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EP12/2500-40 Embedded Poles
EP12/2500-40 Embedded Pole

EP12/2500-40 Embedded Poles

Vacuum Interrupters Integrated Embedded Pole
Parameter item Unit Value
Rated voltage KV 12
Rated current A 2500
Rated frequency Hz 50
Rated short-circuit breaking current
 KA 40
Breaking times of short-circuit current Time 30
Rated short-circuit making current KA 100
Rated peak withstanding current KA 100
Rated short-time withstanding current (4 seconds) KA 40
Rated single capacitor bank breaking current A 630
Rated back-to-back capacitor breaking current A 400
Short-time power-frequency withstanding voltage KV 48
lighting impulses withstanding voltage (peak) KV 85
Circuit resistance at rated contact force μΩ ≤18
Mechanical life Time 20000
Contact closing force due to bellows and atmosphere N 250±60
Counterforce at rated contact stroke N 340±60
Contact erosion permission length Mm 3
Shelf life Year 20
Part discharge pC ≤5
Rated operating sequence 0-0.3s-C0-180s-C0
Mechanical parameters of vacuum switch
Rated contact gap Mm 9±1
Contact connection gap Mm 4±1
Average breaking speed m/s 1.1±0.2
Average closing speed m/s 0.6±0.2
Rated operation pressure of contact N 4300±300
Bounce duration of contact closing Ms ≤2
Out of simultaneity of contact closing and opening Ms ≤1
Rebound amplitude of breaking contact mm ≤2
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