Model PT7-2-150 Indoor Voltage Transformer
Indoor voltage transformer for metering, protective relaying, and control power; rated 36.5 kV, 500 VA.
Our PT7-2-150 provides reliable indoor voltage transformer performance for metering, protective relaying, and control power.
Overview
The Model PT7-2-150 Indoor Voltage Transformer is engineered for indoor service in utility, industrial, and commercial electrical distribution installations, targeting metering, protective relaying, and control power. It provides accurate voltage measurement across a wide operating range while maintaining stable long-term calibration.
Constructed with precision-wound cores and robust insulation, the PT7-2-150 maintains rated accuracy through repeated thermal cycling, mechanical vibration, and environmental exposure typical of indoor installations. Key ratings: 36.5 kV, 500 VA. Design conforms to IEEE C57.13 (where applicable) for instrument-transformer accuracy and dielectric testing.
Typical deployments include substation switchgear, generator and transformer protection, revenue metering, feeder and motor protection, and control-room instrumentation. Refer to the attached data sheet for complete ratio, burden, accuracy class, and dimensional details; contact our engineering team for custom ratings, extended range, or non-standard configurations.
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Product Specifications
- Frequency
- 60 Hz
- Insulation BIL
- 150 kV
- Weight
- 185 lbs
- Mounting
- Indoor
- Application
- Metering, Protection
- Accuracy Class
- 0.3 WXMYZ, 1.2ZZ at 100% rated voltage with 120 V based ANSI burden; 0.3 WXMY, 1.2Z at 58% rated voltage with 69.3 V base ANSI burden
- Maximum System Voltage
- 36.5 kV
- Thermal Rating
- 1,500 VA at 30°C ambient; 1,000 VA at 55°C ambient
- Primary Terminals
- 3/8-16 brass screws with one flatwasher and lockwasher
- Secondary Terminals
- 1/4-20 brass screws with one flatwasher and lockwasher
- Core and Coil Construction
- Vacuum encapsulated in polyurethane resin
- Fuse Clips
- Accept 1.63 inch diameter fuses; recommend 34.5 kV 0.5E rated fuses. Fuse-clip-only models do not include fuses.
- Overvoltage Capability
- Continuous operation at 110% of rated voltage permissible, provided the thermal burden VA rating is not exceeded
- Connection Type
- For line-to-line connection; may be connected line-to-neutral at rated line volts divided by the square root of three
- Test Card
- A test card is provided with each unit
Specification Table
| Primary V | Secondary V | Ratio (display) |
|---|---|---|
| 21000 | 120 | 175:1 |
| 21000 | 120 | 175:1 |
| 24000 | 120 | 200:1 |
| 24000 | 120 | 200:1 |
| 27600 | 115 | 240:1 |
| 27600 | 115 | 240:1 |
| 34500 | 115 | 300:1 |
| 34500 | 115 | 300:1 |
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