Medium-Voltage Switchgear
KYN28-12 Switchgear
Indoor metal-clad withdrawable switchgear for receiving and distributing electrical power, with circuit control, protection and monitoring.
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Category overview
Switchgear
Switchgear brings switching, protection and associated circuit functions into a coordinated assembly. Start with the system voltage, then compare the required switching duty and operating arrangement. The available range covers low-voltage drawer units, fixed ring-main equipment and withdrawable medium-voltage breaker equipment.
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Medium-Voltage Switchgear
KYN61-40.5 Switchgear
Withdrawable metal-clad switchgear rated at 40.5 kV for use in 35 kV, three-phase AC distribution systems.
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Medium-Voltage Switchgear
HXGN15-12 Ring Main Switchgear
Compact fixed metal-enclosed switchgear for 12 kV ring-main or radial distribution networks, with load-switch and switch-fuse configurations.
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Low-Voltage Switchgear
GCS Drawer Switchgear
Withdrawable low-voltage switchgear for power distribution, centralized motor control and reactive power compensation.
View productThe essentials
What is Switchgear?
Switchgear is an assembly of switching devices, protective equipment and associated circuits used to control electrical power. Its construction depends on the system voltage and the circuit function. The current range includes GCS low-voltage drawer switchgear, HXGN15-12 fixed ring-main equipment and KYN28-12 / KYN61-40.5 withdrawable metal-clad equipment. These formats have different switching and protection capabilities.
How it works
Working Principle of Switchgear
Switch the power circuit
A circuit breaker or load switch connects and disconnects the power circuit within its specified operating duty. The selected switching device determines which currents it can interrupt. The operating arrangement must therefore distinguish normal load switching from the separate task of interrupting a fault current.
Provide measurement signals
Where fitted, current and voltage transformers convert system quantities into signals suitable for measuring instruments and protective devices. These signals allow the protection scheme to assess circuit conditions without applying the primary circuit's full voltage or current directly to the connected instruments or relays.
Initiate fault interruption
In a relay-protected breaker circuit, the protective device evaluates the measured signals for the specified fault conditions, such as overcurrent or earth faults. When its operating criteria are met, it sends a trip command to the circuit breaker. The breaker then interrupts the affected circuit within its rated capability.
Establish the isolation arrangement
The specified isolating device or withdrawable arrangement separates the required part of the circuit for maintenance. An isolating switch can provide a visible break where the equipment design includes one. Isolation, earthing and access follow the model's approved operating sequence and do not depend on opening the circuit breaker alone.
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Why this category
Our Switchgear Advantages
- Separate low-voltage and medium-voltage groups make selection easier to begin with the actual system voltage.
- Drawer, fixed ring-main and withdrawable breaker formats address different circuit and operating requirements.
- Model-specific technical tables help compare current ratings, fault duty and enclosure construction.
- Power distribution, motor-control and feeder functions can be matched to the appropriate equipment type.
Before you specify
Frequently Asked Questions
How do I choose between low-voltage and medium-voltage switchgear?
Start with the system voltage and circuit duty. GCS serves the listed low-voltage distribution and motor-control applications; HXGN15-12, KYN28-12 and KYN61-40.5 serve their specified medium-voltage applications.
Is ring main switchgear equivalent to circuit-breaker switchgear?
No. HXGN15-12 is listed with load-switch or switch-fuse configurations. KYN28-12 and KYN61-40.5 use withdrawable circuit-breaker arrangements. The required switching duty and fault protection determine which format is suitable.
Can the highest voltage, current and short-circuit values be combined?
No. Those values describe different model and configuration options. Confirm their permitted combination, operating conditions and selected devices for the equipment being ordered.
Are remote monitoring and communication included?
They are not established as standard across this range. State the signals, control functions, communication interfaces and supervisory-system requirements so the proposed configuration and scope can be reviewed.
What information is needed for a switchgear selection review?
Provide the system and equipment voltages, single-line diagram, continuous currents, short-circuit duty, protection and metering requirements, operating arrangement and site conditions.
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Select the right equipment for your project.
Share your specifications, drawings and installation conditions. We can review the appropriate product and configuration.
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