The JDZ-10 and JDZX10 Series Voltage Transformers are high-precision, indoor potential transformers designed for power systems with rated frequencies of 50Hz or 60Hz and voltages up to 10kV (12kV max). These transformers serve the critical function of stepping down high primary voltages to a standardized secondary voltage (typically 100V), providing accurate signals for energy meters, monitoring instruments, and protective relaying.

Constructed using advanced vacuum epoxy resin casting, the JDZ series features a fully enclosed structure that is immune to moisture, dust, and external pollutants. Its superior insulation properties and high thermal stability make it the industry standard for integration into KYN28, GZS1, and other types of medium-voltage metal-clad switchgear.

• High-Precision Core Technology: Utilizes premium-grade cold-rolled grain-oriented (CRGO) silicon steel cores. This ensures minimal excitation current and high accuracy, supporting Class 0.2 or 0.5 for fiscal metering.

• Vacuum Cast Resin Insulation: The entire primary and secondary winding assembly is encapsulated in high-dielectric epoxy resin under a vacuum. This process eliminates internal air bubbles, ensuring exceptionally low partial discharge (PD) levels.

• Exceptional Thermal Capacity: Engineered to handle high thermal burdens, allowing the transformer to operate continuously under rated conditions without overheating, extending its service life beyond 25 years.

• Compact & Rugged Design: The fully enclosed toroidal or rectangular architecture is vibration-resistant and compact, making it easy to install in crowded switchgear compartments.

• Secondary Terminal Safety: Equipped with a transparent, sealable secondary terminal cover to prevent accidental contact and deter unauthorized tampering with metering signals.

1. MV Switchgear (KYN28/KYN61): Providing voltage signals for protection relays and digital meters within primary distribution panels.

2. Substation Revenue Metering: Delivering high-accuracy (Class 0.2) voltage data for electricity billing and grid monitoring.

3. Ground Fault Protection: The JDZX10 variant includes a residual voltage winding for detecting phase-to-earth faults in ungrounded or resonant grounded systems.

4. Power Quality Analysis: Supplying clean, undistorted voltage waveforms to sensitive harmonic analyzers and power quality meters.

• Rigorous Factory Testing: Every unit undergoes a power frequency withstand test, partial discharge measurement, and polarity verification before shipment to guarantee site-ready performance.

• Partial Discharge Excellence: Our vacuum casting technology achieves PD levels significantly lower than IEC requirements, drastically reducing the risk of insulation breakdown over time.

• Custom Ratio Availability: We can manufacture VTs with non-standard primary or secondary voltages to match the requirements of international export projects (e.g., 6.6kV, 11kV, 13.8kV).

• Maintenance-Free Structure: The solid-cast insulation eliminates the need for oil testing or gas monitoring, providing a "set and forget" solution for indoor installations.

Q: What is the difference between JDZ and JDZX models?

A: The JDZ is a standard single-phase transformer. The JDZX features a specialized design with a residual voltage winding (earth-leakage winding) used to form a three-phase set for detecting ground faults.

Q: Can this transformer be used in high-altitude regions?

A: Standard units are rated for 1000m. For high-altitude applications (up to 4000m), we offer "Tropicalized" or "High-Plateau" versions with increased creepage distances and enhanced insulation.

Q: Does it come with primary fuses?

A: While the VT itself does not include fuses, the mounting base is designed to be compatible with standard HV fuse holders commonly used in switchgear draw-out trucks.

Low voltage distribution box

JXF series distribution box is suited for operating in the circuit of AC 50Hz, rated operating voltage 500V and below, in some special cases, the protection grade can reach up to IP55, the top and bottom of the panel will provide knockout holes, if multiple pipes are used for incoming lines, opening plate can be prepared, maxi rated current up to 400A, especially suitable for usage in metering and control box of mining field, hotel, living buildings and etc. Comply with GB7251.12-2013 Low voltage switchgear and controlgear, IEC60439-2:2011 Low voltage switchgear and controlgear standard.