The JDZX9-12Q and JDZX9-12QC are 12kV indoor single-phase voltage transformers designed with epoxy resin casting and fully enclosed construction. They are used in indoor switchgear cabinets to measure voltage, electric energy, and provide protective relaying in single-phase or three-phase AC circuits operating at 50Hz or 60Hz.
These transformers use high-performance cold-rolled silicon steel cores for improved efficiency and precision. The primary high-voltage lead exits from the top, while the secondary output is located on the transverse side. They support a load power factor of cosΦ=0.8 (lagging) and conform to IEC 60044-2 and IEC 61869-1 & 3 standards, ensuring safety and reliability.
| Type | Rated primary voltage (kV) |
Rated secondary voltage (kV) |
Accuracy classes combination | Rated output (VA) |
Thermal limiting current (VA) |
Rated insulation level (kV) |
| JDZX9-12Q | 11/√3 | 0.11/√3/0.11/3 | 0.2/6P(3P) | 25/100 | 400 | 12/28/75 |
| 0.5/6P(3P) | 50/100 | |||||
| 1/6P | 100/100 | |||||
| JDZX9-12QC | 11/√3 | 0.11/√3/0.11/3 | 0.2/6P(3P) | 60/150 | 800 | 12/28/75 |
| 0.5/6P(3P) | 120/150 | |||||
| 1/6P | 250/150 | |||||
| 0.11/√3/0.11/√3 | 0.2/0.2/6P(3P) | 30/30/150 | 400/400 | |||
| 0.2/0.5/6P(3P) | 30/50/150 | |||||
| 0.5/0.5/6P(3P) | 50/50/150 |
