Siemens 8BK81-12 AC medium voltage metal enclosed withdrawable switchgear

8BK81 Series Metal-Clad Withdrawable Switchgear

SUMMARY

8BK81(KYN18-12)metal-clad Withdrawable switchgear is suitable for 3-phase AC 50Hz, 7.2~12kV single busbar and single busbar section system.Apply to distribute electricity power and implement system control,protection and supervision monitoring.The switchgear complies with the standards IEC298,GB3906,DL404.

OPERATIONAL CONDITIONS

Ambient temperature: +40℃ to -10℃.
Altitude: 1000m(max).
Relative humidity: daily average less than 95%,monthly less than 90%.
Shock of earthquake: less than 8 magnitude.
This product should not be used under conditions of fire,explosion,earthquake and chemical
corrosion environments.
Note: Special condition and requirement, consult with the manufacturer.

CHARACTERISTIC

All switching operations take place with high-voltage compartment doors closed.
Electrical switch position indication on panel front for circuit-breaker,earthing switch and truck position.
Logical interlocks prevent maloperation.
Positively driven shutters protect against accidental contact with live parts.
Standard degree of protection IP4X against electric shock and ingress of solid foreign bodies.
Operating levers can only be inserted when the interlocking conditions are fulfilled.In this way,undue stress on the interlock mechanisms is avoided.The following operations can only take place when the stated interlock conditions are fulfilled:
Move the withdrawable part from the test position to the service position
-High-voltage compartment door closed
-VCB or VC in the OPEN position
-(Make-proof)earthing switch in the OPEN position
Move the withdrawable part from the service position to the test position
-VCB or VC in the OPEN position
Operate the VCB or VC
-Withdrawable part have been locked in the test position or the service position.
Operate the(make-proof)earthing switch
-Withdrawable part have been locked in the test position.
-Cable compartment door closed
Opening the high-voltage compartment door
Withdrawable part have been locked in the test position.

MAIN TECHNICAL PARAMETERS

NOTES FOR ORDERING

A)  Please provide primary scheme and components technical data.
B)  Please provide secondary wiring principle diagram and specifications, type and technical data of components.
C)  Please provide floor plan and layout of switchgear and controlling busbar arrangement.
D)  Upon ordering, please indicate specifications of main busbar and controlling busbar, if not indicated, as per factory specifications.
E)  If busbar-bridge needed, please provide span dimension.