| Brand | ROCKWILL |
| Model NO. | Indoor Air Insulated Sectionalizing Switch for Private Substation-25.8kV |
| Rated voltage | 25.8kV |
| Rated normal current | 200A |
| Series | ZW32 |
This switch is 3 phases Air insulated sectionalizer for indoor private substation lines operating at a voltage up to 25.8kV, cooperating excellently with Recloser.It has been newly designed compact type by Rockwill for light-weight and high reliability.It is used under 4,000kVA normally (in case of abnormal condition, under 2,000kVA).
Unique and Field Proven Puffer and Heavy duty Tulip-Shaped Contacts made of arc resistant Cu-W tip ensures short arc-extinguishing time and more than 100times load current capacity.The mechanism of very simple and reliable structure shows quick open and quick close operation with low tripping energy and is independent from operator's handling power or speed.
Control power supply is provided.(from 1 Phase AC220/110V to DC24V)You can see the on/off position of the main contacts directly, connected with the main shaft from the ground level.
| 1 | Nominal system voltage | kV | 22.9 |
| 2 | Rated maximum voltage | kV | 25.8 |
| 3 | Rated current | A | 200 |
| 4 | Rated frequency | Hz | 50/60 |
| 5 | Rated short-time withstand current (1s sym) | kA | 10 |
| 6 | Short-time withstand current (10s sym) | kA | 3.5 |
| 7 | Short-time withstand current (instantaneous asym) | kA | 15 |
| 8 | Rated short-circuit making current (peak) | kA | 25 |
| 9 | Rated load breaking current | A | 900 |
| 10 | Max overloading current | A | 800 |
| 11 | Minimum operating current (phase) | A | 10/20/30/50/70/100/140/200 (BLOCK) |
| 12 | Minimum operating current (ground) | A | 5/10/15/25/35/50/70/100 (BY-PASS) |
| 13 | Power frequency withstand voltage (1min) | kV | 50/60 |
| 14 | Lightning impulse withstand voltage (1.2×50μs) | kV | 125/145 |
| 15 | Mechanical endurance (no-load) | times | 1000 |
| 16 | Inrush current restraint time | s | 0.5/1.0 |
| 17 | Control voltage | V | 1-phase AC 220V / DC 24V |
| 18 | Operation mode | — | Automatic (local control) |
| 19 | Weight | kg | 65 |
| 20 | Applied standard | — | KEMC 1126 |
| Parameter | Condition |
|---|---|
| Ambient temperature (indoor) | −5°C to +40°C |
| 24h average temperature | ≤35°C |
| Altitude | ≤1000 m |
| Relative humidity (daily avg) | ≤95% |
| Relative humidity (monthly avg) | ≤90% |
| Water vapor pressure (daily avg) | ≤2.2 kPa |
| Water vapor pressure (monthly avg) | ≤1.8 kPa |
| Pollution level | Class II (min) |
| Installation | Indoor |
Adopting field‑proven puffer design and heavy‑duty tulip‑shaped contacts with arc‑resistant Cu‑W tips. It achieves short arc‑extinguishing time and can withstand more than 100‑times load‑current switching operations.
Multiple control‑power‑supply options are supported, ranging from single‑phase AC 220 V / 110 V down to DC 24 V for project‑site selection.
Yes. The position indicator is directly coupled to the main shaft, so main‑contact on‑off status can be visually checked from ground level.
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