Three Phase Open Close Split Core Current Transformer CT 2.5-5VA CTK-38 Current Transmitter
Rated 2.5-5VA with 0.5 class accuracy, it delivers a standard secondary output of 5A or 1A from a primary current that can be specified between 50A and 600A. The core is made from high-permeability silicon steel and the housing is a flame-retardant plastic enclosure rated IP54, with an isolation voltage of 3kV per minute. The unit works on both 50Hz and 60Hz supplies. Every unit leaves the factory with a QC pass sticker on the window.
Application Specifications
| Parameter | Specification |
| Model | ZXY-CTK-38 |
| Type | Clamp-on split-core current transformer (open/close type) |
| Rated capacity | 2.5-5VA |
| Accuracy class | 0.5 (0.2 optional) |
| Frequency | 50/60Hz |
| Primary current | Customizable (standard range 50A-600A) |
| Secondary current | 5A or 1A (standard) |
| Core | High-permeability silicon steel |
| Installation | Clamp-on, maximum conductor diameter Φ38mm; no need to disconnect cables |
| Isolation voltage | 3kV/min |
| Operating temperature | -25°C to +70°C |
| Enclosure rating | IP54 |
| Flammability rating | UL94 V-0 |
| Output connection | To be confirmed |
| Compliance standards | IEC/GB |
| Certification | RoHS, ISO 9001 and CE |
Product Features
● Clamp-On Split Core: A Φ38mm window opens to fit a cable or busbar without disconnecting the line.
● 0.5 Class Accuracy: 0.5 metering class, with 0.2 class available as an option.
● 2.5-5VA Rated Capacity: A burden range that covers standard metering and monitoring duties.
● 50A-600A Primary Range: Primary current specified to the installation.
● 5A or 1A Secondary Output: Standard secondary output.
● High-Permeability Silicon Steel Core: Stable measurement across the 50/60Hz range.
● IP54 Enclosure, UL94 V-0: Dust and splash protection in a flame-retardant housing.
● 3kV/min Isolation: Insulation between the primary and secondary circuits.
● IEC/GB Compliance: Designed to the IEC and GB standards.
Product Advantages
● Install without cutting the line: the hinged core clamps around an existing conductor, so metering can be added during a planned outage instead of a rewire.
● Accurate metering: 0.5 class accuracy, with 0.2 class optional, suits energy metering and power-quality monitoring.
● Wide current range: primary currents from 50A to 600A can be specified.
● High-permeability silicon steel core: low core loss and a stable secondary signal across the 50/60Hz band.
● Rugged enclosure: an IP54 housing in UL94 V-0 flame-retardant plastic suits control cabinets and industrial installations.
● Safe isolation: a 3kV/min isolation voltage separates the measured circuit from the secondary wiring.
● Marked for correct orientation: the P1 inlet and P2 outlet markings show which way the conductor must pass through the window.
● Two secondary options: a 5A or 1A secondary output matches either standard panel meters or 1A metering inputs.
Application scenario
Application Specifications
Three-phase power monitoring
Current measurement in panel meters and monitoring relays.
Energy management systems
Feeder and sub-circuit metering.
Motor load analysis
Current monitoring on three-phase motors.
PV inverter current detection
Current sensing in solar installations.
Switchgear and control cabinets
Adding metering to existing busbars and cable runs.
Product Details Showcase
Quality & Testing Assurance