12kV phase column component refers to the upper and lower brackets, upper and lower outlet blocks, arc extinguishing chamber. Flexible connection, conductive clips and insulating cylinders composed of the primary circuit assembly; is the core component of the circuit breaker in the 12kV system, its main role is to make the medium and high voltage circuit cut off the power supply through the arc extinguishing chamber of the vacuum excellent insulation can quickly quench the arc and inhibit the current, to avoid accidents and accidents, mainly used in the transmission and distribution of electric power control system.

No.	Main technical parameters
Voltage parameters
1	Rated frequency(fr)	Hz	50/60
2	Rated voltage(Ur)	kV	12
3	Rated short-time (1 min)frequency withstand voltage(Ud)	kV	48
4	Rated lightning impulse withstand voltage (peak) (UP)	kV	75
Current parameter
1	Rated current(Ir)	A	630/1250/1600/2000/2500/3150/4000/5000
2	Rated short-circuit breaking current(Isc)	kA	25/31.5/40/50
3	Rated short-circuit breaking current breaking times	Times	30
4	Rated short-time withstand current(Ik)	kA	25/31.5/40/50
5	Rated short circuit duration(tk)	s	4
6	Rated peak withstand current(Ip)	kA	63/80/100/125
7	Rated short-circuit making current(IMC)	kA	63/80/100/125
8	DC component of rated short-circuit breaking current	%	40
9	Rated sequence of operation	O-0.3s-CO-180s-CO O-180s-CO-180s-CO(≥40kA)
Mechanical parameters
1	Mass of moving parts	kg	0.5~5
2	Contact self-closing force	N	70±25~240±80
3	Rated contact pressure	N	2000±200~6000±500
Demand for switching mechanical characteristics
1	Contact opening distance	mm	11±1
2	Average breaking speed (contact closed position to 75% open distance)	m/s	1.1±0.2
3	Average closing speed (30% open distance ~ contact closed position)	m/s	0.6±0.2
4	Contact closing bounce time	ms	≤2
5	Contacts closing and opening are not synchronized	ms	≤2
6	Amplitude of rebound of tripping contacts	mm	≤2
Life
1	Storage period	years	20
2	Mechanical life	Times	10000
3	Allowable contact wear thickness	mm	3

Integrated Assembly – Ready to Install

The phase column comes fully assembled - interrupter, terminals, flexible connection, conductive clips, and insulating cylinder are all aligned and secured at the factory. No field assembly required. Just mount it on the breaker frame and connect the terminals. This saves assembly time and eliminates the variables that come with piecemeal installation.

APG Epoxy Insulating Cylinder

The insulating cylinder is produced using the APG (Automatic Pressure Gelation) process, which eliminates internal voids and ensures consistent dielectric strength. Rated for 48kV power frequency withstand and 75kV lightning impulse, it provides reliable phase-to-phase and phase-to-ground insulation.

Broad Compatibility – VS1-12, ZN63, KYN28A-12

Same mounting dimensions, same terminal spacing, same stroke characteristics. Whether you're building new breakers or replacing worn phase columns in the field, the fit is straightforward and the performance is predictable.

Product Applications

12kV phase column component widely used in metallurgy, mining, petroleum, chemical industry, railroad, broadcasting, communication, industrial high-frequency heating and other 12kV power distribution systems.

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12kV Phase Column Component

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