Combined CT PT
The products are designed in strict accordance with IEC or ANSI standards, and the manufacturing steps meet the technological requirements
Model
Our Products
Precise conversion, secure isolation, ensuring reliable current measurement every time
13.8kV Stainless-Steel Tank Metering Units
Stainless steet tank metering units MODEL:3.3-13.8 kV
33/35kV Epoxy Resin-Type Combined CT PT
Outdoor Epoxy Resin insulated Combined CT PT MODEL:33-35kV
22/24kV Epoxy Resin-Type Combined CT PT
Outdoor Epoxy Resin insulated Combined CT PT MODEL:15-24 kV
10/11kV Epoxy Resin-Type Combined CT PT
Outdoor Epoxy resin insulated Combined CT PT MODEL:3.3-13.8 kV
Overview
Key Strengths
The combination of CTs and PTs (also known as: combined transformers / high-voltage combined metering boxes / TV+TA metering units) typically refers to the integration of current transformers (CTs) and voltage transformers (PTs) within a single enclosure or
the same set of metering cabinets, working in conjunction with an electricity meter to form a complete high-voltage electricity metering system.
- High-precision measurement
- Wide-range adaptability
- Stable and reliable
- Multi-layered security
- Flexible installation
Advantages of Choosing Us
Why choose our products?
1
🏅Quality Assurance
Strict quality control, proven over time. Authorized certification, trustworthy.
2
✅Precise measurement
Every product undergoes individual inspection at the comprehensive testing station before leaving the factory to ensure consistent accuracy.
3
🌍Select
Complete range of sizes—everything you need in one place
Main Structure
Primary winding of CT
High electrolytic copper is used as primary winding, silver base welding material is used at the welding place, and semiconductor shielded paper is wrapped to ensure that the partial discharge tseting data is qualified.
Secondary winding of CT
Large capacity design secondary winding, automatic winding, high insulation and high purity enameled wire, to ensure wide capacity output under standard accuracy.
PT Core
Imported silicon steel sheet made of PT core, high quality insulation tape, high quality compression sponge, to ensure that resin shrinkage does not affect the performance of PT core, secondary use of high purity enameled wire.
Primary winding of PT
Mechanized winding secondary winding, all wire uses high purity copper enameled wire, each layer uses high quality insulating paper, to ensure that the layer withstand voltage qualified, to ensure the stability of partial discharge test.
Quick Q&A
Frequently Asked Questions About the Integration of CT and PT
Q1：Why integrate cT and PT?
A: It simultaneously provides voltage and current signals to enable comprehensive electricity metering; its integrated design saves space, ensures good error matching, and facilitates sealing to prevent electricity theft, thereby meeting metering regulations.
Q2: What is the difference between a combined instrument transformer and separately installed CTs and PTs?
A:Modular = Same enclosure, factory-calibrated as a single unit, minimal cumulative error, easy to manage
Discrete = Flexible layout, but requires more wiring, errors must be considered individually, and takes up more space.
Q3: Can it be used solely for protection? Can it be used solely for measurement?
A:
* High-voltage meter panels are primarily used for commercial metering (high accuracy: 0.2S/0.2 class).
* If they are also used for protection, the protection class (e.g., 3P/6P) must be specified; however, protection and metering CTs/PTs are typically configured separately.
Q4: What precautions should be taken regarding the secondary side?
A:
* CT secondary windings must never be left open-circuited (this will generate dangerous high voltage)
* Never short-circuit the secondary side of a PT (this will burn out the windings)
* Must be reliably grounded (typically, the PT secondary neutral (N) and the CT secondary K₂ are grounded)
Q5: How do I choose an accuracy grade?
A:
*Metering: CT 02S/0.5S, PT 0.2/0.5
*Protection: CT 5P10/5P20, PT 3P/6P
Metering panels are generally configured according to metering accuracy.
We look forward to becoming your trusted electrical partner！
