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XGN66-12 Fixed-type (Indoor) Closed Switchgear

XGN66-12 Fixed-type (Indoor) Closed Switchgear


XGN66-12 fixed-type closed switchgear (hereinafter referred to as switchgear) is a new generation of high-voltage electrical product of our company, in line with requirements of national standards GB3906 "-35KV AC metal-enclosed switchgear", Electric Department's DLT404"ordering technology conditions of indoor AC high-voltage switchgear", and also meets the international standard IEC62271" requirements of AC metal-enclosed switchgear and control equipment of 1KV above 52KV"

The product absorbs foreign advanced technology. It is small, only 50% of the size of ordinary switchgear; the circuit breaker has with high reliability and good performance: "five anti" interlocking machinery is reliable, simple and so on. The switch cabinet is indoor equipment of 3.6,7.2,12KV three-phase AC 50Hz single bus segment, for the acceptance and distribution of electrical energy. And it has circuit control, protection and monitoring functions, which can be used in various types of power plants, substations and industrial and mining enterprises, high-rise buildings and other places, and also in the ring network cabinet with ring main unit.

Model and Meaning

The Main Technical Parameters

Switchgear's main technical parameters and component models

No. Item Unit Technical parameters
1 Rated voltage KV 3.6,7.2,12
2 Rated power frequency withstand voltage KV the ground,the same: 42; fracture: 45
3 Rated lightning impulse withstand voltage KV the ground, the same: 75; fracture:85
4 Rate frequency Hz 50
5 Rated current A 630,1250
6 Rated short circuit breaking current(peak) KV 20,25,31.5
7 Rated short circuit closing current (peak) KV 50,63,80.
8 Rated dynamic stable current (peak) KV 50,63,80
9 Lightning electric stable current 4S(RMS) KV 20,25,31.5
10 Protection class   1P2X
11 Dimensions (W × D× H) mm 900X1000X2300
12 Weight Kg -600

Main technical parameters of ZN63-12type vacuum circuit breaker

No. Item Unit Technical parameters
1 Rated voltage KV 12
2 Rated current A 630,1250
3 Rated short circuit breaking current KV 20,25,31.5
4 Rated short circuit closing current KA 50,63,80
5 Rated short-time withstand current(4S effective value) KA 20.25,31.5
6 Rated peak withstand current (peak) KA 50,63,80
7 Mechanicallife Time 10000
8 Rated short-time breaking current breaking times Time 50
9 Rated operating sequence   o-0.3s-c O-180s-C o
10 Contact head distance mm 11±1
11 Contact contact stroke mm 4±0.5
12 Interphase center distance mm 210
13 Opening speed m/s 1.2±0.2
14 Closing speed m/s 0.6±0.2
15 Opening time ms ≤60
16 Closing time ms ≤75
17 Three - phase opening synchronization ms ≤2
18 Closing bounce ms ≤2
19 Loop resistance µΩ ≤45
20 Accumulated allowable wear thickness of contact head mm 3

Layout Diagram