Description
Product Overview
IXR B-24/630-20 series pure air/nitrogen (environmentally friendly gas) insulated switchgear from the design project, R&D, and test verification, to mass production, optimization, and upgrading has been nearly ten years, in the domestic switching field of senior experts, several joint development of the joint efforts of enterprises in the mechanical life of the product, partial discharge, insulation strength, weathering performance, arc-firing level of several aspects with significant advantages.
We attach great importance to product quality and the manufacturing process, and we treat every link of product production with the heart of fine craftsmanship. Only the insulating gas compares heated dry air, nitrogen, carbon dioxide, and pure air, and pure air with extremely low moisture content and high purity is chosen as the preferred insulating gas for replacing SF6. The core switch unit of IXR B-24/630-20 series products adopts the new vacuum interrupter soft package casting process, together with the well-designed rotary three-position switch, the overall structure is simple and compact: the pure air is used to replace SF6 in the fully sealed gas box, and with the advantageous electric field distribution design, the local discharge of the whole cabinet is lower than 5pC; the zinc. The nickel alloy surface treatment process of the actuator has a salt spray resistance of more than 168 hours, and its maximum service life is up to 30.000 times.
The products are continuously optimized and improved by widely absorbing feedback during the process of product use and have formed a diversified product portfolio with more than ten specifications of four series, including different current levels of 630A and 1250A, different structural types of upper isolation and lower isolation and lower grounding, and different specifications of compact and standardized sizes.
Technical parameters
| No. | Description | Unit | numerical | ||
| 1 | Rated voltage(Ur) | kV | 24 | ||
| 2 | Rated frequency(fr) | Hz | 50 | ||
| 3 | Rated current(Ir) | A | 630 | ||
| 4 | Rated insulation level | Rated frequency withstand voltage(effective value)1min | Relatively, inter-phase | kV | 50 |
| Isolation/vacuum disconnect | 60 | ||||
| Rated lightning impulse withstand voltage Up(peak value) |
Relatively, inter-phase | 125 | |||
| Isolation/vacuum disconnect | 145 | ||||
| Auxiliary and control circuits 1min | 2 | ||||
| 5 | Rated short-time withstand current | main circuit | kA | 20/21 | |
| grounding circuit | 20/21 | ||||
| 6 | The rated peak withstand the current | main circuit | kA | 50/52.5 | |
| grounding circuit | 43.5 | ||||
| 7 | Rated short circuit duration | main circuit | S | 4 | |
| grounding circuit | 4 | ||||
| 8 | Rated short-circuit closing current | kA | 50 | ||
| 9 | Rated short-circuit breaking current(ISC) | kA | 20/21 | ||
| 10 | Rated cable\line charge break test | C2 | |||
| 11 | electric life | circuit breaker(E2) | time | 30 | |
| Rated short-circuit shutdown current of the grounding switch | kA | 50/52.5 | |||
| Rated number of short-circuit closures of the grounding switch(E2) | time | 5 | |||
| 12 | Heterophase ground fault breaking current | kA | 17.4 | ||
| 13 | Rated sequence of operation | 0-0.3s-co-180s-co | |||
| 14 | Mechanical operations | Mechanical life of circuit breaker(M2) | time | 10000 | |
| Mechanical life of disconnecting switches(M1) | 5000 | ||||
| Mechanical life of grounding switches(M1) | 5000 | ||||
| 15 | Annual gas leakage rate | year | ≤0.01% | ||
| 16 | Rated filling level (Pre) for insulation (20°C, relative pressure) | MPa | 0.02 | ||
| 17 | Internal Arc Class (IAC) Ratings | Types of permissible exposure | / | A | |
| Types of panels | / | FLR | |||
| Rated arc fault current（IA，IAe） | kA | 20/21 | |||
| Rated Arc Fault Duration（tA，tAe） | S | 1 | |||
| 18 | Partial discharge measurement (switchgear) | pC | ≤10 | ||
| 19 | LSC category | / | LSC2 | ||
| 20 | Gases for insulation | / | dry air | ||
| 21 | protection class | gas tank(IP) | / | IP67 | |
| cabinet(IP) | / | IP4X | |||
| cabinet(IK) | / | IK07 | |||
| 22 | circuit resistance | main circuit | μΩ | ≤140 | |
| 23 | Constant supply voltage (Ua) for switching and closing devices and auxiliary and control circuits | V | V | DC48\DC220 | |
| 24 | Three-position switch position | Upper three positions | |||
