Medium-voltage Indoor Isolation Switch

As a leading China manufacturer and supplier, Wzonpa would like to provide you GN19 series Medium-voltage Indoor Isolation switch, designed for reliable, safe, and efficient indoor medium-voltage applications in switchgear systems, ensuring clear circuit isolation and maintenance safety.

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Product Description

The Medium-voltage Indoor Isolation switch by Wzonpa is a high-quality product engineered for safe disconnection and maintenance of indoor medium-voltage electrical systems. Manufactured in our factory, this isolator is suitable for switchgears such as XGN, KYN28, and HXGN, providing seamless integration into industrial plants, commercial complexes, and infrastructure projects.

The switch adopts a rotary contact mechanism with three positions (ON/OFF/EARTH), ensuring consistent performance in breaking and isolating circuits. Controlled manually, the GN19 series can be mounted horizontally or vertically and optionally paired with GN19-12M/T grounding switches for enhanced electrical safety.

Applications

The Medium-voltage Indoor Isolation switch is widely used in:

Industrial plants and manufacturing facilities

Commercial complexes and data centers

Infrastructure projects such as metro stations, tunnels, and substations

Indoor switchgear systems (XGN, KYN28, HXGN panels)

Its compact footprint makes it ideal for installations where space is limited without compromising performance.

Key Features

Reliable Isolation Performance: The Medium-voltage Indoor Isolation Switch offers clear visibility of the isolation status, reducing operational risks during maintenance.

Durable Construction: Designed for over 2,000 mechanical operations, the rotary contact system ensures long-term stability and reliability.

Technical Excellence: Rated voltage up to 12kV, rated current 400–1250A, peak withstand current up to 80kA, lightning impulse withstand voltage 75kV.

Flexible Installation: Supports horizontal or vertical mounting, making it ideal for space-constrained switchgear panels.

Safety Compliance: Fully compliant with GB1985 and IEC 62271-102 standards, ISO and CE certified, offering global acceptance and assured reliability.

Certifications and Quality Assurance

GB1985 and IEC 62271-102 compliance

ISO 9001 Quality Management System

CE certification for international markets

Factory production line inspection and type testing documentation available

Appearance and installation dimensions （Unit：mm）

Material Comparison with Competitor Products

Feature / Parameter	Wzonpa GN19 Medium-voltage Indoor Isolation Switch	Competitor Steel / Plastic Composite Switch	Advantage
Housing Material	High-quality epoxy-coated steel & copper contacts	Standard steel or plastic composite	Better corrosion resistance, longer lifespan, and robust mechanical strength
Mechanical Life	≥2000 operations	1000–1500 operations	Twice as durable, reducing maintenance frequency
Short-time Withstand Current	12.5–31.5kA / up to 80kA peak	10–20kA / lower peak	Handles higher fault currents, ensuring grid safety
Rated Voltage	12kV	10–12kV	More stable performance for medium-voltage systems
Certifications	IEC 62271-102, GB1985, ISO, CE	Often limited to local standards	Internationally recognized, ensures global acceptability
Visibility of Isolation Status	Clear visual indication	Partial or no visible indicator	Reduces operational errors and increases safety
Environmental Adaptability	-30°C to 40°C, humidity ≤95%, seismic intensity level 8	Limited environmental tolerance	Reliable operation in extreme indoor conditions

Technical parameters

Project		Unit	Parameter
Rated Voltage		KV	12
1 min power frequency withstand voltage	To ground	KV	42
	Fracture	KV	48
Lightning impulse withstand voltage (peak)	To ground	KV	75
	Fracture	KV	85
Rated frequency		Hz	50
Rated current		A	400	630			1000/1250
Rated short-time withstand current		KA	1620	16	20	25	20	25	31.5
Rated peak withstand current		KA	4050	40	50	63	50	63	80
Rated short-time withstand current duration main knife /ground knife		s	4/2
Creepage distance		mm	300~380
Mechanical life		Times	2000

Model No.	Rated voltage	Rated current (A)	Rated short time withstand current(4s)kA	Rated peak withstand current （kA）
GN19-12/400-12.5	12KV	400A	12.5	31.5
GN19-12/630-20	12KV	630A	20	50
GN19-12/1000-31.5	12KV	1000A	31.5	80
GN19-12/1250-12.5	12kV	1250A	31.5	80
GN19-12C/400-12.5	12KV	400A	12.5	31.5
GN19-12C/630-20	12KV	630A	20	50
GN19-12C/1000-31.5	12KV	1000A	31.5	80
GN19-12C/1250-31.5	12KV	1250A	31.5	80

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Contact Info

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Address

No. 58 Binhainan Fourth Road, Economic Development Zone, Yueqing City, Wenzhou City, Zhejiang Province, China
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Tel

+86-18662318620
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Email

Info@wzonpa.com

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