Low-voltage switchgears NKU RTZO-I
Low-voltage switchgears are three-phase alternating current distributors of closed version, one-way service are designated to distribute electric power to low-power users.
Composition of NKU RTZO-I:
- an input cabinet (ShV);
- a functional control cabinet (ShFnU) with the stop valve control unit, motor control unit, valve control unit, and distribution units.
Up to seven ShFnUs with one ShV can be consolidated into RTZO-I assembly.
Main functions:
- receiving three-phase alternating current on two inputs;
- protecting the main circuits against overload currents and short circuit;
- automatic backup actuation;
- voltage availability monitoring and displaying operating voltage parameters of the main circuit, alarm generating in case of its deviation from a norm or a fault;
- controlling actuators.
Advantages (compared to RTZO-66 and RTZO-88):
Significant reduction of equipment
Reduction by up to 8 times of cable connections
Availability of a built-in valve diagnostics function
Other solutions for power supply systems
Automatics devices for digital substations
The devices ensure automation of digital substations meeting the requirements of the international standard IEC 61850: automation of electric power transmission and distribution, operation of relay protection and automatics systems, recording of emergency events.
Microprocessor relay protection and automatics devices ImPR1
Microprocessor ImPR1 devices are designated for relay protection, automation, and control of systems generating, transmitting, and distributing electric power.
Arc protection devices
ImPR1_ESHubU-1 switching unit with ImPR1_ESensU-1 optical sensors is designated to detect a short circuit arc in distribution devices in a short period of time and to transmit information on a monitored section into relay protection and automatics devices.
Current and voltage sensor
The PSensU-1 current and voltage sensor is designated to measure and monitor current up to 6 kA and voltage up to 6.5 kV and to transmit data via fiber-optical channels into a protection device.
Input panel ShchV-1
The panel is designated to input, protect against impulse lightning overvoltages, and record electric power consumption of three feeders of three-phase voltage depending on the package.
Distribution cabinet ShR-1
The cabinet is designated for connection of 21 users (with rated power 880 V·A each) to a power network by means of automatic switches from two independent feeders.