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NPT BAY and NPT BAY (9.2) Bay Controllers




NPT BAY bay controller is used to structural component decentralized Automatic Process Control Systems and Information Acquisition & Transmission Systems as a device for collecting and processing of analog and digital data about the facility as well as for control of switching equipment.

Application range:

  • control of a single connection of 330 kV and above;

  • control of two connections of 110-220 kV;

  • control of a group of connections of 6-35 kV.


NPT BAY bay controllers developed by EnergopromAvtomatizatсiya LLC conform to the following directives of FSK EES OJSC:

  • No. 236r “On approval of the organizational procedure of operational blocking in new-generation substations”; 

  • No. 397r “On approval of technical requirements for APCS transformer substations of the Federal Grid Company as regards prevention of unauthorized disabling of operational blocking of APCS transformer substations of the Federal Grid Company”;

  • No. 366r “On approval of a standard list of signals from relay protection and automatic equipment, emergency control automatics, automated informative electric power accounting systems and engineering systems in APCS transformer substations”;

  • No. 286r “Guidelines for use of basic structural patterns and requirements for organization and functions of APCS of 110-750 kV transformer substations with regard to their functional adequacy and reliability.”


 NPT BAY (9.2)

NPT BAY (9.2) bay controllers are designed to be implemented into digital substations. The bay controller enables data transfer according to the protocol IEC 61850-8-1 (MMS) to the top level of the system, communication with other devices according to the protocol IEC 61850-8-1 (GOOSE), and receiving data according to the protocol IEC 61850-9-2 from Merging Unit devices. NPT BAY (9.2) bay controllers also allow for integration of other devices that do not support the IEC 61850 standard. This feature allows connection of these devices to a single information environment according to the IEC 61850 standard.


Advantages of Digital Substation:

  • support of the IEC 61850-8-1 standard for communication with the top level of APCS;

  • receipt and transmission of GOOSE messages, in particular for collection of digital data and transmission of control commands;

  • receipt and processing of IEC 61850-9-2 (9-2LE) data.



Functions performed by the NPT BAY and NPT BAY (9.2) bay controllers

  • switching device position control;

  • acquisition of information about current analog values ​​of direct measurement parameters (current and voltage transformers);

  • calculation of mode settings based on signals from current and voltage transformers

  • operational blocking of switching devices;

  • remote control of two-position objects (TU) with preliminary selection of the control object and false alarm protection;

  • backup control in case of a failure or a lack of the top-level automatic process control system;

  • integration of microprocessor devices of relay protection and automatic equipment, actuatrs and others using digital communication protocols;

  • aquisition of information on the status of two-positional (or more) objects (TS) with an registration accuracy of 1 ms;

  • measurement of normalized analog signals (- 5...5 mA, 0...5 mA, 4...20 mA, 0...20 mA, 0...1 V, 0...5 V, 0...10 V and -10...10 V);

  • continuous formation of an events archive;

  • TS bounce filtering;

  • automatic self-test of all channels (TS, TII, TIT, TU) with display of the information on the device elements and its transmission via information channels;

  • communication with top-level devices in the mode of cyclic, sporadic transmission or based on queries with the use of the protocol IEC 61850-8-1 MMS or IEC 60870-5-104 on two independent Ethernet channels;

  • oscillograms of emergency processes;

  • redundancy functions via two Ethernet ports for connection to LAN.


Amount of controlled data of NPT BAY and NPT BAY (9.2)

Using traditional (copper) cabling:

  • up to 256 digital signals;
  • up to 128 control commands;
  • 96 normalized analog signals (-10-10 V, 4-20 mA etc.);
  • up to 4 units of direct input of current and voltage transformers (each unit of up to 5 channels of voltage and up to 8 channels of current).
  • four external isolated RS485 ports for integration of microprocessor devices that do not support the IEC 61850 standard (Relay Protection and Automatic Equipment, emergency control automatics etc.);
  • an additional rack with input and output units can be installed for connections with a large quantity of switching devices.


Amount of controlled data of NPT BAY (9.2)

Volume of collected analog data: up to 8 threads (IEC 61850-9-2LE). One stream IEC 61850-9-2LE: 4 current and 4 voltages with the step of 80 or 256 points per period.

Volume of digital data and control commands: unlimited.


 Supported data communications protocols

  • IEC 61850-8-1 (MMS server): data exchange with SCADA system, TM;

  • IEC 61850-8-1 (GOOSE subscription/publication): exchange data with other devices automatic process control system, relay protection and automatic equipment, emergency control automatics, TM;

  • IEC 61850-9-2LE (SV subscription): receipt of measurement data from digital current and potential transformers;

  • IEC 60870-5-104 (master/slave): communication with TM subsystem; device integration;

  • IEC 60870-5-101 (master/slave): communication with TM subsystem; device integration;

  • IEC 60870-5-103 (master): device integration;

  • Modbus-RTU (master): device integration;

  • Modbus-TCP (master): device integration.


Advantages of NPT BAY and NPT BAY (9.2) controllers

  • modular and scalable structure of the controller that allows using it to gather information from connections of any complexity;

  • support of all the protocols of IEC 61850 and IEC 60870-5-10x families;

  • option of third-party device integration;

  • user-friendly graphical interface and control panel;

  • support of freely programmable logic based on the IEC 61131 standard;

  • complete support of different languages.


Design of NPT BAY and NPT BAY (9.2) controllers

NPT BAY and NPT BAY (9.2) bay controllers contain an integrated control panel, up to two independent power supplies with an universal input 220 V AC or DC, and 2 independent Ethernet ports.

The control panel is used to display information on the condition of the circuit area controlled by the device, output diagnostic information, current status of operational blocking, as well as to control switching equipment with on connection level, if necessary. For this purpose, the panel features a control mode selection key and navigation keys.




Redundant network interfaces for connection to the station information network serve to increase reliability and availability of the system. Depending on the used network topology, they can operate in different redundancy modes (independently; with switching of ports; in the network bridge mode; in the PRP mode etc.).

Wide range of input-output units allows for a flexible generation of the necessary information capacity.

Exchange of data between the basic processor unit and input and output units occurs via the internal data bus of the rack.

NPT BAY and NPT BAY (9.2) controllers are mounted onto a 19” rack with the use of standard mounting flanges located on the sides of the front panel of the products.

NPT BAY and NPT BAY (9.2) bay controllers have sufficient capacity of non-volatile memory, which enables organization of events archive with a sufficient depth, storage of the necessary parameters and factors, technical record-keeping of the electric power etc.