No RTU alone, however smart, can measure switchgear voltage and feeder current without the appropriate kind of sensors.

Network type, switchgear and customer requirements vary widely, so it would be impossible to include a fixed set of sensors with an RTU like the Netcon 200. Different options are needed.

Netcontrol is an official reseller of Greenwood Power Sensors, developed by Austrian company Greenwood-Power. The selection of sensors available is wide and innovative and not only do all the sensors meet the relevant international IEC 61869 standards and the requirements of today’s smart substations, but they are also cost-efficient. This makes it economically viable to furnish many substations with network monitoring and even with feeder protection implemented by the RTU itself.

Standards compliance with no calibration at commissioning

All the sensors are designed to require no on-site calibration. They come in two grades:

• The non-0U grade satisfies the IEC 61869-11 standard as is.
• The 0U or ECO grade comes with individual correction coefficients and satisfies the standard when these are input into a measurement device that supports them.

Wide variety of accuracy classes

The voltage sensors are available in many different accuracy classes according to IEC 61869: 0.2, 0.5, 1, 3 and 3P, 6P.

Easy to install cones for gas-insulated switchgear

The T240C and T240K series of Greenwood-Power’s voltage sensors come in the form of cones that are simply screwed in place of the blind plugs on the T connectors, one per phase. They are based on the resistive voltage divider technology and are suited for gas insulated (RMU-type) switchgear.

Voltage sensor for air-insulated switchgear

Greenwood-Power also offers the T240L voltage sensor for use with air insulated switchgear. One sensor is installed per phase, in place of a surge arrester or isolator.

Detailed specs

For the detailed specifications of all the sensors, consult the datasheets downloadable from Greenwood-Power’s site: www.greenwood-power.com/products