GN24-12 Indoor High-Voltage Disconnector | Reliable Power Isolation | Chennuo Electric-Chennuo Electric Technology Group Co., Ltd

Parameter

Projects	400A 630A				1000A				1250A				Mounting hole size
Specifications and models	A	B	C	D	A	B	C	D	A	B	C	D	Mounting hole size
GN24-12D I	890	660	450	125	890	690	480	125	890	700	500	125	700×300
GN24-12D Ⅱ	890	660	450	125	890	690	480	125	890	700	500	125
GN24-12D I	890	660	450	240	890	690	480	350	890	700	500	350
GN24-12D II C	890	660	450	240	890	690	480	350	890	700	500	350
GN24-12D I	920	780	450	125	920	790	480	125	920	790	500	125
GN24-12D III C	920	780	450	240	920	790	480	350	920	790	500	350

Operating Environment Conditions

1. Altitude: No more than 1000 meters;

2. Ambient air temperature: No higher than +40°C and no lower than -25°C;

3. Ambient relative humidity: Daily average not exceeding 95%, monthly average not exceeding 90%;

4. Seismic intensity not exceeding 8 degrees;

5. No fire, explosion hazards, severe pollution, chemical corrosion, or severe vibration in the environment.

Typical Application Scenarios:

Indoor Switchgear Panels (KYN28, etc.): Integrated as primary isolating units within medium-voltage metal-clad switchgear assemblies.
Power Plants & Substations: Deployed in 10kV to 40.5kV transformer substations to establish a clear, safe visible break during circuit disconnections.
Industrial & Mining Enterprises: Used in heavy industrial plant distribution rooms to protect maintenance personnel by safely isolating sections of the power network.
Municipal Infrastructure & Commercial Complexes: Applied in urban ring main units and indoor distribution stations requiring reliable, space-saving safety isolation.

Core Advantages & Features:

Visible Isolation Gap for Maximum Safety: Provides a distinct, reliable physical break in the open position, ensuring absolute safety for technicians performing downstream maintenance.
Robust Mechanical Interlocking System: Features reliable mechanical interlock provisions to prevent misoperation (such as opening or closing under load), safeguarding both operators and primary assets.
Low-Resistance Current-Carrying Design: Main contacts and conductive paths are manufactured from high-purity electrolytic copper with silver-plating options, minimizing temperature rise and power loss during continuous full-load operations.
High-Grade Insulation Performance: Utilizes superior epoxy resin insulators and porcelain components offering high creepage distances, preventing flashovers in confined indoor environments.
Flexible Installation & Configuration: Available in multiple structural variations (with or without grounding switches) to match diverse switchgear cabinet dimensions and client layouts.

Why Choose Chennuo Electric?

Comprehensive Voltage Coverage (10kV – 40.5kV): One-stop sourcing platform for all medium-to-high voltage indoor isolation requirements, reducing your supply chain complexity.
Rigorous Quality Control & Testing: Every disconnecting switch undergoes strict factory inspections, including mechanical endurance tests, voltage withstand tests, and circuit resistance measurements.
Global Project Experience: Proven track record of supplying robust electrical equipment to power distributors, EPC contractors, and industrial importers across international markets.
Customization & Engineering Support: Flexible manufacturing capabilities to accommodate special terminal dimensions, custom mounting brackets, or specific seismic and environmental requirements.

Frequently Asked Questions (FAQ)

Q1: What is the main function of an indoor disconnecting switch?
A: An indoor disconnecting switch (isolator) is primarily used to create a visible insulation gap in medium-voltage circuits when equipment is de-energized, ensuring safe maintenance. It is designed to switch small capacitive or inductive currents, but not heavy load or short-circuit currents.

Q2: What voltage tiers are available in Chennuo’s indoor isolator series?
A: Our indoor disconnecting switch series covers standard voltage classes from 10kV/12kV, 24kV, up to 40.5kV, with rated currents ranging from 630A to 2000A to suit various distribution layouts.

Q3: Does the switch include grounding capabilities?
A: Yes. We offer flexible configurations including switches without grounding blades, with single-side grounding blades, or with double-side grounding blades (earthing switches) to fulfill specific safety interlocking requirements.

Q4: Can these indoor isolators be operated with a motor, or are they strictly manual?
A: They support standard manual operation via an operating handle (CS mechanism). Additionally, motorized operation options can be configured upon request for automated substation applications.

Q5: What certifications and standards do your disconnecting switches comply with?
A: Our products are manufactured in strict compliance with relevant IEC standards and national GB standards (such as GB/T 1985 for high-voltage alternating disconnectors and earthing switches), ensuring seamless international project deployment.