installation of items
furnished under this Special Provision shall be as specified herein and as specified in
SECTION 16100, ELECTRICAL.
B.
Remote Terminal Interface
Through an Open End Contract, the County will install a remote terminal unit housed in an
enclosure to interface the terminal strip with the County's master station.
END OF SECTION
Published: 01/01
Revised: