RU157693U1 - MICROPROCESSOR CENTRALIZATION SYSTEM POWER SUPPLY INSTALLATION - Google Patents

Abstract

1. The feed installation of the microprocessor centralization system, which includes the main feeder, the backup feeder and the diesel generator set feeder associated with the power input device (VUV), automatic power reserve unit (ABP), distribution board (RC), isolation transformers (IT), an uninterruptible power supply (UBP) device, characterized in that it is equipped with a household load feeder, while the power input device (VUV) is equipped with a surge protection device, and the outputs of the power input device (VUV) under are connected to the input of the automatic transfer switch (ATS), the output of which is connected to two isolation transformers (IT), while the output of one isolation transformer (IT) is the input of the guaranteed power bus, and the output of another isolation transformer (IT) through a pulse protection device surge is connected to the input of the uninterruptible power supply (UPS), the output of which is the input of the redundant power bus. 2. The installation according to claim 1, characterized in that the uninterruptible power supply device (UBP) is equipped with a fixed and sealed power off button (KVP) located on the remote control of the key rods and intended for emergency shutdown of the uninterruptible power supply device (UBP) .3. The installation according to claim 1, characterized in that the automatic transfer switch (ATS) unit is equipped with light indication blocks of the current feeder status, an ATS operation mode selection unit, a priority feeder setting unit, a manual feeder switching unit, and a manual reset unit for the current feeder. 4. Installation according to claim 1, characterized in that the automatic

Description

The utility model relates to power supply systems for microprocessor centralization, as well as relay guards and floor devices of railway stations and, if necessary, adjacent sections, providing them with guaranteed and redundant power supply during the entire period of operation.

A known installation of uninterruptible power supply for railway automation, containing input feeders and a first unit for monitoring the status and switching of feeders, the power output of which is the output of the installation, which provides for the second and third units for monitoring the status and switching of feeders, overvoltage protection units, uninterruptible power supplies, first , second and third blocks: indication of the current status of feeders, indication of statistics of the status of feeders, setting priorities for feeders, setting delays switching feeders and manual control unit, input feeders through overvoltage protection units are connected to the power inputs of the third unit for monitoring the status and switching of feeders, the power output of which is connected to the power inputs of the uninterruptible power supply and the first power input of the first unit for monitoring the status and switching of feeders, inputs / the synchronization outputs of uninterruptible power supplies are interconnected, the outputs of uninterruptible power supplies are connected to the power inputs of the second state control unit and feeder switching, the second power input of the first status and feeder switching unit is connected to the power output of the second status and feeder switching unit, the first signal outputs of the first, second and third feeder and status monitoring and feeder units are connected to the corresponding display units of the current feeder status, and second signal outputs - with corresponding blocks for displaying the statistics of feeder status, the first control inputs of the first, second and third state control units and commutators tion of feeders connected to respective feeders job priority blocks, the second control input - with corresponding reference blocks feeder switching delay, and the third control input - a manual control unit (see. Patent for invention RU No. 2215355, Cl. H02J 9/06, op. in 2002). This technical solution is aimed at providing backup or emergency power supply and is a special case of the power supply system.

A known unit for automatically turning on the power reserve of railway automation and telemechanics devices is characterized by the presence of inputs of power supply feeders, each of which is connected to internal devices for protection against impulse and switching noise and overvoltage (UZIL), which are associated with power quality control devices for each input of power supply and a device input switching, the mentioned power quality control devices are connected to the switching control logic circuit power supply inputs, which, in turn, controls the operation of the power supply input switching device, the output of which is connected to the internal circuit protection device from impulse and switching interference and overvoltage (UZIL) and to the diagnostic and indication circuit of the unit, which is connected to the diagnostic transmission device information in the dispatch and frequency dispatch control systems (see patent for utility model RU No. 111364, Cl. H02J 9/06, op. in 2011). This technical solution is aimed at the development of emergency and backup power systems and can be used to organize power supply for railway automation and telemechanics (ZhAT) devices.

The closest technical solution is a combined uninterruptible power supply unit containing input feeders, feeder input devices, feeder control and switching units, with the main feeder, reserve feeder and alternative network feeder or diesel generator unit connected to water feeder devices, the outputs of which connected to the input of the first feeder control and switching unit, the output of which is connected to the galvanic isolation device and to the input of the third control and switching unit feeders, the output of the galvanic isolation device is connected to the input of the second feeder control and switching unit, the second feeder control and switching unit includes uninterruptible power supplies, the outputs of which are the output of the second feeder control and switching unit, while the outputs of the first and second feeder control and switching units are inputs for the third block of control and switching feeders, the output of the third block of state monitoring and switching feeders is connected to the electric distribution board, while to the first the first feeder control and switching unit is connected to the first panel digital display of the current state of the board feeders, the first feeder switching delay setting unit and the first feeder priority setting unit, the second unit of the digital feeder control and switching unit is connected to the second board digital indication of the current state of the board feeders, the second unit prioritization of feeders, the second unit for setting the delay of switching feeders, the third unit of the digital indicator is connected to the third unit for monitoring and switching feeders the current state of the feeders of the panel board version, the third block for setting the delay for switching the feeders, the third block for setting the priorities of the feeders, the manual control unit is connected to the first, second and third blocks of control and switching of feeders (see Utility Model Patent RU No. 101280, Cl. H02J 9/04, op. in 2010). This technical solution is aimed at providing backup or emergency power supply with automatic switching of power sources in automation equipment on railways and other systems. This installation includes a main feeder, a reserve feeder and an alternative network feeder or diesel generator unit, feeder input devices and an emergency shutdown switch connected to water devices, and the connection diagram of the main nodes. This patent relates to one of the main systems - providing backup and emergency power supply and does not solve the problem of simultaneous guaranteed and redundant power supply.

This utility model is aimed at solving the technical problem of increasing the reliability and safety of the microprocessor centralization power supply system by the possibility of choosing operating modes, automatically switching the load from one feeder to another, using isolation transformers as galvanic isolation from external power sources, and using surge protection devices , possibilities of uninterrupted load transfer in bypass mode in case of device malfunction and uninterruptible power supply, as well as to realize the function of a power failure all consumers of the load.

The solution of the stated technical problem is achieved by the fact that the power supply system of the microprocessor centralization, including the main feeder, the backup feeder and the feeder of the diesel generator unit, connected with the power input device (VUV), the automatic reserve enable unit (ATS), switchboard (RC), isolation transformers (IT), an uninterruptible power supply (UBP), is equipped with a household load feeder, while the power input device (VUV) is equipped with a surge protection device, the output being power input devices (VUV) are connected to the input of the automatic transfer switch (ATS), the output of which is connected to two isolation transformers (IT), while the output of one isolation transformer (IT) is the input of the guaranteed power bus, and the output of another isolation transformer (IT) ) through the surge protection device is connected to the input of the uninterruptible power supply (UPS), the output of which is the input of the redundant power bus. The uninterruptible power supply device (UPS) is equipped with a fixed and sealed button to turn off the power (KVP) located on the remote control of the key rods and designed for emergency shutdown of the uninterruptible power supply device (UPS). The automatic transfer switch (ATS) unit is equipped with light indication blocks for the current status of the feeders, an ATS operation mode selection block, a priority feeder setting unit, a manual feeder switching unit, and a manual reset unit for the current feeder. The automatic switch-on unit (ATS) is equipped with contactors, voltage quality control relays and a time relay designed to switch to either “automatic”, “automatic with priority” or “manual” modes, while the time relay is designed to withstand time switching to a priority feeder. The installation is equipped with a power-off sealed button with a power-off button (KVP) located on the key-wand panel (PKZh) and designed for emergency shutdown of the uninterruptible power supply device (UBP) and feeder input devices (VUV).

The utility model is illustrated by drawings.

FIG. 1 Block diagram of the power plant microprocessor centralization.

FIG. 2 Scheme of automatic inclusion of a reserve (ABP).

FIG. 3 Block select operation mode ATS.

FIG. 4 The block of inclusion of the power contactor of the first feeder;

FIG. 5 Power contactor switching unit of the second feeder;

FIG. 6 Power switch block of the third feeder;

FIG. 7 Uninterruptible power supply circuit.

The microprocessor centralization system feed installation includes a main feeder 1, a backup feeder 2, a diesel generator set feeder 3 and a domestic load feeder 4. The installation is equipped with power input devices 5 (input devices of the VUV feeder) of feeders 1, 2, 3 and 4, with the help of which, external power sources are connected to the elements of the power unit. Introductory devices 5 (VUV) have a surge protection function and remote control of the switching device in the event of an emergency power outage. The installation comprises a unit 6 of three-mode automatic switching on of the ATS reserve, isolation transformers 7 (IT), an uninterruptible power supply device (UPS) 8 and a battery cabinet 9 (BS).

In FIG. 1 schematically shows a block diagram of a power plant of a microprocessor centralization system, including a main feeder 1, a backup feeder 2, a feeder 3 of a diesel generator unit, a feeder 4 household loads, input devices 5 of a feeder (VUV), a unit 6 of three-mode automatic reserve enable (ABP), isolation transformers 7 (IT), uninterruptible power supply device (UPS) 8; a battery cabinet 9 (BS), a switch 10 for switching on the main power supply (GP), a switch 11 for switching on the backup power supply (GRP), a power distribution bus 12, a guaranteed power supply bus 13, a redundant power bus 14, a surge protection device 15 (UZIL), button 16 power off (KVP), remote 17 keys of the rods (PKZH).

In FIG. 2 shows a block diagram of a unit 6 of three-mode automatic switching on of the ATS reserve, including 18 - a power contactor 18 of a feeder 1, a power contactor 19 of a feeder 2, a power contactor 20 of a feeder 3, blocks 21 of the protection circuit for monitoring the status of feeders, blocks 22 for monitoring the status of feeders, blocks 23 light indication of the current status of feeders. Depicted in FIG. 3 is a block diagram of an ATS operating mode selection unit includes a manual reset unit 24 for the current feeder, an ATS operating mode setting unit 25, feeder switching delay units 26, a priority feeder selection unit 27, a manual feeder switching unit 28. Block 6 of the three-mode automatic switch-on of the ATS reserve includes the block 29 for selecting the operating mode of the ATS, the block 30 for turning on the power contactor 18 of the feeder 1, the block 31 for turning on the power contactor 19 of the feeder 2, the block 32 for turning on the power contactor 20 of the feeder 3. Referring to FIG. 7, a diagram of an uninterruptible power supply device 8, includes a rectifier 33, an inverter 34, an automatic bypass 35, a device 36 for protecting against reverse supply of voltage to the input mains through a bypass, a manual bypass 37, an output contactor 38, a rechargeable battery 39 (battery).

Device 5 (VUV) is intended for:

- connecting the cable from an external source of three-phase AC voltage of 380-220 V, including the main feeder 1, backup feeder 2, feeder 3 diesel generator set (DGA) and feeder 4 household loads;

- protection of the load and equipment from short circuit currents and overloads.

- protection of the load from surge surges that occur in the cable from an external power source to the installation site of the equipment of the supply unit;

- cable protection from device 5 (VUV) to block 6 (ATS) in case of overloads and short circuits;

- manual shutdown of feeders 1, 2, 3 and 4 with control of the visible separation of the contacts;

- remote control of door opening, operation of circuit breakers and surge protection devices;

- remote shutdown of feeders 1, 2, 3 and 4 in case of emergency (fire, natural disaster, etc.) by pressing sealed, with the fixation of button 16 on the remote control 17 of the key wands or remotely using the interface relay;

- accounting and transmission of information on the amount of electricity consumed, as well as for measuring the quality of the parameters of feeders 1, 2, 3 and 4.

Feeders 1, 2, 3 through devices 5 (VUV) are connected to the input of block 6 (ATS), the output of which is connected to two isolation transformers 7 (IT), which perform the role of galvanic isolation from the input power. The output of one transformer 7 (IT) is the input of the bus 13 guaranteed power, from which the load is turned on, not critical to voltage dips when switching from one supply feeder to another. The output of the second isolation transformer 7 (IT) in parallel with the device 15 surge protection (UZIL) are the first input of the switch 10 to turn on the main power (GP) and switch 11 to turn on the backup power (GRP).

The first output of the VOP is the input of the device 8 uninterruptible power supply (UBP), the output of which through the second input of the switch 10 to turn on the main power supply (VOP) through its second output, is the input of the bus 12 power distribution. The output of the switch 11 turning on the backup power (GRP) is also the input of the bus 12 power distribution. In order to exclude the possibility of combining the outputs from the transformer 7 (IT) through the switch 11 (GRP) and from the device 8 (UBP) through the switch 10 (GP), the switch 11 (GRP) is located and controlled in the off state. The output of the power distribution bus 12 is the input of an isolation transformer 7 (IT), to the output of which a redundant power bus 14 is connected.

Unit 6 (ABP) includes a power contactor 18 of a feeder 1, a power contactor 19 of a feeder 2, a power contactor 20 of a feeder 3, blocks 21 of a protection circuit for monitoring the status of feeders, blocks 22 for monitoring the status of feeders, blocks 26 of a delay for switching feeders, block 29 for selecting an operating mode ATS, block 30 enable power contactor 18 feeder 1, block 31 enable power contactor 19 feeder 2 block 32 enable power contactor 20 feeder 3. To block 6 ATS connected blocks 23 light indication of the current status of feeders 1, 2 and 3, block 25 setting mode ABP work; block 27 select the priority feeder, block 28 manual switching feeders, blocks 24 manual reset of the current feeder.

Block 6 (ABP) is intended for:

- connecting input feeders of three-phase alternating current from device 5 (VUV);

- automatic transfer of load from one feeder to another when one of the phases breaks, the neutral breaks or the feeder is turned off;

- disconnecting the load from the feeders when their controlled parameters deviate from the normalized values, as well as connecting to the load when the controlled parameters of the feeders correspond to the normalized values;

- work in one of the modes: in automatic mode with the choice of priority feeder, in automatic mode without the choice of priority feeder, in manual mode;

- electrical isolation of the power circuits of the MPC devices from external AC sources, as well as their protection during overloads;

- optical indication of the status of feeders;

- control of phase rotation of power feeders;

- generalized control of operation of surge protection devices and circuit breakers

- optical indication of operation of the circuit breaker.

Block 6 of the three-mode automatic switch on reserve (ATS) is equipped with blocks 23 for light indication of the current state of feeders, power contactors 18, 19 and 20, blocks for monitoring the status of feeders, blocks 26 for delaying feeders, a block for selecting the operating mode for the ATS, block 27 for selecting a priority feeder, block 28 for manual switching of feeders, blocks 24 for manual reset of the current feeder and is designed to switch to one of three modes, while blocks 26 delays for switching feeders are designed to withstand time during transition and the priority feeder.

The operating modes of block 6 (ABP):

The first. Auto mode. The mode when the load is supplied from the feeder to which the last switching of block 6 (ATS) was made. The feeder will feed the load until this feeder is of proper quality (skips the feeder status control unit 22), or until another mode of operation of unit 6 (ABP) is selected. In case of unsatisfactory quality of the input feeder, unit 6 (ABP) will automatically transfer the load to any other feeder with satisfactory quality (if any), and if there is no feeder with satisfactory quality, the load will remain without external power. In this case, the critical load (MPC) will be powered from the device 8 UBP through batteries 39 (battery) in the cabinet 9 BS.

Second. Auto mode with priority. A mode that repeats the operation of the automatic mode, with the exception of switching to the priority feeder. Switching to the priority feeder is subject to satisfactory quality of the feeder, which is set to priority with a time delay, after which the unit 6 (ABP) transfers the load to the desired priority feeder. The time delay is provided by the feeder switching delay unit 26. If the priority feeder is disconnected or unsatisfactory, the load automatically switches to another satisfactory feeder. When restoring the satisfactory quality of the priority feeder, the load will be automatically switched to the priority feeder after the time expires, block 26 delay on switching feeders. The priority of the feeder is set by the three-position handle “PRIORITY” installed on the cabinet door of the unit 6 (ABP).

Third. Manual mode. In manual mode, the transition from feeder to feeder is possible only using the three-position knob "MANUAL" block 28 manual switching feeders. In this mode, the load is transferred to the selectable feeder manually, without automatically transferring the load to any other satisfactory feeder, i.e. when working in manual mode - the load may be connected to an absent feeder, or disconnected when the feeder goes beyond permissible limits.

In the supply unit of the microprocessor centralization system, the ability to switch the load to the bypass mode, i.e. in the mode when the load is supplied from an AC power source (input feeder) bypassing device 8 (UPS). Switching is carried out using knife switches 10 (GP) and 11 (GRP).

Isolation transformers 7 (IT) are intended for electric power systems of alternating current with voltage up to 600 V, frequency 50 Hz and low voltage supply of various circuits, as well as for galvanic isolation of input supply circuits from load. In some cases, remote ones are connected through isolation transformers 7 (IT): the automated workplace of the station duty officer (AWP DSP), the automated workplace of the operator of the technical inspection station for cars (AWP PTO), the automated workplace of the operator of the local government area (AWP MU), etc. .In the feed installation, three-phase and single-phase isolation transformers 7 are used.

The device 8 uninterruptible power supply (UPS) is designed to power critical loads. Due to the battery 39 (battery), placed in the battery cabinet 9 (BS), it provides continuous power to the loads connected to the uninterruptible power supply system for a set time when switching external power sources or when they are turned off for at least 60 minutes. Device 8 (UBP) contains a rectifier 33, an inverter 34, an automatic bypass 35, a device 36 for protecting against reverse supply of voltage to the input mains via bypass 35, a manual bypass 37, and an output contactor 38. If the voltage at the output of the inverter 34 disappears, in case of overload or short output short circuit, the load is instantly connected to the mains via automatic bypass 35, and it is provided that device 8 (UPS) automatically returns to normal operation when the cause that causes the load to switch to bypass 35. Device 8 (UPS) can be included in a system with a redundant parallel architecture, when the power supply for the critical load is carried out by two or more devices 8 (UPS), which increases the stability and uninterrupted power supply, and also allows maintenance of device 8 (UPS) without disconnect critical load.

For emergency power off of the microprocessor-based centralization system, a power-off 16 lock button (KVP), which is located on the remote control 17 of the key-wands (PKZH), is sealed with fixation. In an emergency, the staff presses button 16 (KVP), while the input power to the device 5 (VUV) is turned off. In parallel, the device 8 (UBP) turns off the inverter 34 and the output contactor 38, the voltage is removed from the load connected to the redundant power bus 14. Thus, the power at the station can be completely turned off (in devices 5 (VUV) and on device 8 (UBP). There is a regular place for installing the emergency shutdown jumper on the interface board. When the jumper is installed, the emergency power off circuit in device 8 is bridged and the shutdown is not going on.

The microprocessor centralization system supply unit is designed for:

- guaranteed power supply to loads that are not critical to voltage dips when switching from one supply feeder to another;

- redundant power supply for both MPTC EBILock 950 devices and ABTC-E centralized automatic locking integrated into the EBILock 950 MPC system, as well as other microprocessor, electronic and relay ZHATS devices;

- load protection from impulse noise and overvoltage;

- protection of input and output lines from overloads and short circuits;

- automatic load switching from one feeder to another when their controlled parameters are disconnected or deviated from normalized values in a working feeder.

The microprocessor centralization system power supply provides:

- connection of external power sources to the elements of the power plant;

- load protection against atmospheric and switching overvoltages;

- metering of electricity consumed from external sources;

- continuity of power supply to loads connected to an uninterruptible power supply system for a set time when switching external power sources or when they are turned off for at least 60 minutes, and the backup time can be increased to 120 minutes or more;

- indication of the status of feeders, disconnection of external power supplies from the load when their controlled parameters deviate from the normalized values, as well as connecting to the load when the controlled parameters of the external power sources correspond to standardized values;

- generalized monitoring of the operation of surge protection devices and circuit breakers, as well as an indication of their operation;

- galvanic isolation of power circuits of the MPC devices, relay loads from external alternating current sources, as well as their protection during overloads;

- the use of maintenance-free batteries and the maintenance of the battery in automatic mode;

- emergency shutdown of external power sources and uninterruptible power supply in case of emergency or in case of fire.

- Indication on the front panel of the uninterruptible power supply unit of the frequency of the output alternating current, battery life, total load of the power supply, input, output voltages and currents, sound accompaniment, as well as an indication of the normal and pre-failure state;

- the ability to connect equipment of diagnostic systems for measuring various parameters (AIC DK);

- the ability to turn on the load in the bypass mode, ie in the mode when the load is supplied from an AC power source (input feeder) bypassing the uninterruptible power supply device.

When the feed installation of the microprocessor centralization system is operating, the first stage of power supply provides guaranteed power to the installation from input feeders connected via transformers 7 (IT). Depending on the selected operating mode and on the basis of the analysis of the current state of the input feeders, with the help of hardware monitoring and control, one or another feeder is selected.

The second stage of power supply is provided by device 8 (UBP). Basically, a circuit with a single device 8 uninterruptible power supply (UPS), which provides a continuous supply of electricity regardless of the status of the input feeders. In order to increase the survivability of the system, in the second stage of power supply, several devices 8 (UBP) can be connected - up to eight pieces.

