Voltage scaling
Converts primary voltage to standardized 100 V or 110 V secondary values.
Medium-voltage instrument transformers
Voltage Transformers
PTs convert medium voltage into a standardized, isolated secondary signal so meters, counters, and protection relays can operate safely and accurately.
Up to 36 kV
Voltage class
Up to 100 VA
Secondary burden
Measurement and protection
Safe voltage signals for precise control.
Niroo Trans voltage transformers are available for MV switchgear, substations, metering, and protection, with multiple accuracy classes and indoor or outdoor configurations.
Protection supply
Provides isolated voltage signals for meters, monitoring equipment, and relays.
Technical range
Voltage transformer specifications.
General data for 4VPA, 4VPA1, VPV, and VPV1 voltage-transformer families.
| Characteristic | Symbol | 12 kV | 24 kV | 36 kV |
|---|---|---|---|---|
| Highest system voltage | Um (kV) | 12 | 24 | 36 |
| Insulation level | BIL (kV) | 28–75 | 50–125 | 70–170 |
| Rated primary voltage | Un (kV) | 11, 11/√3 | 20, 20/√3 | 33, 33/√3 |
| Rated secondary voltage | Usn (V) | 100/√3, 110/√3, 100, or 110 V | ||
| Rated secondary burden | VA | Up to 100 VA | ||
| Secondary windings | — | Up to 3 windings | ||
| Accuracy classes | — | 3P, 0.2, 0.5 | ||
| Rated frequency | F (Hz) | 50 / 60 Hz | ||
| Installation | — | Indoor or outdoor | ||
Applications and support
Built around the voltage system.
Main applications
- MV switchgear voltage measurement
- Protection relay and meter supply
- Distribution and industrial substations
- Monitoring and control systems
Technical flexibility
- Voltage classes up to 36 kV
- Secondary burden up to 100 VA
- Indoor and outdoor installation
- 50 Hz and 60 Hz networks
Pooya Electric support
We assist with PT selection, price enquiries, availability checks, and coordination of product supply for your project.
Contact sales
Need a PT quotation or technical review?
Send your voltage ratio, burden, windings, accuracy class, and installation requirements.