Features and interfaces

Terminal connections

All connections to SYMAP® are made with terminal plugs on the back of

the device, allowing the device to be exchanged easily.

Analog input for measurement

SYMAP® provides inputs for analog sensors at the rear of the device. If

terminal plugs for the CTs are disconnected, the circuits will be linked

automatically so there is no disconnection in the CT circuit loops.

A total of 17 analog inputs for current and voltage transformers are used

for protection functions. The following list shows possible connections

for current transformers (CT) and potential transformers (PT):

•  3 x CT inputs for feeder current

•  1 x CT input for ground current

•  3 x PT inputs for feeder voltage

•  3 x PT inputs for 1st bus bar voltage

•  3 x PT inputs for 2nd bus bar voltage

•  1 x PT input for ground voltage