The Future of CP Monitoring & Control
The IPS is a smart control system designed to
provide Monitoring, Control, Data Recording and Synchronous Interruption
of Cathodic Protection Power Supplies on an underground pipeline. These
functions are vital for assessing the efficiency of a CP system and gauging
itís capability to protect the huge capital investment made by the pipeline
owner. A much smaller capital investment in IPS not only maximises the
efficiency of your CP system, but also massively reduces the ongoing costs
of communications, labour and time intensive manual monitoring processes
previously used. IPS utilises the metal pipeline as the communications
medium to create a daisy chained CP Network. Communication with the entire
network can made from an office PC through one "Base Site" via Radiotelephone,
Standard Telephone Modem or Direct Serial Link. Also direct RS232 at any
individual site via Laptop computer. Features of IPS:
monitoring of power supply voltage, current and pipeline potential.
Remote monitoring and control
of settings and parameters.
||Automatic and manual control of CP current
Data Recording of averaged daily readings.
Automatic synchronisation of all
adjacent rectifiers to better than 13ms.
||Remote synchronous interruption of rectifiers
for pipeline survey work.
IPS is available in two models: -
||A retrofit control module
for CP systems that uses the existing DC Power Supply.
stand-alone unit with built in DC Power Supply for new installations.
Current ratings of 10 30 and 100 Amps available.
Installation of an IPS system facilitates remote daily monitoring of an
entire Cathodic Protection (CP) network and also allows the earliest detection
of power supply failures. Each site checks for communications with its
neighbours on an hourly basis and reports by exception if a site is "Down".
Without IPS fault detection can take up to two months between manual inspections.
The ability to monitor the CP voltages on a more regular basis also enables
the early detection of any trends that may indicate deterioration of the
Pipeline/CP system. This early detection of CP problems may significantly
extend the life span of the pipeline. Therefore when considering the cost
of pipeline installations the potential revenue savings can be enormous.
Very significant cost savings are gained from not having to send inspection
teams to visit each CP rectifier individually to ensure it is working.
These savings include; Labour, Travel Time, Fuel costs, Vehicle wear and
tear, Sundry expenses etc.
N.B. IPS negates the 2 monthly rectifier inspection requirement under
AS 2885.3 - 1997 Pipelines - Gas and Liquid petroleum Part 3 Operation
Personnel Safety Safety aspects of less driving time should be noted as
safety is a significant factor in any operation and driving is often the
most risky aspect of a field workers job.
Minimal Ongoing Communications Costs An entire network of CP rectifiers
can be monitored and controlled from one base computer with a data link
to its nearest IPS installation. Communication by, Radio data link, Landline
telephone or Direct serial data link is very inexpensive. This means there
are extremely minor ongoing communications costs compared to other methods
of data collection.
PC Software IPS has a Windows based user interface software package for
carrying out all system control, configuration, monitoring and data download
N.B. Some of the features listed have yet to be
implemented in the production instrument.
||110/230 Volts AC 50/60hz
+/- 15% 10 Watts max
||100 Volts DC maximum
(existing power supply)
||0 to 50 VDC
||0 to 10 Amps DC
||Within 100 mV of set
point in auto mode
||10 V DC max. between
pipe sense and half cell
|Mains Noise Rejection
||14 V RMS maximum
|Raw Data Rate
||10 bits per second
||1ppm after 1 year from
calibration (30ms in 8hrs)
||Better than +/- 13 ms
||9600 bits per second
RS232C for computer
||(null modem cable required
||9600 bits per second
for "AT" compatible modem
||1200 bits per second
RS232C for radio modem
||Galvanic isolation from
||DB9 male connector
||1¼ x ¼"
1 Amp for mains, 10 Amp DC
||275mm high, 220mm wide,
125mm front to back
||Welded 1.6mm mild steel.
Passivated zinc plated,
||Polyester powder coated,
and manufactured by: Solid State Equipment
Ltd, Lower Hutt, New Zealand