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Manufacturer guarantees product against defects; repair or replacement is at manufacturer's discretion. Improper handling voids warranty.
Step-by-step instructions for correctly closing the switchgear door.
Procedure for opening the earthing switch using the operating handle.
Instructions for charging the spring mechanism, either manually or via motor.
Guide to closing the Load Break Switch (LBS) using manual controls.
Procedure for opening the Load Break Switch (LBS) using manual controls.
Instructions for closing the earthing switch via the lever mechanism.
Step-by-step instructions for safely opening the switchgear door.
Manufacturer guarantees product against defects; repair or replacement is at manufacturer's discretion. Improper handling voids warranty.
Step-by-step instructions for correctly closing the switchgear door.
Procedure for opening the earthing switch using the operating handle.
Instructions for charging the spring mechanism, either manually or via motor.
Guide to closing the Load Break Switch (LBS) using manual controls.
Procedure for opening the Load Break Switch (LBS) using manual controls.
Instructions for closing the earthing switch via the lever mechanism.
Step-by-step instructions for safely opening the switchgear door.
The Ulusoy URING12-24 - LLF - SF6 Insulated Compact RMU Switchgear with Fuse is a sophisticated ring main unit designed for secondary distribution networks, offering a robust and reliable solution for various switching applications in 12/24 kV distribution systems. This device is engineered with a focus on safety, efficiency, and minimal maintenance, making it suitable for demanding operational environments.
The URING12-24 RMU serves as a crucial component in electrical distribution networks, facilitating the control and protection of power lines. Its primary function is to manage the flow of electricity, allowing for the connection, disconnection, and earthing of circuits. The unit is specifically designed as a 3-way system within a single SF6 tank, incorporating two incoming-outgoing units with Load Break Switches (LBS) and one transformer protection unit with a fuse combination. This configuration enables flexible power distribution and protection for transformers. The switching devices within the URING12-24 are three-positioning LBS, capable of close, open, and earthed operations, ensuring comprehensive control over the network. The design also allows for expansion up to a 5-way unit, either as extensible or non-extensible systems, providing adaptability to evolving network requirements.
The URING12-24 RMU is characterized by several key usage features that enhance its operational efficiency and user experience. The entire system is completely sealed within a stainless steel tank, which contains all live parts and switching functions immersed in SF6 gas. This sealed design maintains constant atmospheric conditions, contributing to a high level of reliability and personal safety.
Operation of the switchgear involves a clear sequence of steps, starting with ensuring the switchgear door is closed. To energize the system, operators must first check for any foreign objects and verify all connections. The process includes opening the earthing switch, charging the spring mechanism, and then closing the LBS. For de-energizing, the sequence involves opening the LBS and then closing the earthing switch before opening the switchgear door.
The unit incorporates visual indicators for critical states, such as voltage presence and earth switch position. Voltage indicator lights illuminate when input cables are powered, and when the disconnector and breaker are off in output switchgear. A phase conformity test can be performed using a serial light, which turns off if phases conform and on if they do not. Cable testing procedures are also outlined for both input and output switchgear, involving specific operations of the breaker, disconnector, and earthing disconnector, along with the use of a cable test device.
The switchgear is equipped with manual opening and closing buttons, a spring charging hole, and an earth switch operation hole, all designed for intuitive use. A manometer provides an indication of the internal gas pressure, which is crucial for monitoring the system's integrity. For remote operation, an optional remote controller button is available, enhancing convenience and safety.
Maintenance of the URING12-24 RMU is designed to be minimal due to its sealed and robust construction. However, certain procedures are essential to ensure its long-term performance and safety.
Before any assembly or maintenance work, it is paramount to isolate the system from high voltage and supply voltage, and to earth it. This precaution is critical to prevent mortal danger. Additionally, the circuit-breaker's energy storing device must be released through OFF-ON-OFF operation, and for make-proof earthing switches, by the appropriate ON-operation, to mitigate the risk of injury from movable parts in mechanical drives.
The manual emphasizes that after removing covers, operator safety regarding internal arcs may be reduced unless the switchgear is completely isolated from the power supply and earthed. Therefore, thorough isolation and earthing are crucial for any internal work.
Fuse replacement is a key maintenance task detailed in the manual. This process involves opening the switchgear door, inserting a handle and turning it anti-clockwise to access the fuse, removing the fuse, loosening a screw with a screwdriver to remove the blown fuse, replacing it with a new one (ensuring the striker pin looks upwards), and finally tightening the contact screw and applying silicon grease.
The device is built to withstand various environmental conditions, but proper storage is vital if the equipment is not immediately commissioned. It should be stored on dry ground or damp-proof insulating material in its original packaging, indoors, and within specified temperature and humidity ranges. After prolonged storage, all insulating parts must be carefully cleaned with a dry, lint-free cloth before commissioning.
The modular design of the switchgear also facilitates maintenance and expansion. Modular switchgear units can be combined using M8x30 bolts, but prior to assembly, silicon crossing bushings and contact holes must be thoroughly cleaned to ensure proper connection and sealing.
Overall, the URING12-24 RMU is engineered for high reliability and ease of use, with clear guidelines for both operation and essential maintenance, ensuring a safe and efficient power distribution solution.
General| Rated Voltage | 24 kV |
|---|---|
| Rated Current | 630 A |
| Insulation | SF6 Gas |
| Short-circuit Current | 25 kA |
| Operating Mechanism | Spring-operated |
| Mechanical Life | 10, 000 operations |
| Weight | 250 kg (approximate) |
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