Off-circuit Three Phase Linear Tap Changer：
-Used in mineral oil or silicon oil -Rated voltage 10KV-35KV
-Rated current from 63A-300A
-Tapping position:3-9
-Regulation 2.5% per position
Paremeter:
| Specifications | WST30 | |
| Phase number | Three-phases | |
| Connection mode | Central point (II) Neutral point (III) Terminal Point(I) | |
| Rated through current (A) | 30 | |
| Short-circuit capacity | Heat stableness current (KA/2s) | 0.7 |
| Dynamic stableness current (KA) | 1.8 | |
| Rated frequency | 50~60 | |
| Insulation level (KV) | Rated voltage (KV) | 10KV |
| Power-frequency withstand Voltage (50Hz/1min) |
42KV | |
| Impulse (1.2/50μs) | 75KV | |
| Sealing performance (KPa/24h) | 60 | |
| Machine life (Thousands of times) | 2 | |
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