Fully air insulated switchgear of 12kV/24kV

Product overview

As the power industry evolves, the miniaturization of electrical equipment represents a key future trend and an urgent need for current power consumers. Miniaturized electrical equipment not only saves land and civil engineering costs but also reduces the use of greenhouse gases like sulfur hexafluoride (SF6), thereby meeting ecological and environmental protection requirements. Leveraging years of extensive experience in high-voltage electrical design and incorporating globally advanced technical design philosophies, our company has developed the latest The EoK-12/24 Fully air insulated switchgear This product is tailored for power utilities and enterprises pursuing high power supply reliability, advancing distribution automation upgrades, and operating in harsh environments. It serves not just as a simple line switch but as a critical component in building smart, resilient distribution grids.

Product Structure Analysis
The product structure of ROCKWELL RySec Compact physically embodies its integrated multi-function concept. Its design is sophisticated and clearly layered, primarily consisting of three core components: the upper circuit breaker module, the lower isolation/earthing switch module, and the integrated operating and interlocking mechanism.

Upper Structure: Circuit Breaker Module

1. Core Function: Undertakes the tasks of closing the circuit, carrying the load current, and interrupting fault currents.

2. Casing Material: Fabricated using epoxy resin casting, which provides outstanding electrical insulation strength and mechanical strength.

3. Arc Interruption Unit: Encapsulated within the casing are three vacuum interrupter chambers, the core interrupting components of the circuit breaker. These chambers efficiently and cleanly extinguish the arc at current zero-crossing points.

4. Insulating Medium: The chamber is filled with Pure air/N2 gas as the insulating medium, ensuring high insulation performance within a compact design.

Lower Structure: Isolation and Earthing Switch Module

1. Core Function: Provides physical isolation of the circuit (disconnector) and safe earthing of cables (earthing switch).

2. Structural Material: Crafted from epoxy resin casting, delivering exceptional electrical insulation strength and mechanical robustness.

3. Integrated Component: The lower housing incorporates a capacitive bushing, enabling connection to voltage indication equipment without the need for an additional, separate capacitive voltage divider within the switchgear.

Operating and Interlocking Mechanism

   The RySec is equipped with two independent yet mechanically interlocked operating mechanisms, ensuring logical and safe operation sequences.

• Circuit Breaker Operating Mechanism (EL Series)

1) Type: Spring-operated, trip-free mechanism.

2) Features:

a) Enables local (manual) or remote (electric) control via closing/opening coils and a motor.

b) Includes mechanical anti-pumping function to prevent repeated closing/latching under fault conditions.

c) Springs are charged during the closing operation, storing energy for rapid contact separation during tripping.

d) The mechanism is mechanically latched in the closed position and released by a separate trip signal, ensuring instantaneous opening independent of operator intervention.

• Disconnector/Earthing Switch Operating Mechanism (1S Series)

1) Type: Double-spring operating mechanism.

2) Features:

a) Provides two independent operating interfaces for disconnector and earthed switch operations, respectively.

b) The operating force

• Core Safety Structure: Mechanical Interlocking System

The most critical safety feature of the product structure is its built-in, non-bypassable mechanical interlocking system

1) Circuit Breaker-Disconnector Interlock

Prevents operation of the disconnector when the circuit breaker is in the closed position, avoiding load-breaking or making operations on the disconnector

2) Disconnector-Earthing Switch Interlock

Implemented via independent operating lever seats, ensuring:

a) The earthing switch can only be closed after the disconnector is fully open.

b) The disconnector can only be closed after the earthing switch is open

3) Cabinet Door Interlock

Mechanically linked to the switchgear door, ensuring:

a) The cable compartment door can be opened only when the disconnector is open and the earthing switch is closed (safely grounding the cable side).

b) When the door is open, the earthing switch is mechanically blocked from opening

Technical Parameters

Application Scenarios

The RySec Compact is an ideal choice for secondary distribution applications, particularly suited for:

1. Medium-sized distribution substations.

2. Protection of overhead lines or cables.

3. Switching of capacitor banks.

4. Motor protection.