11KV Medium Voltage RMU Electrical Panels

Product Model

What are the advantages of the ring main unit HGNX17-12 compared to the medium-voltage switchgear KYN28-12?

Comparing with the KYN28-12 armored withdrawable metal-clad switchgears, the HXGN17-12 ring main units have very significant advantages in compact size, lower cost, ease of maintenance, and environmental adaptability, so the HXGN17-12 11KV Medium Voltage RMU Electrical Panels are particularly suitable for end‑user distribution scenarios where space is tight, budgets are limited, and high power supply reliability is required.

The main advantages of HXGN17-12 over KYN28-12 are as follows:

1. Lower initial investment: The HXGN17-12 ring main unit is generally much lower in cost, giving it a clear economic advantage in budget‑constrained projects. In addition, its structure is simpler, which reduces the failure rate and also reduces long-term operating and maintenance costs.

2. Compact size and flexible installation: The HXGN17-12 RMU volume is far smaller than that of the KYN28-12 medium-voltage switchgear. The compact layout and the ability to be mounted against a wall make it much more adaptable in locations where installation space is limited.

3. Simpler routine maintenance: HXGN17-12 usually has a fixed‑type construction – the main switching elements are fixed‑mounted, making the structure simple and reliable.Compared with the RMUs, the KYN28-12 uses a withdrawable (truck) type construction, which offers good interchangeability but adds complexity and potential failure points, and also requires higher technical skills from maintenance personnel.

4. Better environmental adaptability: Due to the HXGN17-12 shell is fully enclosed, its proction grade typically achieves a protection rating of IP2X or higher, so the ring main units can provide stronger resistance to dust, moisture, and pollution. This ensures more stable operation in harsh environments.

Key differences and selection advice

The limited protection characteristic of ring main units

It is important to note that the HXGN17-12 ring main unit is primarily intended for load distribution. Its main protection element is usually a "load switch + fuse" combination. This arrangement can quickly interrupt short‑circuit faults, but it lacks comprehensive relay protection functions (such as overcurrent and instantaneous overcurrent protection) and is therefore unsuitable for applications that require sophisticated relay protection.

Selection advice

In summary, the choice between the two depends on specific needs:

If the project budget is limited, installation space is scarce, and the distribution terminal is located in a harsh environment, the HXGN17-12 11KV Medium Voltage RMU Electrical Panels are an economical and practical choice.

If the project has a generous budget and requires high current carrying capacity, high breaking capacity, and complete relay protection, KYN28-12 is more suitable.

Main technical parameters

Appearance and Dimension

How to order or buy

1.Basic purchasing information:Please provide the complete type of the Ring main units or switchgears, quantity, and your expected delivery date.

2.What drawings during our technical comunication:

The following drawings must be submitted together before the offer:

Single-line diagram of the primary system,

Schematic diagram of the secondary (control) circuits, and

Layout diagram showing the arrangement of the switchgear units.

3.Electrical ratings and component specifications – Clearly state the rated current of the main busbar, as well as the type and rating of each component (e.g., circuit breakers, load switches, fuses, current transformers, etc.) to be installed in the switchgear.

4.Special requirements – Any additional technical or non‑standard requirements (e.g., special coatings, different protection degree, specific accessory devices, or environmental conditions) shall be explicitly described.