New generation cooling system control cabinet

1.      New generation cooling system controlcabinet

Modern controlcabinets of new generation are provided for automatic and manual control ofventilators motors, transformers electric pumps cooling systems in accordancewith IEC requirements and individual requirements of the customer.

Control cabinetsconsist of standardized equipment where control, protection and measuringelements are installed. The elements are installed on two levels.

The level ofswitching devices and level of control and alarm units are separated. Itprovides protection of maintenance and operation. The control cabinet is casingin a metal structure with a door in front and rotary panel inside the casing.

Control cabinets canbe equipped with monitoring and control microprocessor system. Microprocessorcontrol system is simultaneously a substation monitoring system.

The system allowsincreasing life time of the updated transformers and considerably decreasingcosts for their repair at the expense of due detection of defects in process ofoperation.

2.      Description of control cabinets

CC is a metalcabinet equipped with switching and protection units, control and signalingelements, and devices for microclimate provision in cabinet.

CC casing is ametal structure with a door in front. CC equipment is installed on the cabinetrear panel, except control units. Control units are located on the panel behindthe door.

All the elementsare manufactured in series.

CC has high reliabilitylevel, space-saving structure, and easy access to all the components.

The equipmentdistinctive feature is effective usage of work space, high safety andprotection level from random contacts.

CC satisfies IECrequirements, technical specification.

3.      Control cabinets have the followingfunctions:

CC provides:

a.       individual protection of ventilators,electric pumps against short circuit currents, overloads, open-phase modes

b.      automatic or manual selection of powercircuits feeding source

c.       local(indicator lights in control cabinet)and remote (“dry” contacts) signaling;

d.      cooling system control in automatic modeand in manual mode

e.       automatic support of favorable microclimatein the cabinet

f.       local and remote signaling of coolingsystem elements condition

g.      possibility of reserve cooler functionstransfer to any cooler for provision of even wear;

h.      electric pumps and (or) ventilatorselectric motors operation control by the set algorithm depending on load andtemperature of oil transformer windings

i.       protectionof cabinet circuits, electric pumps and ventilator electric motors againstshort circuit current, overload, open phase modes during operation from themain and reserve power sources.