Item | Specification | CVIII350Y | CVIII350D | CV350 | SVIII500Y | SVIII500D | CV700 |
1 | Max. rated through-current (A) | 350 | 500 | 700 |
2 | Rated frequency (Hz) | 50 or 60 |
3 | Number of poles | 3 | 3 | 1 | 3 | 3 | 1 |
| 4 | Connection | Y-in the neutral, D and single pole-in any part of the winding |
5 | Max. rated step voltage (V) | 10 contacts | 1500 | 1500 | 1500 |
12 contacts | 1400 | 1400 | 1400 |
14 contacts | 1000 | - | 1000 |
6 | Rated step capacity (kVA) | 10 contacts | 525 | 400-525* | 660 |
12 contacts | 420 | 325-420* | 520 |
14 contacts | 350 | - | 450 |
7 | Short-circuit current test (kA) | Thermal (3s) | 5 | 7 | 10 |
Dynamic (Peak) | 12.5 | 17.5 | 25 |
8 | Max. Operating Positions | Without change-over selector | 14 | 12 | 14 |
With change-over selector | 27 | 23 | 27 |
9 | Insulation to ground (kV) | Highest voltage for equipment Um | 40.5 | 72.5 |
Rated separate source AC withstand voltage (kV/50Hz,1min) | 85 | 140 |
Rated lightning impulse withstand voltage (kV,1.2/50μs) | 225 | 350 |
10 | Internal Insulation Level | Refer to Technical Data section 4.6 |
11 | Mechanical life | Not less than 800,000 operations |
12 | Contact life | Not less than 200,000 operations |
13 | Oil compartment of diverter switch | Service pressure | 0.03Mpa |
Leakage test | No leakage under 0.08Mpa for 24 hours |
Over pressure protection | Bursting cap busts at 300 ± 20%kPa |
Protection relay | Oil flow speed set at 1.0m/s ±10% |
14 | Motor drive unit | SHM-D or CMA7 |
15 | Oil filter plant | ZXJY-1 / ZXJY-2 / ZXJY-3 according to requirement (Necessary when max. rated through current is 1000A and above or OLTC used for industrial applications) |