COMPLETE COMBINED relay protection and automation at a variable control current for the connection of the switchgear ELECTRIC NETWORK 6-35

摘要

The invention relates to the field of electrical and electric power and can be used for relaying switchgear 6-35 kV networks.; The technical result, which is aimed at achieving the proposed technical solution is to expand the arsenal of hardware and improving the reliability of the device. Expansion of the functional composition increases the degree of alignment, since one and the same apparatus is used to protect all electrical connections of the switchgear, for example, the input transmission line section switch.; SUMMARY: The technical result is achieved in that in a complete apparatus combined relaying and automation with AC control current for the connection of electrical switchgear 6-35 kV networks containing feeder current transformers (number of phases), current transformer zero sequence accession parallel connected coils circuit breaker and power modules deshuntirovaniya (number of phases), current-voltage converters (number of phases), the power module, the first step of the maxi mal overcurrent, the second overcurrent stage, third stage overcurrent protection asymmetric modes of operation, circuit "OR", protection against earth fault current body redundancy in case of failure switch block circuit breaker, block auto-reclosing circuit breaker, switching module switch block warning, prohibition module logic busbar protection, the scheme of "I", the output relay switch redundancy in case of failures, power arc protection, current indicator in, wherein the feeder current transformers (by phase number) via the parallel-connected coil of the circuit breaker and power modules deshuntirovaniya (by phase number) are connected to the inputs of current-voltage converter (for the number of phases), the first outputs of these inverters are connected respectively to the first inputs of the first stage overcurrent, the second overcurrent stage, third stage, overcurrent protection, by asymmetric modes of operation, when the current redundancy organ failure Power off of Tell, and the indicator current, and the second output - with the first power supply inputs, a current transformer is zero connection sequence is connected to a protection ground fault and a second input of the current indicator, the first outputs of the first stage overcurrent, the second overcurrent stage and third stage overcurrent protection connected to inputs of an "OR" circuit whose output is connected to a logic module prohibition input busbar and the arc protection unit whose output is connected to the first input unit warning is editelnoy signaling and the first input of the circuit breaker trip unit, the first output current body redundancy in case of failure switch protection output ground fault protection outputted from the asymmetric modes of operation and second outputs of the first stage overcurrent, the second overcurrent stage and third stage overcurrent protection connected to the second input of the circuit breaker trip unit, the second input circuit "I", the second input of the warning unit and the input of the automatic dressing unit iterated circuit breaker, the output of which is connected to a first input of switching unit switch and a third input of the alarm unit, an output circuit "I" is connected to the output relay redundancy in case of failure switch and a fourth input of the warning unit, the second output current body redundancy in case of failure switch connected to the second input of "AND" circuit, characterized in that for performing protection attachment, which is a supply port, the unit automatically entered into the device including li ne reserve input of which is connected via a voltage relay system (section) tires, which is connected to the protected attachment, allowing automatic transfer switch output unit is connected to the second input of the circuit breaker switching module, and prohibiting output - to a second input of the circuit breaker trip unit.; The current from the current measuring transformers (number of phases) is fed through the parallel-connected circuit breaker trip coil and power modules deshuntirovaniya the inputs of the current-voltage converters. Converted to the required levels of signals applied to the inputs of the first stage overcurrent, the second overcurrent stage, third stage, overcurrent protection, by asymmetric modes of operation, when the current redundancy organ failure switch and protection against earth faults.; Current protection of asymmetric modes of operation has the ability to determine the asymmetric mode current or the negative sequence current unbalance.; Start the third, second and first stages of the overcurrent protection (MTP) according to the "OR" together in "MTZ Start" signal to lock logic module busbar lock logic busbar and for starting the arc protection unit.; When triggered, the current body of redundancy in case of failures and switch "AND" circuit starts set the shutter speed backup time. If the response to the redundancy in case of failure switch the input signal from "AND" circuit is removed, the backup stops. After the holding time signal is generated to actuate a relay output redundancy switch failures during a subsequent trip supply breaker or tripping action on the spool RTM.; Automatic reclosing block (APV) starts at the emergency shutdown switch of the circuit breaker trip unit and no signals from interdiction overcurrent stages, other protection and current body.; The apparatus is able to perform input protection. At the same time the necessary steps to shut down the supply of input switch are performed through a given time delay. Actions to include switch implemented by a command from an external circuit or the operation ban block automatic activation of reserve power, let the voltage relay connected to a voltage transformer.; Circuit breaker switch module switching is performed by teams at action block recloser block and automatic transfer switch.; 1 claim; 1 illustration