12kV Indoor Disconnect Switch

Dongfa Intelligent supplies the 12kV Indoor Disconnect Switch for indoor medium-voltage switchgear. The GN30-12 series is available in 2000A, 2500A, and 3150A configurations, with 4s short-time withstand current of 40kA or 50kA, peak withstand current of 100kA or 125kA, and main-circuit resistance of 25μΩ, 20μΩ, or 12μΩ.

Core Advantages

Three Rated Current Options

The GN30-12 series provides 2000A, 2500A, and 3150A rated working current options for different 12kV switchgear configurations. This range allows the 12kV Indoor Disconnect Switch to match different continuous current requirements.

Low Main-Circuit Resistance

Main-circuit resistance is 25μΩ for the 2000A version, 20μΩ for the 2500A version, and 12μΩ for the 3150A version.

High Short-Time and Peak Withstand Current

The 2000A and 2500A versions provide 40kA 4s short-time withstand current and 100kA peak withstand current. The 3150A version provides 50kA 4s short-time withstand current and 125kA peak withstand current.

Rotating Contact Structure

The GN30-12 series uses a rotating contact structure. When opened, the contacts form a visible isolation gap for maintenance isolation.

12kV Indoor Switchgear Isolation

The 12kV Indoor Disconnect Switch is used for main-circuit isolation in indoor medium-voltage switchgear. It provides an isolation point for maintenance and is not designed to interrupt load current or short-circuit current.

Typical Applications

1. Distribution and feeder cabinets: 2000A or 2500A configurations.
2. Main transformer incoming cabinets: 3150A configuration.
3. Busbar section cabinets: 2500A or 3150A configurations.
4. Industrial distribution systems: Main-circuit isolation in 12kV distribution rooms.
5. Replacement and retrofit projects: Replacement of existing disconnect switches after dimensional and electrical confirmation.

Technical Specifications & Selection Guide

Three Configuration Comparison

Installation Dimensions Reference

1.2/2500 5 0 0 0 0 7 0 5 M16 12/3150 5 0 0 0 0 7 0 5 M16 Note: L, L1, L2, and A have two dimension options. Confirm the required dimensions according to the actual switchgear layout before installation.

Key Selection Parameters

1. Rated Working Current: 2000A / 2500A / 3150A.
2. 4s Short-Time Withstand Current: 40kA / 50kA.
3. Rated Peak Withstand Current: 100kA / 125kA.
4. Main-Circuit Resistance: 25μΩ / 20μΩ / 12μΩ.
5. Installation Dimensions: L, L1, L2, A, B, C, D, and E.
6. Mounting Thread: M16.

Replacement Project Information

For replacement projects, provide the original disconnect switch model, mounting dimension drawings, rated current, short-time withstand current, switchgear information, and required quantity for compatibility confirmation.

Manufacturing & Quality Assurance

Factory & Production Capacity

2,000 m². It has 17 employees, including 4 technical engineers, with 2 production lines and 1 set of testing equipment. Monthly production capacity is approximately 600-700 units, with annual capacity of approximately 7,000-8,000 units.

Certifications & Testing

The company holds ISO 9001, ISO 14001, and ISO 45001 certifications. Products comply with applicable GB standards and IEC 62271 requirements. Core products are supported by type test reports. Factory testing includes resistance testing, mechanical operation testing, and withstand voltage testing.

Delivery & Technical Support

1. Standard Products: 7-15 working days.
2. Custom Products: 15-30 working days.
3. MOQ: 1 unit for standard products.
4. Technical Response: Within 1 working day.
5. After-Sales Support: 24 hours.

FAQ

Q1: What is the difference between a disconnect switch and a circuit breaker?

A disconnect switch provides circuit isolation and a visible disconnection point for maintenance. It is not designed to interrupt load current or short-circuit current. Circuit breakers are used for current interruption and protection.

Q2: What does 12μΩ main-circuit resistance mean?

12μΩ is the specified main-circuit resistance for the GN30-12/3150-50 configuration. The corresponding resistance values for the 2000A and 2500A versions are 25μΩ and 20μΩ.

Q3: How do I choose between 2000A, 2500A, and 3150A?

Select the rated working current according to the continuous load current and switchgear design. The required short-time withstand and peak withstand currents should also match the system requirements for the 12kV Indoor Disconnect Switch.

Q4: What is the difference between 40kA and 50kA short-time withstand current?

The 2000A and 2500A configurations provide 40kA for 4s, while the 3150A configuration provides 50kA for 4s. Selection should be based on the calculated system short-circuit current.

Q5: How should the installation dimensions be confirmed?

Confirm L, L1, L2, A, B, C, D, and E against the switchgear layout. For replacement projects, the original mounting drawing is recommended.

Q6: What information is required for a quotation?

Please provide the rated working current, short-time withstand current, installation dimensions, switchgear information, and quantity. For replacement projects, the original model and drawings are recommended when selecting the 12kV Indoor Disconnect Switch.

Request a Quote

Please provide the rated current, short-time withstand current, installation dimension requirements, switchgear information, and quantity for product selection and quotation.