Controller for Power Substation
Controller for Power Substation
(OP)
Hello everyone,
I am looking for a controller (PLC-like) for a power substation. It must have:
1.- analog input for three phase current (5A) and voltaje (120V), coming from substation current and voltaje transformers, as most protective relaying equipment has.
2.- 4-20 mA analog input (PT100 temperature reading).
3.- discrete inputs and outputs.
4.- Very important: It should perform mathematical operations such as +,*,/ and other like sin, cos, square root, etc, in order to implement a control algorithm.
I have found the C90+ controller (GE), but it seeems it does not have a 4-20 mA input yet.
Could you please recommend another -equivalent- device with the base characteristics mentioned above?
Thanks in advance!
I am looking for a controller (PLC-like) for a power substation. It must have:
1.- analog input for three phase current (5A) and voltaje (120V), coming from substation current and voltaje transformers, as most protective relaying equipment has.
2.- 4-20 mA analog input (PT100 temperature reading).
3.- discrete inputs and outputs.
4.- Very important: It should perform mathematical operations such as +,*,/ and other like sin, cos, square root, etc, in order to implement a control algorithm.
I have found the C90+ controller (GE), but it seeems it does not have a 4-20 mA input yet.
Could you please recommend another -equivalent- device with the base characteristics mentioned above?
Thanks in advance!





RE: Controller for Power Substation
If a device can accept analog inputs, the specific signal level should not be an issue. There are inexpensive signal converters that can convert 4-20 mA to whatever level is needed.
David Castor
www.cvoes.com
RE: Controller for Power Substation
RE: Controller for Power Substation
Manufacturers
Siemens
Allen Bradley
Scheinder Electric
Omron
Mitsubishi
even the low priced plcs do what your asking
RE: Controller for Power Substation
To me, its a lot easier to get the data out via a comms interface than it is trying to play around with discrete inputs to get the same result.