What Is Three Phase Current Transformer？
The LSY three-phase current transformer is suitable for installation in the ring net switch cabinets and switch on the main pillar of the three-phase casing, and zero sequence current for three phase current transformer measurement and protection, can also be used for more cable circuits of zero sequence current measurementand protection. The series of zero sequence current transformer core and secondary windings is made of high-quality epoxy resin vacuum around the note in the fire retardant plastic casing, which has the characteristic of moisture proof, stable performance and dispensing with maintenance.
Working Conditions of the Three Phase Current Transformer
- Altitude: less than 1000m;
- Ambient Temperature: -40℃ ~ +40℃.
- No violent mechanical vibration, no harmful gas or vapor, no electric or explosive, and no explosive dust in the location.
- Continuous operation voltage: 1.00 Un, long-term max, Over voltage: less.1 Un.
- Stable overcurrent (including harmonic current) less 1.3 in.
- With stand voltage: between terminal 2.15, time rated voltage for 10 seconds, between terminals, and container 42kV for 10 seconds.
Main Technical Data of the Three Phase Current Transformer
Note: Other special specification models are supplied according to user requirements
| type | Purpose | Measuring current | Protection current transformer | Dual winding current transformer | |||||||
| Stable primary current | Accuracy class and rated load | Accuracy class and rated load | Accuracy class and rated load | ||||||||
| 0.2S | 0.2 | 0.5 | 10P10 | 10P15 | 10P20 | 0.2S | 0.5 | 10P15 | 10P10 | ||
| LSY-10/107 | 75 | - | - | 1 | - | - | - | - | 1 | - | - |
| 100 | - | - | 2.5 | - | - | - | - | 1 | - | - | |
| 150 | - | - | 2.5 | 2.5 | - | - | - | 1.5 | - | - | |
| 200 | - | 2.5 | 2.5 | 2.5 | - | - | - | 2.5 | 2.5 | 5 | |
| 300 | 2.5 | 2.5 | 5 | 2.5 | - | - | - | 2.5 | 5 | 5 | |
| 400 | 5 | 5 | 5 | 5 | 2.5 | - | - | 5 | 7.5 | 7.5 | |
| 500 | 5 | 5 | 10 | 5 | 2.5 | - | - | 5 | 10 | 10 | |
| 600 | 5 | 10 | 10 | 7.5 | 2.5 | - | - | 5 | 10 | 10 | |
| 800 | 10 | 10 | 10 | 7.5 | 2.5 | - | - | 5 | 15 | 10 | |
Why Choose ZHIMING's Three Phase Current Transformer?
Integrated Compact Structure
ZHIMING’s three phase current transformer combines three independent sensing cores into one unified unit, reducing installation footprint and wiring complexity. The integrated design of this three phase current transformer eliminates phase-to-phase alignment errors, ensuring consistent performance across all three phases.
High-Accuracy Three-Phase Balanced Output
This three phase current transformer delivers precise, balanced current conversion across all three phases. With low ratio error and minimal phase displacement, the three phase current transformer supports both high-precision metering and reliable system protection for three-phase power distribution networks.
Enhanced Safety & Fault Tolerance
Built with a fully enclosed dry-type epoxy structure, ZHIMING’s three phase current transformer eliminates oil leakage and fire risks. The internal fault isolation design of this three phase current transformer prevents cascading failures, ensuring continuous operation even under partial faults.
Wide Compatibility for Diverse Applications
ZHIMING’s three phase current transformer supports a broad range of rated primary currents and multi-class combinations, meeting the needs of metering, monitoring, and protection in various indoor power systems. The versatile three phase current transformer is suitable for both commercial and industrial three-phase applications.
Maintenance-Free Long-Term Reliability
Constructed with high-grade materials, this three phase current transformer offers a long service life with zero routine maintenance. The rugged build of the three phase current transformer withstands harsh indoor operating conditions, reducing operational costs and downtime.
FAQ
What makes ZHIMING’s three phase current transformer different from separate single-phase units?
ZHIMING’s three phase current transformer integrates three sensing cores into one unit, ensuring phase balance and consistency. Unlike individual units, this three phase current transformer simplifies installation, reduces wiring errors, and saves valuable switchgear space.
What accuracy classes are available for this three phase current transformer?
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Our three phase current transformer supports multiple accuracy grades, including 0.2S/0.5S for high-precision metering and 10P series for protection purposes. This versatile three phase current transformer meets both billing-grade and safety requirements for three-phase power systems.
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Can this three phase current transformer withstand short-circuit surges?
Yes. The three phase current transformer is designed with high thermal and dynamic stability to meet standard short-circuit current ratings. This robust three phase current transformer safely withstands fault currents without permanent damage, protecting your power system.
What are the main applications for ZHIMING’s three phase current transformer?
This three phase current transformer is widely used in indoor distribution panels, low/medium-voltage switchgear, commercial buildings, and industrial power systems. The three phase current transformer supports energy metering, power monitoring, and relay protection for three-phase AC networks.
Does this three phase current transformer require regular maintenance?
No. Built with a fully enclosed dry-type epoxy structure, the three phase current transformer requires no routine maintenance. The corrosion-resistant three phase current transformer offers reliable, long-term operation with minimal downtime.
