Item | Specification | CMⅢ 500Y CMⅠ500 | CMⅢ 600Y CMⅠ600 | CMⅠ800 | CMⅠ1200 | CMⅠ1500 |
1 | Max. rated through-current (A) | 500 | 600 | 800 | 1200 | 1500 |
2 | Rated frequency (Hz) | 50 or 60 |
3 | Connection | Three-phases for neutral point of star connection Single-phase for any selectable winding connection |
4 | Max. rated step voltage (V) | 3300 |
5 | Rated step capacity (kVA) | 1400 | 1500 | 2000 | 3100 | 3500 |
6 | Short-circuit current test (kA) | Thermal (3s) | 8 | 8 | 16 | 24 | 24 |
Dynamic (Peak) | 20 | 20 | 40 | 60 | 60 |
7 | Max. Operating Positions | Without change-over selector | 18 (special linear regulation can be up to 34) |
With change-over selector | 35 (special multiple coarse regulation can be up to 107) |
8 | Insulation to ground (kV) | Highest voltage for equipment Um | 72.5 | 126 | 170 | 252 |
Rated separate source AC withstand voltage (kV/50Hz,1min) | 140 | 230 | 325 | 460 |
Rated lightning impulse withstand voltage (kV,1.2/50μs) | 350 | 550 | 750 | 1050 |
9 | Tap selector | 4 grades of B, C, D and DE according to insulation level |
10 | Mechanical life | Not less than 800,000 operations |
11 | Contact life | Not less than 200,000 operations |
12 | Oil compartm-ent 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% |
13 | Motor drive unit | SHM-D or CMA7 |
14 | Oil filter plant | ZXJY-1 /ZXJY-2 /ZXJY-3 according to requirement |