TPA-01 protection cabinet is intended for the implementation of protection and automation functions for 110‑220 kV HV power lines, and SIPS functions for voltage category 110 kV and above.
The number of functions in a single TPA-01 is limited by the number of analog and binary signal channels. The range of functions implemented in a single cabinet is determined by the design solution incoordination with the System Operator.

Each function can have an arbitrary number of steps, and remote starting elements can have an arbitrary trigger zone.

The functions are implemented in the FBD (Function Block Diagram) visual programming language according to the IEC 61131‑3 international standard.

In the event of a client having non-standard requirements, the FBD allows to customize the TPA-01 to take into account the corresponding facility`s special features.

SIPS functions

  • Out-of-step protection
  • Overvoltage protection
  • Undervoltage protection
  • Underfrequency protection
  • Overfrequency protection
  • Equipment overload protection
  • Automatic load shedding by power overload
  • Automatic load shedding by close short circuits
  • Special load shedding automatics
  • Pre-fault mode supervision
  • Line tripping identification
  • Transformer tripping identification
  • Generator block tripping identification
  • Bus tripping identification
  • Power drop identification
  • Fault severity identification

RP functions

  • Line differential protection (87)
  • Directional overcurrent protection with remote blocking (67HBF)
  • Distance protection (21)
  • Ground directional overcurrent protection (67G)
  • Instantaneous overcurrent protection (50)
  • Time delay overcurrent protection (51)
  • Breaker failure (50BF)
  • Auto reclose (79)
  • Synchronizing or synchronism-check device (25)
  • Out-of-step block/trip (68)
  • Circuit breaker control functions
  • Reverse-phase ratio overcurrent protection
  • Circuit breaker phase loss protection

Basic performance data

input voltage measurement limits

100 V; 200 V

input current measurement limits

2; 10; 20; 50, 100, 200 А

limits of permissible reduced error of voltage and current measurements up to ± 0,4%
permissible frequency absolute measurement error up to ± 0,02 Hz
permissible absolute error of phase shift angle measurement up to ± 1°
number of analog inputs up to 40
input signals frequency measurement range 45…55 Hz
time synchronization error up to 1 ms
number of binary signal input/output channels up to 128

Additional features

  • Ffault recording
  • Self-diagnostics

Communication protocols

  • IEC 60870-5-104
  • IEC 61850 GOOSE
  • IEC 61850 MMS

Power supply

  • 120–370 VDC
  • 85–265 VAC

Operating temperature range


Development environment for custom algorithms

  • FBD (Function Block Diagram) visual programming language, IEC 61131-3 international standard
  • Soft Constructor development environment