Product Overview
The GN30-12 rotary indoor high-voltage disconnector is a new type of rotary-blade disconnector. Its main structure fixes two sets of insulators and contacts on the upper and lower planes of a three-phase common base, and opening and closing is achieved by rotating the blade. The GN30-12D switch is based on the GN30-12 and adds an earthing blade to meet the needs of different power systems. The product is compact in design, occupies little space, has strong insulation capability and is easy to install and adjust; its performance complies with GB1985-89 "AC high-voltage disconnectors and earthing switches". It is suitable for indoor systems of rated voltage 10 kV, AC 50 Hz and below, for opening and closing circuits that are live but unloaded, and can be used together with high-voltage switchgear or independently.
Type Designation
| Code | Meaning |
|---|---|
| G | Disconnector |
| N | Indoor |
| 30 | Design No. |
| 12 | Rated voltage(kV) |
| (D) | With earthing device (GN30-12D) |
| □-□ | Rated thermal current (kA) / Rated current (A) |
Main Technical Parameters
Main technical parameters of the GN30-12 (original sample image; model as shown in the figure). The main technical parameters of the GN30-12 rotary indoor high-voltage disconnector are shown in the table above.
| Model | Rated voltage(kV) | Rated current(A) | 4 s rated short-time withstand current (r.m.s.) (kA) | Rated peak withstand current (kA) |
|---|---|---|---|---|
| GN30-12/S400-12.5 | 12 | 400 | 12.5 | 31.5 |
| GN30-12/S630-20 | 12 | 630 | 20 | 50 |
| GN30-12/S1000-31.5 | 12 | 1000 | 31.5 | 80 |
| GN30-12/S1250-31.5 | 12 | 1250 | 31.5 | 80 |
| GN30-12D/400-12.5 | 12 | 400 | 12.5 | 31.5 |
| GN30-12D/630-20 | 12 | 630 | 20 | 50 |
| GN30-12D/1000-31.5 | 12 | 1000 | 31.5 | 80 |
| GN30-12D/1250-31.5 | 12 | 1250 | 31.5 | 80 |
Outline & Installation Dimensions
Structure: two groups of insulators and contacts are fixed on the upper and lower planes of the three-phase common base, opening/closing by rotating the contact blade. The D-type earthing-knife structure of the GN30-12 rotary indoor HV disconnector meets the dual safety requirements of isolation and earthing.
Service Conditions
- Altitude not exceeding 1000 m;
- Ambient air temperature: upper limit +40℃, lower limit -10℃;
- Relative humidity: daily average not more than 95%, monthly average not more than 90%;
- Seismic intensity not exceeding degree 8;
- Free from sites with serious dust, chemically corrosive and explosive substances;
- Free from frequent violent vibration.
Related Products
High-voltage disconnectors of the same series and other types available:
- GN19-12/630A 1250A indoor high-voltage disconnector
- GN24-12D/630 Indoor High-voltage Disconnector
- GN22-12/2000A indoor high-voltage disconnector
- GN27-40.5/630A indoor high-voltage disconnector
- GW4-40.5/630A outdoor double-column horizontal-opening high-voltage disconnector
- GW5-40.5/630A outdoor double-column V-type high-voltage disconnector
- GW9-12/630A outdoor high-voltage disconnector
