Project: Subsea pump controller

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NOV, Fuglesangs and Nebb has developed an active subsea cooler concept. Nebb’s part of the project has been development and qualification of a complete control system and communication solution for the subsea pump, including a 45 kW subsea VSD.

The main components in the active cooler system are a heat exchanger, a pump and a control system. Nebb has developed and qualified the control system for operation at 3000 m depth.

The control system is fully redundant, and is qualified according to ISO 13628-6/API 17F.

The project has been a Joint Industry Project (JIP) with Kongsberg Oil & Gas Technologies as JIP leader, and with several oil companies as JIP partners.

The pump module is currently undergoing a 1-year subsea qualification test.

Project duration:  2012-2016.

Nebb delivery

  • Design of control system
  • Engineering
  • Subsea control module, including variable speed drive
  • Development of rouged PLC (Siemens based)
  • Subsea canister design
  • Qualification according to ISO13628-6/API 17F (Nemko)
  • Commissioning
  • Control cabinet
  • HMI application
  • Communication solutions

Subsea Frequency Converter

A major part of Nebb's delivery has been development and qualification of a 45 kW subsea Variable Speed Drive (VSD) with the following specifications:

  • Power: 45 kW
  • Voltage: 400 VAC
  • Depth: 3000 meters
  • Shock & vibration: ISO 13628-6/API 17F approved
  • Standardized Ethernet Communication (Fibre)
  • Designed for redundancy

This is as far as we know the first qualified subsea VSD in its class.

Read more about the product in its product page.


Contact person for subsea VSDs:

Per Morten Jørum
Department Manager, Electrical & Drives
Per.Morten.Jorum@nebb.com
+47 66908300