Koncar Switchgear

Metal Enclosed Gas SF6 Insulated Switchgear

New metal-enclosed gas SF6 insulated switchgear type K8D9 and K9D7 for 72.5 kV to 300 kV is characterized with high-tech quality, contemporary technical solutions and high reliability as a result of many years of experience of production of metal-enclosed switchgears using contemporary methods and tools in the development of those switchgears.	Switchgear type K8D9 for 72.5 kV to 170 kV
	During designing of switchgear, computer workstations and adequate software were used for electrical and mechanical
The basic characteristics of K8D9 and K9D7 switchgear are: Small dimensions and weight System adaptability which allows different installation layouts Accessibility to all standard modules, low noise level thanks to fully enclosed switching and mechanism Flexibility in setting up of standard circuit arrangements fast for easy transportation and assembly due to modular structure Low maintenance cost Minimal gas loss because of reliable sealing system Safety for operating personnel because for full enclosure of switchgear safe operations by personnel due to full enclosure of Switchgear Acceptable for environment because of minimal space taking, low noise level, minimal gas losses and high reliability wich is sutable for urban centers Environmental friendly due to low noise level,minimal gas loes and high reliability and highly suitable for urban centers. Switchgear single line	calculations and that approach resulted with excellent characteristics including high safety standards. Switchgear type K9D7 up to 300 kV

Technical Data
Type	K8D9				K9D7
Rated voltage	72.5 kV	123 kV	145 kV	170 kV	245 kV	300 kV
Rated frequency withstand voltage	140 kV	230 kV	275 kV	325 kV	460 kV	460 kV
Rated lightning impulse withstand voltage 1.2/50 µs	325 kV	550 kV	650 kV	750 kV	1050 kV	1050 kV
Rated short-time current	40 kA -3s
Peak withstand current	100 kA
Rated current busbars	up to 3150 A
Rated breaking current	up to 40 kA
Peak making current	up to 100 kA
Rated current	up to 3150 A
Switching cycle	O-0.3s-CO-3 min.-CO
Make time	60 ms
Break time (arcing time)	54 (24) ms