10kV Protective Voltage Transformer
The 10kV protective voltage transformer is specially designed for medium-voltage distribution systems where both accurate voltage measurement and reliable protection are required.
This protective voltage transformer adopts a post-type (pillar) structure with cast resin insulation, providing excellent dielectric strength, high mechanical rigidity, and long-term operational safety.
Product Overview
In modern power systems, a protective voltage transformer is a key component used to step down primary system voltage to a standardized secondary level for meters, relays, and monitoring devices.
This 10kV protective voltage transformer combines metering accuracy with protection performance, making it suitable for switchgear, ring main units, compact substations, and industrial power distribution cabinets.
Its resin-insulated post-type design ensures a compact footprint, easy installation on panels or bases, and strong resistance to moisture, dust, and environmental pollution.
Key Features
- Rated voltage: 10kV medium-voltage system
- Integrated protective voltage transformer function for relay and system protection
- Post-type (pillar) construction for compact and stable mounting
- Cast resin insulation with high dielectric strength and excellent thermal performance
- High output capacity suitable for both metering and protection circuits
- Reinforced housing for improved mechanical strength and vibration resistance
- Low partial discharge and low loss design for long service life
Applications
- Medium-voltage switchgear and metal-clad switchboards
- Ring main units and compact transformer substations
- Industrial plants and factory power distribution systems
- Utility substations and distribution networks
- Protection and metering circuits requiring a protective voltage transformer
Technical Data
| Rated current ratio | Secondary combination | Accuracy level and rated output | One second thermal stability current | Dynamic stable current | |||
| 0.2S | 0.2 | 0.5 | 10P15 | ||||
| 20/5 | 0.2S/10P15 0.2/10P15 0.5/10P15 |
10 | 10 | 15 | 15 | 1.8 | 4.5 |
| 30/5 | 2.7 | 6.75 | |||||
| 40/5 | 3.6 | 9 | |||||
| 50/5 | 4.5 | 11.25 | |||||
| 75/5 | 6.75 | 16.9 | |||||
| 100/5 | 9 | 22.5 | |||||
| 150/5 | 13.5 | 33.75 | |||||
| 200/5 | 18 | 45 | |||||
| 300/5 | 22.5 | 56.25 | |||||
| 400/5 | 30 | 75 | |||||
| 600/5 | 30 | 75 | |||||
| 800/5 | 40 | 100 | |||||
| 1000/5 | 50 | 125 | |||||
Operating Conditions
- System voltage: 10kV class
- Frequency: 50/60Hz
- Indoor installation, pollution level according to IEC/EN standards
- Ambient temperature: typically −25°C to +40°C (or as specified in project requirements)
- Altitude not exceeding standard distribution equipment limits
Benefits of Using a Protective Voltage Transformer
By using a dedicated protective voltage transformer in your switchgear or distribution panel, you obtain more accurate voltage signals for relays and monitoring devices.
The protective VT helps isolate the high-voltage network from secondary equipment, improves personnel safety, and enhances the stability of the entire protection system.
With resin insulation and a compact post-type body, this 10kV model reduces maintenance needs and provides reliable long-term service even in demanding industrial environments.
Installation and Maintenance
- Base-mounted structure allows easy bolting to metal panels or switchgear frames.
- Primary and secondary terminals are clearly marked to simplify wiring.
- Regular visual inspection is recommended to check for dust, contamination, and mechanical damage.
- No oil filling is required thanks to solid cast resin insulation, which greatly reduces routine maintenance.
FAQ – 10kV Protective Voltage Transformer
Q1: What is the main function of a protective voltage transformer?
A protective voltage transformer steps down the primary system voltage to a standardized secondary level for protective relays.
It provides accurate voltage signals during normal and fault conditions, helping to trip breakers quickly and safely.
Q2: Where can this 10kV protective voltage transformer be used?
It is mainly used in 10kV switchgear, ring main units, compact substations, and industrial power distribution panels for both metering and protection applications.
Q3: Why choose a resin-insulated post-type design?
The resin-insulated post-type design offers high mechanical strength, compact dimensions, excellent insulation performance, and strong resistance to moisture and pollution.
This makes the transformer very suitable for modern indoor switchgear and complete set equipment.
