Key figures

TenneT manages thousands of kilometres of high‑voltage lines and cables and almost 250 substations. Our employees work hard to safeguard the continuity of the electricity supply in the Netherlands – 24 hours a day, 7 days a week. This page provides some key figures about TenneT and its activities.

Overview of technical data (at 4 may 2011)

TenneT is responsible for:

• 19.871 kilometres of high-voltage lines and cables
• 13346 kilometres of 220 kV- and 380 kV high-voltage lines and cables 
  (+290 kilometres 450 kV DC) 
• 6235 kilometres of 110 kV- and 150 kV high-voltage lines and cables 
• 402 substations              

Peak load in 2008

When people all over the Netherlands turn up their heating and switch on all the lights, a large amount of electricity is consumed. This so‑called 'peak load moment' usually occurs in December. Peaks in electricity consumption can also be observed during important sports events, for instance at half‑time during football matches. In 2007 the peak load moment occurred on:

• Date: 22 january 2008 
• Time: 18.00 p.m. 
• Number of MW: 13,957           

Overview of company data

• Employees: almost 1879 (at may 2011)
• Turnover: 7,3 billion (annual report 2011)