The voltage at the input of block 6 (ABP) is controlled by the feeder state control unit 22. The so-called “ABP gates” are set up in such a way that in case of voltage exceeding the limits of the monitored values of the input network, this feeder is excluded from operation until the moment when the monitored values come to normal.

The voltage at the input of the device 8 (UBP), in turn, using hardware is constantly monitored by the device 8 (UBP). Since the "gate AVR" are narrower compared with the "gate" of the device 8 (UBP), it eliminates the possibility of supplying low-quality power to the input of the device 8 (UBP).

In the event of a failure of device 8 (UBP) or another emergency situation in the supply unit, a scheme for manual uninterrupted switching of power from the input network is implemented.

Due to the fact that devices 5 (VUV) are equipped with surge protection, the installation uses a household load feeder 4, unit 6 (ATS) contains blocks 22 for monitoring the status of feeders, blocks 23 for indicating the current status of feeders, block 29 for selecting the operating mode of the ATS, allowing to work in one of three operating modes, isolation transformers 7 (IT) were used, the possibility of uninterrupted switching of the load in the bypass mode in the event of a malfunction of the uninterruptible power supply device 8 (UBP) was implemented, as well as The function of emergency power off of all consumers from the load using the button 16 emergency power off (KVP) located on the remote control 17 keys of wands (PKZh), the power supply system microprocessor centralization provides:

- protection against atmospheric and switching overvoltages;

- continuity of power supply to loads connected to an uninterruptible power supply system when switching external power sources or when they are turned off - for a period of at least 60 minutes. in the presence of DHA and 120 min. and more in its absence;

- indication of the status of feeders, disconnection of external power supplies from the load when their controlled parameters deviate from the normalized values, as well as connecting to the load when the controlled parameters of the external power sources correspond to standardized values;

- galvanic isolation of power circuits of the MPC devices, relay loads from external alternating current sources, as well as their protection during overloads;

- emergency shutdown of external power sources and uninterruptible power supply in case of emergency or in case of fire.

- the ability to turn on the load in the bypass mode, ie in the mode when the load is supplied from an AC power source (input feeder) bypassing the uninterruptible power supply device.

Thus, the technical result achieved using the claimed utility model is to increase the reliability and security of the power supply system of microprocessor centralization due to the possibility of choosing operating modes, automatically switching the load from one feeder to another, using isolation transformers as galvanic isolation from external power sources, the use of surge protection devices, the possibility of uninterrupted load switching in the mode Bypass' in case of failure of uninterruptible power supply devices, as well as in the implementation of the functions of a power failure all consumers of the load.

Claims (5)

1. The feed installation of the microprocessor centralization system, which includes the main feeder, the backup feeder and the diesel generator set feeder associated with the power input device (VUV), automatic power reserve unit (ABP), distribution board (RC), isolation transformers (IT), an uninterruptible power supply (UBP) device, characterized in that it is equipped with a household load feeder, while the power input device (VUV) is equipped with a surge protection device, and the outputs of the power input device (VUV) under are connected to the input of the automatic transfer switch (ATS), the output of which is connected to two isolation transformers (IT), while the output of one isolation transformer (IT) is the input of the guaranteed power bus, and the output of another isolation transformer (IT) through a pulse protection device surge is connected to the input of the uninterruptible power supply (UPS), the output of which is the input of the redundant power bus. 2. Installation according to claim 1, characterized in that the uninterruptible power supply device (UPS) is equipped with a fixed and sealed button to turn off the power (KVP) located on the remote control of the key rods and designed for emergency shutdown of the uninterruptible power supply device (UPS). 3. Installation according to claim 1, characterized in that the automatic transfer switch (ATS) unit is equipped with light indication units for the current feeder status, an ATS operation mode selection unit, a priority feeder setting unit, a manual feeder switching unit, and a manual reset unit for the current feeder. 4. Installation according to claim 1, characterized in that the automatic power-on reserve unit (ATS) is equipped with contactors, voltage quality control relays and a time relay, designed to switch to either "automatic" or "automatic with priority", or " manual ", while the timer is designed to withstand time when switching to a priority feeder. 5. Installation according to p. 1, characterized in that it is equipped with a sealed, fixed power-off button (KVP) located on the remote control of the key rods (PKZh) and designed for emergency shutdown of the uninterruptible power supply (UBP) and feeder input devices ( VUV).

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