11KV Isolating Mechanism for Medium Voltage Indoor Panels

The 11KV Isolating Mechanism For Medium Voltage Indoor Panels is an isolated operating mechanism which is used for the opening and closing operations of disconnect switches and grounding switches within eco-friendly gas-insulated switchgear (GIS). This operation mechanism of switch disconnector uses a spring energy storage system to drive the disconnect switch, and the compression spring over-center energy storage mechanism controls the grounding switch operations. This switch disconnector operation mechanism has features of three distinct working positions: Closed (ON), Open (OFF), and Grounded (EARTH). The operating mechanism has five-prevention mechanical interlocking function to ensure operational safety and sequence compliance.

Model and meaning

Technical Specifications

How to properly operate this product?

All operations of the KDSGM-12D/630-20 11KV Isolating Mechanism For Medium Voltage Indoor Panels are performed using a dedicated hexagonal handle inserted into the corresponding drive shaft.

1. Closing the Disconnect Switch

Ensure the panel grounding switch is in the OFF position.

Insert the handle into the hexagonal shaft on the right side of the mechanism.

Rotate approximately 90°counterclockwise to close the disconnect switch.

When the disconnect switch is CLOSED, the grounding switch port is blocked by an indicator plate, preventing unsafe operation.

2. Opening the Disconnect Switch (OFF)

Insert the handle into the hexagonal shaft on the upper side of the mechanism.

Rotate approximately 90° clockwise to open the disconnect switch.

Once OPEN, the operator can either close the disconnect switch again or operate the grounding switch.

3. Operating the Grounding Switch

Only permitted after the disconnect switch is fully OPEN.

Insert the handle into the hexagonal shaft on the left side of the mechanism.

Rotate 90° clockwise to close the grounding circuit, or 90° counterclockwise to open it.

When the grounding switch is CLOSED, the disconnect switch port is blocked, maintaining interlock integrity and ensuring safe operation.

Key Safety Features

Five-Prevention Interlocking: Prevents accidental grounding of a live circuit or energizing a grounded circuit.

Visual Indicators: Clearly show switch positions to the operator.

Sequential Operation Enforcement: Ensures the disconnect switch and grounding switch are always operated in the correct order.

Appearance and Dimension

Application Scope

This 11KV Isolating Mechanism For Medium Voltage Indoor Panels is specifically designed as a matched component for three-position (ON-OFF-EARTH) isolation and grounding switches installed in medium-voltage, environmentally friendly gas-insulated ring main units (RMUs) and switchgear panels. It is suitable for applications requiring strict safety interlocks and reliable spring-operated switching in utility, commercial, and industrial power distribution systems.

FAQ

Q1: What is the correct operational sequence between for the disconnect switch and the grounding switch?

A: The safety interlocks must be enforced a strict sequence. The earthing switch can only be operated (closed or opened) after the disconnector switch is fully OPEN.The disconnector may only be operated once the grounding switch is fully open.Adherence to this sequence prevents the hazardous closure of the grounding switch onto an energized live circuit.

Q2: How does the "five-prevention interlocking function" work for this operation mechanism?

A: The interlocking function operates primarily through a mechanical design. when the disconnect switch or the grounding switch is in the CLOSED position, the physical barrier plate will block the operating shaft of the opposing switch. This isolating mechanism will ensure important safety operations are prevented, including the grounding of a live circuit, the energizing of a grounded circuit, and access to compartment interiors while equipment is energized.

Q3: Which standards does this 11KV Isolating Mechanism For Medium Voltage Indoor Panels comply with?

A: The Medium Voltage Indoor Panels is manufactured and fully tested in compliance with the Chinese national standard GB/T 1985-2023 "High-voltage alternating-current disconnectors and earthing switches" and other relevant technical specifications for switchgear components.

Q4: Is the operating handle universal for all operations?

A: Yes, a single dedicated hexagonal handle is used for all operations. However, it can only be inserted into the specific operating shaft that is not blocked by the interlock indicator plate at any given time, thereby enforcing the correct procedure.

Q5: How can the operator visually confirm the current position of the switches?

A: The mechanism incorporates a clear position indicator. Furthermore, the interlock system provides a direct visual cue: if an operating port is covered by the indicator plate, the corresponding switch is in the CLOSED position, and the alternate switch is safe to operate (if its port is accessible).

Why Choose Cotenele Products?

In-house Manufacturing: Owns over 30, 000 square meters of factory space and is ISO9001, ISO14001, and ISO45001 certified.

Reliability: Used in numerous power, metro, petrochemical, and industrial projects.

Rapid Customization: Provides OEM/ODM services for switchgear manufacturers.

Environmental Innovation: Focuses on environmentally friendly GIS components.

Technical Expertise: An experienced engineering team ensures product safety, accuracy, and durability.

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