Cathodic protection monitoring for pipelines

Description
Steel pipelines are protected against corrosion through cathodic protection. The cathodic protection needs to be maintained. This means that the voltage and current need to be within the defined boundary. With this remote monitoring device the voltage and current can be measured on a continuous basis. As a result damages and degradation is detected earlier, operational costs are reduced and asset lifetime is increased.

Specifications

There are three versions of the cathodic protection remote monitoring devices. The first version is suitable for test posts, drains and isolation joints. The second version is suitable for Modbus (RS485) enabled rectifiers. The third version is suitable for any other rectifier type.

Withthegrid cathodic protection overview

Device Specifications

  • Product code: CP-pole
  • Cathodic protection pole device: Range and accuracy of AC+DC voltage: +/- 50mV-35V @ +/- 1% + 1 digit resolution
  • Range and accuracy AC+DC current: +/- 10mA-20A @ +/- 2.5% + 1 digit resolution
  • Frequency AC: 16 – 100 Hz (digitally filtered)
  • Number of AC+DC voltage channels: 5 + 1 ref.
  • Number of channels voltage current: 1 (in combination with max. 3 voltage channels)
  • Impedance: > 4 MOhm
  • Switch accuracy: +/- 1 ms
  • Power supply: Battery (without replacement for 6 years with 4X / day measurement)
  • Communication protocol: GPRS / NB-IoT / LTE-M
  • Remote adjustable measuring frequency (1X / 5 minutes to 1X / week)
  • Switching off the device to carry out works
  • IP rating: 65 (Modbus variant: IP20)
  • Dimensions: 250*80*70mm
  • Conform the NEN-norms 13509:2003
  • Remote adjustment of measurement frequency (1X/minute to 1X/week)
  • Remote pausing of measurements during works
  • Does not need to be physically decoupled during welding

Recifier Modbus

  • Product code: CP-modbus
  • Read Amstel rectifier
  • Adjust Amstel rectifier settings
  • Change measurement frequency
  • Turn off rectifier for works
  • Communication protocol: GPRS/LTE-M
  • IP-rating: 20
  • Dimensions: 90*53*58mm
  • Power supply: 24VDC

Rectifier analog

  • Product code: CP-rect-analog
  • Cathodic protection pole device: Range and accuracy of AC+DC voltage: +/- 50mV-35V @ +/- 1% + 1 digit resolution
  • Range and accuracy AC+DC current: +/- 10mA-20A @ +/- 2.5% + 1 digit resolution
  • Frequency AC: 16 – 100 Hz (digitally filtered)
  • Number of AC+DC voltage channels: 5 + 1 ref.
  • Number of channels voltage current: 1 (in combination with max. 3 voltage channels)
  • Impedance: > 4 MOhm
  • Switch accuracy: +/- 1 ms
  • Power supply: 230V
  • Communication protocol: GPRS / NB-IoT / LTE-M
  • Remote adjustable measuring frequency (1X / 5 minutes to 1X / week)
  • Switching off the device to carry out works
  • IP rating: 65 (Modbus variant: IP20)
  • Dimensions: 250*80*70mm
  • Conform the NEN-norms 13509:2003
  • Remote adjustment of measurement frequency (1X/minute to 1X/week)
  • Remote pausing of measurements during works
  • Does not need to be physically decoupled during welding

Device partner

Certified partner

Datasheet

System integrator

System integrator

Contact

Application functionality

  • Create tasks ( e.g. measurement rounds)
  • Assign tasks to individuals
  • User management incl. assigning rights
  • Remote monitoring sensors specifically for CP
  • Overview of sensor functionality
  • Link CP measurements with asset data
  • Set up manual walking routes
  • Manual measurements
  • Create tasks ( e.g. measurement rounds)
  • Assign tasks to individuals
  • User management incl. assigning rights
  • Remote monitoring sensors specifically for CP
  • Overview of sensor functionality

Contact us

Contact us for more information or a demo or to receive the case study

What is cathodic protection?

Cathodic protection is a way of protecting pipes from corrosion. This preventive measure supplies a direct current to steel pipes that run into soil or water. Due to the electric current on the steel pipes there is a potential drop.

What is telemetry?

Telemetry, or remote control, is the remote monitoring of conduits with the aid of sensors. Withthegrid sensors are connected to an asset and periodically send encrypted measurement data to an online dashboard. Our digital map shows which parts of the pipe are functioning properly and which ones need attention. In the event of a malfunction, you are immediately notified. The panel will then show what action needs to be taken. Once implemented, actions can be analyzed.

Why remote control?

The main advantage of remote control of cathodic protection is faster fault detection. This can be a rectifier turned off, disconnected test points following field work or unexpected excavation damages. Because disruptions can be resolved faster, the lifetime of the asset is extended. In responding to status changes,CP technicians can be deployed virtually with a digital dashboard, resulting in a significant savings in paid time. This also reduces the number of vehicles on the road, which results in lower CO2 emissions.

How to measure and monitor cathodic protection with Withthegrid devices?
Withthegrid devices monitor cathodic protection on steel pipes. The devices are connected to the rectifier and various measuring points along the pipe. Both the voltage ( DC + AC ) and the current (DC + AC) are measured (in accordance with NEN-EN 13509: 2003 ) . A coupon measurement is also possible to measure the IR-Free (in accordance with ISO-NEN18086: 2015). The data is then sent to a digital dashboard. This allows transparency within the entire CP system. Additionally, the rectifier can be switched for the execution of off potential measurements or for doing work on the pipelines.

Which CP installations does the Withthegrid system work on?

Modbus connection rectifiers: For the Amstel rectifiers with a Modbus connection, a specific sensor is available (Amstel modbus sensor powered by Withthegrid) to ensure that settings in the rectifier can be adjusted remotely and that precise and synchronous switching can be made.

Other rectifiers: Other rectifiers are read out and switched via an analog connection. Accurate and synchronous switching is made possible thanks to an external Eaton relay.

CP – points: The Withthegrid sensors can be placed in metal poles and round plastic poles.

AC / DC-drains: The Withthegrid sensors may also be placed in drains.