PT Handcart for 12kV KYN28 Switchgear | Voltage Transformer Unit
PT Handcart for 12kV KYN28 Switchgear | Voltage Transformer Unit is a withdrawable voltage transformer device designed for 12kV metal-clad switchgear systems. It integrates a high-performance potential transformer (PT/VT) to provide accurate voltage measurement, metering, monitoring, and relay protection signals for medium-voltage power distribution networks.
Featuring a compact withdrawable structure and reliable mechanical interlocking design, the PT Handcart enables safe operation, convenient maintenance, and flexible installation in KYN28-12 switchgear and other compatible cabinets. It is widely used in substations, industrial power systems, and distribution networks requiring precise voltage detection, reliable protection, and enhanced operational safety.
Get a QuoteOverview
The Mid-Mounted PT Handcart, also known as a Withdrawable Voltage Transformer Unit, is a key component designed for 12kV metal-clad switchgear systems such as KYN28A-12 and HXGN-12. By integrating a high-performance voltage transformer (VT) into a withdrawable plug-in structure, it provides reliable voltage measurement, metering, relay protection, and voltage monitoring functions for medium-voltage power systems.
Featuring a compact design and flexible withdrawable mechanism, the Mid-Mounted PT Handcart enables safe operation, convenient maintenance, and efficient integration with indoor switchgear assemblies. It is widely used in substations, industrial power distribution systems, and medium-voltage networks requiring accurate voltage detection, reliable protection, and enhanced operational safety.
Key Features
The Mid-Mounted PT Handcart combines a reliable withdrawable structure with integrated voltage transformer technology, providing safe voltage measurement and protection solutions for 12kV metal-clad switchgear systems.
- Fully Withdrawable Mid-Mounted Structure
Designed with a mid-mounted plug-in configuration, allowing easy installation, removal, and maintenance while improving switchgear operation flexibility. - Integrated Voltage Transformer (PT/VT) Options
Available with single-phase or three-phase voltage transformers to meet different voltage measurement, metering, and protection requirements. - Manual Racking Mechanism with Safety Interlocking
Equipped with a reliable manual racking system and mechanical interlock to ensure safe insertion, withdrawal, and prevent incorrect operation. - Compatible with Multiple Switchgear Systems
Suitable for KYN28A-12, HXGN-12, and customized OEM metal-clad switchgear cabinets, providing flexible integration options. - Visible Isolation and Maintenance Safety Design
Provides a clear disconnection position to enhance maintenance safety and ensure reliable isolation during inspection and servicing.
Technical Data
| Item | Unit | Parameter | |
| Rated voltage | kV | 12 | |
| Rated frequency | Hz | 50 | |
| Secondary Output | kA | 100V / 110V (customizable) | |
| Withstand Voltage | kV | 28kV/1min, BIL 75kV | |
| Handcart Rail Width | mm | 210mm / 275mm | |
| Installation Type | / | Manual rack-in / rack-out | |
Overall and mounting dimensions(mm)
Typical Applications
The Mid-Mounted PT Handcart is widely used in 12kV indoor metal-clad switchgear systems, providing reliable voltage measurement, metering, and protection functions.
- KYN28A-12 Switchgear Systems
Installed in PT compartments of KYN28A-12 switchgear to provide accurate voltage sensing and relay protection signals. - High-Voltage Substations
Used for voltage measurement, monitoring, and protection input in medium-voltage substations. - Industrial Power Distribution Facilities
Suitable for industrial plants and control rooms requiring reliable voltage detection and electrical system monitoring. - OEM Metal-Clad Switchgear Applications
Compatible with customized switchgear solutions and OEM cabinets with proper mechanical and electrical adaptation.
Installation Guidelines
To ensure safe operation and long-term reliability, proper installation and maintenance procedures should be followed:
- Verify Mechanical Compatibility
Confirm that the handcart rail dimensions match the switchgear guide slots (such as 210mm or 275mm configurations) before installation. - Ensure Proper Grounding
Connect and verify the VT shield grounding before energizing the equipment to maintain measurement accuracy and operational safety. - Complete Handcart Insertion Before Connection
Fully insert and position the handcart before engaging secondary electrical connections. - Perform Interlock Verification
Test the mechanical interlocking system before operation to prevent unsafe insertion or withdrawal under energized conditions. - Maintain Plug-In Contacts Regularly
Inspect and clean plug-in contacts periodically to prevent oxidation and ensure reliable electrical connection.
