MРЗС-05Л AИAР.466452.001-12.2

It performs the following functions:

Provides control and measurement of the following values:

• phase currents 1a, 1c, 1b - from 0,1 to 30 Iн (Iн = 5 А);
• currents of positive and reverse sequences;
• three-phase / line voltages of the first busbar section;
• three-phase / line voltages of the second busbar section;
• angles between all currents and voltages;
• network frequencies in both sections;
• active power with a sign;
• reactive power with a sign;
• full power;
• power factor;
• active energy in the forward and reverse directions;
• reactive energy in four quadrants.

Relay protection functions:

• four-stage overcurrent protection (OCP), has the following stages:
• 1 - stage with definite time delay (current pinch-off), or with the possibility of a voltage triggering, or directional OCP with an independent time delay;
• 2 - stage with an indefinite time delay with the possibility of voltage triggering or with a definite time delay (in accordance with IЕС 255-4 types A, B, C, characteristics RТ-80, RТV-1), or directional OCP with indefinite time delay;
• 3 - stage with a definite time delay (overload protection) with the possibility of voltage triggering or directional OCP;
• 4 - stage with a definite time delay (overload protection) with the possibility of voltage triggering or directional OCP.
• two-stage undervoltage protection with the ability to control the current and the inclusion of triggers for AND or OR.
• two-stage overvoltage protection with the inclusion of triggers for AND or OR.
• negative phase-sequence protection (NPSP), reacts to the ratio of the negative sequence current to the direct sequence current (phase failure monitoring (PFM));
• arc fault protection (AFP): start of AFP is carried out through a discrete input from an external arc protection sensor with the ability of current control;
• circuit-breaker failure protection (CBFP) with current control: CBFP is initiated when cut-off tripping events or via a binary input. CBFP has two stages in response time.
• implementation of busbar protection scheme (BPS).
• synchronism control.

Automation functions:

• Transfer switch (TS) with the ability to work not only to reduce, but also to increase the voltage;
• four-time recloser (AR). The AR is started from OCP. Provides the ability to block reclosing through a discrete input;
• circuit breaker control. The circuit breaker can be switched on and off both from the device and via a discrete input (pulsed). If there is a command to cut off the circuit breaker, the on signal is blocked;
• acceleration of OCP after the switch is turned on, or if the second stage of the OCP is forced into the accelerated mode.
• Circuit breaker closing and opening monitoring;
• control of commutation life of switch.

Defined functions, triggers and logical elements:

• number of defined functions - 8;
• number of defined triggers - 4, the status of triggers is stored in non-volatile memory;
• logical elements AND, OR, NOT, EXCLUSIVE-OR.

Emergency registrar of oscillograms of currents with recording of discrete signals:

• parameterizable duration of pre-emergency and emergency recording.
• resolution of the recorder by analog signals - not more than 1.25 ms.
• total recording time - 66 s.

Discrete event recorder:

• 48 recent events,
• up to 43 entries in each accident with a discreteness in time - 1 ms,
• for each accident the following are recorded:
  • all input and output discrete signals, with the fixation of arrival and departure time;
  • maximum value of phase current with fixation of remaining currents and voltages;
  • maximum value of the ratio of the current of the negative sequence to the current of the direct
  • maximum value of phase or linear voltages with fixation of remaining currents and voltages;
  • minimum value of phase or linear voltages with fixation of remaining currents and voltages.

Determining the fault location.

Energy metering:

• active energy - in two directions;
• reactive energy - in four quadrants.

Four groups of settings for all protections.

Short-circuit current auxiliary power supply. If the power supply of the device at the power input of 220 V (or 110 V) The device can be powered from current transformers of phases A and C. In this case, the magnitude of the current must be 4 A or more for one of the phases or for the total of two phases.

Binary inputs feeding from internal source - from the DIP output, two discrete inputs can be energized

Number of freely programmable inputs, outputs, indicators:

• discrete inputs - 10, with the possibility of autonomous power supply of a discrete input;
• discrete relay outputs - 10, without and with the memorization, realization of ShMS;
• LED indicators - 8, with and without memory.
• All inputs, outputs, indicators are freely programmable.