MV SWITCHGEAR (PRIMARY)

Technical Detail :

IEC Metal-clad Single Busbar, Solid- and Air-insulated, Vacuum Medium Voltage Switchgear, up to 24 kV

  • A global design that is certified to the latest IEC 62271 -100 and -200 standards.
  • A complete range up to 4000 A, 50 kA-3s short circuit withstand, and 50 kA-0.5s AFLR internal arc classification.
  • Safe in use :
    1. Comprehensive and logical list of mechanical and electrical interlocks
    2. Compartments protected against penetration by objects
    3. Internal arc rating up to 50 kA for 0.5 seconds and 40 kA for second as optional
    4. Internal arc classification of AFLR as optional
    5. Loss of service continuity rating of 2B
    6. Accessibility of compartments
    7. Closed door racking
  • Reliable in operation
    1. Vacuum and cast-resin encapsulation technologies
    2. CESI certified to latest IEC 62271 -100 and -200 standards
    3. Totally enclosed and insulated main Busbar
    4. 20,000 operations on vacuum breakers
    5. Partition classification of PM
  • Efficient over the product life :
    1. 30 year expected product life
    2. Cable access front and rear; cable entry bottom and top
    3. Up to 4000 A main Busbar and breaker ratings
    4. Up to 50 kA short circuit and withstand ratings (3 seconds)
    5. SF6 free
    6. Low end of life disposable costs with all materials being re-usable or recycled
    7. Compact and flexible designs (three widths and two depths of panels)
    8. Environmentally friendly throughout the life cycle
System 12 kV 17.5 kV 24 kV
Rated voltagekV1217.0524
Lightning impulse withstand voltagekV7595125
Power frequency withstand voltagekV283850
Rated frequencyHz50/6050/6050/60
Internal arc classAFLR
Loss of service continuity categoryLSC2B
Partition classPM
Earthing circuitkA - s 25 - 3; 26.3 - 3; 31.5 - 3 40 - 3; 50 - 1 20 - 3; 25 - 3
Circuit breaker ratings
Rated normal currentA 630, 1250, 2000, 2500, 3150, 4000 800, 1250, 2000, 2500
Rated short-circuit breaking currentkA 26.3 / 31.5 / 40 / 50 20 / 25
Rated short-circuit making currentkA 65 / 82 / 104 / 130 65 / 82
Rated short-time withstand currentkA - 3 s 26.3 / 31.5 / 40 / 50 20 / 25
Single capacitor bank switchingC2 A 400
Multiple capacitor bank switching back to backC1 A 400
ClassS1, E2, C1, C2
Operating cycles at short-circuit current100
Auxiliary voltageV 110 / 120 / 127 Vac 50/60 Hz
208 / 220 / 240 Vac 50/60 Hz
24 / 48 / 60 Vdc
110 / 125 Vdc, 220 / 250 Vdc
Mechanism
Rated operating sequenceA O - 0.3s - CO - 15s - CO
O - 0.3s - CO - 180s - CO
Accessibility of compartments
Circuit breaker compartmentInterlock-controlled
Busbar compartmentTool-based / Non-accessible
Cable compartmentTool-based or Interlock-controlled
External degree of protectionIP4X (IP41 as an option)
Internal degree of protectionIP2X (IP3X as an option)
InstallationIndoor
Temperature classification°C-5 to +40
Relative humidity (max)%95
Busbar system
Rated normal currentA 1250, 1600, 2000, 2500, 3150, 4000 (FC*) 1250, 2000, 2500
Rated short-time withstand currentkA - 3 s 25 / 26.3 / 31.5 / 40 / 50 20 / 25
Rated peak withstand currentkA/50Hz 63 / 66 / 80 / 100 / 125 63 / 80
kA/60Hz 65 / 82 / 104 / 130 65 / 82
* FC = Fan cooled