Elektronics, Regulation and Automatic control

Low and medium voltage control - distribution devices and plants

Low and medium voltage control - distribution devices and plants comprise the following combinations:

Low voltage control distribution cubicles
Automatic rotor starters
Medium voltage distribution cubicles and plants
Power plants for outdoor mounting
Automatic systems for electric generating sets
Components

Low voltage control - distribution cubicles

     Low voltage control - distribution cubicles are applied for distribution and supply of electric power, commanding control of elements of different machines and techological processes. Special pypes of these devices are used for appliance of other special machines.

Characteristics:

Voltage and frequency:		up to 3x600V, 50Hz
Current:		up to 3200A
Mechanical protection:		IP 32, IP 44, IP 54

Designs:

• With fixed, modular or pull - out mounting of elements
• With elements located in the self - standing sheet cases for wall mounting or for outdoor mounting
• The separate programme of these devices make the family of command boards, switchbards and local distribution cubicles

Automatic rotor starters

     Automatic rotor starters are designed for starting induction motors with wound rotor. Designs with air - cooled resistors - TNAPS are appiled mainly in hevy operating conditions (surface mining, etc.).

Characteristics:

Output of electric motor:		up to 2500kW
Rotor voltage:		up to 1500V
Rotor current:		up to 1300A
Number starting degree:		up to 6 for TNAU and TNAPS
Mechanical protection:		IP 44 and IP 44/IP 32

Designs:

     According to method of cooling resistors they are made with oilcooled or aircooled resistors. According to method of control they are made with relay and electric control with a possibility to follow starting current.

Medium voltage distribution cubicles and plants

     Medium voltage distribution cubicles are designed for supply and protection of electric motor, voltage up to 6 kV.

Characteristics:

Voltage:		up to 6 kV
Frequency:		50Hz
Current:		up to 400 A
Impact current of short circuit:		max. 50 kA
Rated short - time current:		up to 200 A eff
Mechanical protection:		IP 54

Design:

     With two types of standard sheet metal case and with the desirable combination of electric devise.

Power plants for outdoor mounting

     They are applied in specific and heavy conditions of operation: surface mining, conveyor systems, mining equipment, machines, etc.

Characteristics:

     In the plant there are mounted the various combinations of low and medium voltage equipment, rotor starters and control devices.

Designs:

     Various combinations of the mounted equipment.

Devices for automation of electric generating sets

     They are designed for automation of operation of electric generating set rating from 0.6 to 560 kVA They enable realisation of great number of requirements in use depending on the type of the applied generator and drive motor and for various types of electric generating sets from the simplast to the most complex requirements for automation.

Production programme:

• Control cubicles for manual, automatic, shortbreak and parallel operation of electric generating set
• Control cubicles for electric generating sets with synchronous and induction generators
• Control cubicles for conveying, stationary, transport, compact and container type electric generating sets

Design:

     Automatic devices for electric generating sets are delivered with power and control electric built into control distribution cubicles, the form and dimension of which is adjusted to type and size of generating sets.

Components

     They are designed as elements to form and mount electric power and electric control plants.

Production programme:

• Sheet metal cases: wall-mounting, self-standing, boards
• Printed panel, single - sided and double sided, with or without metallized hole