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| Categories | Switches，Switching Mechanisms & Accessories |
|---|---|
| Model Number: | FLN36-24D/T630-20-230 |
| Brand Name: | Changyun |
| Certification: | ISO |
| Place of Origin: | China |
| Company Info. |
| Jiangsu Changyun Intelligent Technology Co., Ltd |
| Verified Supplier |
| View Contact Details |
| Product List |
The Changyun Intelligent FLN36-24D/T630-20-230 SF₆ Load Break Switch (LBS) is a high-performance medium-voltage switching device designed for 24kV, three-phase AC 50Hz distribution systems. Utilizing SF₆ gas as the insulation and arc-extinguishing medium, it provides excellent electrical insulation, reliable load switching performance, and long-term operational stability.
Designed for ring main units (RMUs), compact substations, pad-mounted substations, and industrial power distribution systems, the FLN36-24D series is capable of switching normal load currents, closed-loop currents, transformer magnetizing currents, and cable charging currents. Its compact structure, low maintenance requirements, and high mechanical endurance make it an ideal solution for modern medium-voltage distribution networks.
The switch is equipped with a spring-operated mechanism, pressure gauge, and comprehensive anti-misoperation mechanical interlocking system to ensure safe and reliable operation. Optional motor-operated mechanisms are available for remote operation and distribution automation applications.
Manufactured under a strict quality management system, the FLN36-24D complies with IEC 62271-103:2021, IEC 62271-102:2022, and relevant SPLN03.0201-1.2019 technical specifications, making it suitable for utility, industrial, commercial, and renewable energy projects.
The FLN36-24D is designed to safely make and break normal load currents, closed-loop currents, transformer no-load currents, and cable charging currents, ensuring reliable operation in medium-voltage distribution networks.
The sealed SF₆ gas chamber provides outstanding insulation and arc-extinguishing capability while maintaining stable performance throughout the product's service life.
Its compact structure allows easy installation in Ring Main Units (RMUs), compact substations, prefabricated substations, and other space-constrained applications.
The switch incorporates a complete anti-misoperation mechanical interlocking system that enhances operator safety and prevents incorrect switching operations.
Motor-operated mechanisms can be supplied to support remote operation, SCADA systems, and distribution automation projects.
The sealed gas tank minimizes maintenance requirements while providing long-term operational reliability and low lifecycle costs.
Choosing the Changyun Intelligent FLN36-24D Load Break Switch provides several advantages:
The FLN36-24D Load Break Switch uses SF₆ gas as both the insulation and arc-extinguishing medium. During switching operations, the contacts open and close inside the sealed gas chamber, where the SF₆ gas rapidly extinguishes the electrical arc and restores insulation between the contacts.
The switch is capable of safely interrupting normal load currents, transformer magnetizing currents, and cable charging currents without damaging the contacts. When integrated into a Ring Main Unit, it enables reliable sectionalizing and load transfer while ensuring continuous power supply within the distribution network.
Optional motor-operated mechanisms allow remote switching and seamless integration into modern distribution automation systems.
The FLN36-24D SF₆ Load Break Switch is widely used in:
The FLN36-24D Load Break Switch is designed for reliable operation under the following conditions:
The FLN36-24D is designed and manufactured in accordance with internationally recognized standards, including:
Each unit undergoes comprehensive factory testing before shipment to ensure consistent quality, electrical performance, and operational reliability.
| NO. | Item Name | Unit | Parameter | |
|---|---|---|---|---|
| 1 | Rated Voltage | kV | 24 | |
| 2 | Rated Current | A | 630 | |
| 3 | Rated Frequency | Hz | 50 | |
| 4 | 1min Power Frequency Withstand Voltage | kV | Phase-to-phase, Phase-to-ground, Switch Break: 50 / Isolation Break: 60 | |
| 5 | Lightning Impulse Withstand Voltage | kV | Phase-to-phase, Phase-to-ground, Switch Break: 125 / Isolation Break: 145 | |
| 6 | Rated Short-time Power Frequency Withstand Voltage of Auxiliary and Control Circuits | kV | 2 | |
| 7 | Rated Active Load Breaking Current | A | 630 | |
| 8 | Rated Closed-loop Making and Breaking Current | A | 630 | |
| 9 | Rated Cable Charging Breaking Current | A | 16 | |
| 10 | Rated Short-circuit Making Current | kA | 50 | |
| 11 | Rated Short-time Withstand Current and Duration | kA/s | 20-1 | |
| 12 | Mechanical Endurance | Times | SF₆ Load Switch / Earthing Switch 5000/2000 | |
| 13 | Circuit Resistance | μΩ | ≤65 | |
| 14 | Rated SF₆ Gas Pressure (at 20℃) | kPa | 40～60 (see specific product requirements) | |
| 15 | Minimum Functional Pressure (at 20℃) | kPa | 20 | |
| 16 | Rated Voltage of Motor | V | DC 48 | |
| 17 | Annual Leakage Rate of Gas Tank Sealing Test | ≤0.025% | ||
| 18 | SF₆ Gas Moisture Measurement Test (at 20℃) | μL/L | ≤200 | |
| 19 | Partial Discharge (1.1Ur) | pC | ≤20 | |
| No. | Item Name | Unit | Parameter | |
|---|---|---|---|---|
| 1 | Center Distance Between Poles | mm | 230±1 | |
| 2 | Three-phase Opening and Closing Asynchronism | ms | ≤5 | |
| 3 | Average Opening Speed (6ms after Opening) | m/s | >3.2 | |
| 4 | Average Closing Speed (6ms before Closing) | m/s | >3.2 | |
| 5 | Opening Time | ms | 20-70 | |
| 6 | Maximum Torque for Manual Operation | N.m | 160 | |
| No. | Item Name | Unit | Parameter | |
|---|---|---|---|---|
| 1 | Rated Voltage | V | DC 48 | |
| 2 | Rated Closing Energy Storage Operation Time | S | ≤10 | |
| 3 | Motor Power | W | 60 | |
| 4 | Opening Coil Resistance | Ω | 6 | |
An SF₆ Load Break Switch is a medium-voltage switching device designed to make and break normal load currents. It uses SF₆ gas as the insulation and arc-extinguishing medium, providing reliable switching performance, compact dimensions, and long service life for power distribution systems.
A Load Break Switch is designed for switching normal load currents and isolating circuits during maintenance, while a Circuit Breaker can interrupt both normal load currents and fault currents. In many Ring Main Units, both devices are used together to provide complete protection and operational flexibility.
Yes. The FLN36-24D is specifically designed for integration into Ring Main Units (RMUs), compact substations, and pad-mounted substations, providing reliable load switching and distribution network control.
Yes. Changyun Intelligent offers OEM and ODM services, including customized operating mechanisms, motor voltages, panel configurations, branding, nameplates, packaging, and technical documentation according to customer requirements.
The standard production lead time is generally 20–35 days, depending on the order quantity and customization requirements.
Yes. We provide technical consultation, product selection assistance, installation guidance, operation manuals, troubleshooting support, and after-sales service to help customers achieve reliable long-term operation.
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