It means Air-Insulated. The air is used at these switchgears around bus-bars within voltage range (1-36kv). Entire main equipment of AIS switchgear is in contact with their surrounding air. Structure of this kind of switchgear, including several isolated units (cells), is put together.
| NOTE | Specifications |
ROW |
| COMPACT FIXED(C.F) |
Name of Switchgear | 1 |
| Standing | Type of switchgear |
2 |
| 20KV |
Nominal voltage |
3 |
| 50HZ | Nominal frequency |
4 |
| 630A | Nominal current |
5 |
| 3 | Number of system phases | 6 |
| 24KV | System maximum voltage |
7 |
| IEC62271 | Production standard |
8 |
| IP 2X – as per IEC60259 Standard | Protection degree |
9 |
| Bottom | Access to input and output cables |
10 |
| One-way (of front) |
Switchgear access |
11 |
| 75-100 | Power key cell | 12 |
Dimensions of switchgear |
75 Calibration instruments | 13 |
| 50 Riser cell | 14 | |
| 75 Bus-coupler cell | 15 | |
|
Under-load breakable sectioner cell 50-37.5 |
16 | |
| 50 Fusible sectioner cell | 17 | |
| 90-100 Depth (cm) | 18 | |
| 165 Height (cm) | 19 | |
| RAL 7032-7035 | Color (front gate) | 20 |
| * | Potential for automation | 21 |
| 16 KA-25kv |
Minimum nominal current of IK short circuit | 22 |
| 1s-3s | Minimum nominal time for short circuit (TK) | 23 |
| (16KA)2.5 equal to IK | The minimum nominal peak withstand current | 24 |
| Contact at contact at closed mode: 125 KVPN Contact at open mode: 145 KVP |
Minimum voltage tolerance against thunder impact | 25 |
| Contact at closed mode: 50 kv Contact at open mode: 60 kv |
Minimum voltage tolerance at network frequency for one minute | 26 |
| Galvanized | Type of body cover |
27 |
| 2Mm | Diameter of plate |
28 |
| Vacuum-gas | Type of power keys (circuit breaker) | 29 |
| Sf6 gas | Type of sectioner | 30 |