MKPA-2 microprocessor-based special integrity protection IED is designed to supervise electric power system operating modes.


MKPA-2 is based on single electronic board machine, connected with ADC, binary input/output, and control and indication modules.

MKPA-2 functional purpose is determined by the set of installed algorithms. Each of them implements specific integrity protection function. All data is calculated on the basis of the signals acquired over binary and analog input channels. In case fault condition is identified, MKPA-2 issues required control signals and records the event. When recording data, MKPA-2 timestamps events, creates and saves waveform of the specific signals, creates entry in its internal log and sends indication to SignW application.

Key functions

  • asynchronous mode elimination;
  • automatic load-shedding;
  • overvoltage protection;
  • undervoltage protection;
  • breaker-failure protection;
  • voltage controlled load-shedding;
  • line load-shedding;
  • pre-fault mode supervision;
  • power transformer turn-to-turn faults indication;
  • line tripping identification;
  • unit tripping identification;
  • autotransformer closing/tripping identification;
  • fault severity identification;
  • additional special integrity protection functions, required by the Customer.

Additional functionality

  • large number of standard application projects available at project development stage;
  • ability to implement several special integrity protection functions in a single IED;
  • variety of recorded events;
  • ability to integrate IED in process control system using standard communication protocols: OPC DA, IEC 60870-5-104, IEC 61850;
  • local and remote control functionality;
  • continuous supervision of the key components;
  • integrated environment for the development of special integrity protection algorithms.

Key technical characteristics

number of analog inputs

up to 10 (multiplicity - 2)

sampling frequency of each channel

2 kHz (40 samples/cycle)

number of dry-contact type binary inputs*

6 - 42 (multiplicity - 6)

DC voltage upper measurement limits**

±20 mV, ±75 mV, ±150 mV

AC voltage upper measurement limits (RMS)**

100, 200, 500 V

DC current upper measurement limits**

±5 mA, ±20 mA, ±75 mA, ±150 mA

number of control outputs*

6 - 42 (multiplicity - 6)

ADC resolution


analog signals measurement reduced error

not more than 0.4%

AC current upper measurement limits**

2 A, 5, A, 10 A, 20 A, 50 A


not less than 100 000 hours

supported communication protocols

OPC DA, IEC 608705104, IEC 61850

* Total number of inputs and outputs at 10 analog inputs - 42, - 48 at 8 analog inputs.
** Required measurement limits are defined at order placement stage.

Power supply 220 (+22/-44) V DC or AC. MKPA-2 power consumption does not exceed 50 W. Dry contact type binary inputs rated power supply voltage is 24/48/110/220 V DC (provided with designated feeder)

Dimensions 482,6x132x427 mm (WxHxD), euromechanics, 19’’, 3U enclosure

Operating temperature 0... +50 °С

Weight not more than 10.5 kg

User-defined algorithms development environment SoftConstructor software package