Secure PT3 X43-15F: Class 0.5 Three-Phase Multi-Function Transducer

 

Secure PT3 X43-15F: One Three-Phase Transducer, Four Outputs, Class 0.5 Accuracy

Most plants don't need one measurement from a three-phase supply. They need several: voltage for supply quality, current for loading, active power for energy tracking, power factor for correction panels. Fitting a separate transducer for each means more panel space, more wiring and more things to go wrong. Secure's PT3 multi-function transducer was built to replace that stack of devices, and the PT3 X43-15F is the Class 0.5, four-output version of it.

What Is the Secure PT3 X43-15F?

The Secure PT3 X43-15F is a three-phase multi-function transducer with Accuracy Class 0.5. Secure describes the PT3 range as compact, configurable, multiple-measurand transducers for supply utilities and industrial applications, giving accurate true-RMS measurements with a quick response time. It converts what is happening on a three-phase supply into standard analogue signals that a PLC, SCADA system or DCS can read directly.

Decoding the Model Number

Secure's ordering key makes the code easy to read, and it tells you exactly what you are buying:

• PT3: the three-phase transducer family
• X: the auxiliary supply position in the code (high or low supply versions exist in the range, so confirm which you need when ordering)
• 4: four analogue outputs
• 3: three-phase
• 1 5: accuracy class digit 5, which means Class 0.5
• F: multi-function, meaning the transducer can be configured for several measurands

This also explains sibling models you may have seen, such as PT3 X43-155 (current only) and PT3 X43-128 (power factor only). The last digit selects a single function; "F" opens up the full multi-function set.

What It Can Measure

In its multi-function form, the PT3 is site-configurable for these measurands:

• AC voltage
• AC current
• Active power
• Reactive power
• Power factor

That flexibility is why Secure calls it a "4-in-1" programmable transducer: four load-independent, galvanically isolated outputs, each of which can be set to carry a different measurand, input range and output curve.

Key Specifications

From Secure's published PT3 data:

• Accuracy class: 0.5 for this model
• Outputs: up to four load-independent, galvanically isolated analogue outputs (the PT3 range is offered with 2 or 4 outputs)
• Output signals: mA types such as 0-20 mA and 4-20 mA, and voltage types such as 0-5 V and 0-10 V. Some bipolar and low-current ranges depend on the accuracy class
• Nominal voltage input: 3 x 100 to 415 V L-L (3-phase 3-wire), or 3 x 57.5 to 240 V L-N (3-phase 4-wire), with a measuring range of 0 to 130% of nominal (500 V maximum)
• Nominal current input: 1 A to 5 A, with a range of 0 to 150%
• Frequency: 50/60 Hz ±5%
• Response time: approximately 100 to 220 ms
• Maximum load: up to 750 Ω at 20 mA per output
• Protection: Class II double insulation to EN 61010-1
• Standards: designed to comply with IEC 60688
• Programming: USB, using Secure's configuration software, with diagnostic LEDs for status
• Housing: flame-retardant polycarbonate, approximately 100 x 75 x 105 mm, weighing about 0.7 kg

Why Galvanic Isolation and Load Independence Matter

Two features make this transducer suitable for real industrial control systems:

Galvanically isolated outputs electrically separate each analogue output from the measured circuit. A fault or voltage spike on the power side is far less likely to travel back and damage the PLC or SCADA input on the control side.

Load-independent accuracy means the output stays accurate regardless of what you connect to it, within the specified maximum load. You don't need to recalibrate when the monitoring device changes.

Why Class 0.5 Is a Good Middle Ground

Accuracy class shows how closely the output follows the true measured value, and lower numbers mean tighter accuracy. Class 1.0 is fine for general monitoring; Class 0.2 is for precision work. Class 0.5 sits comfortably in between and suits most industrial monitoring, energy management and process control jobs where the data feeds real decisions but laboratory-grade precision isn't required. If your application is billing-grade or very sensitive, consider the Class 0.2 versions in the same family.

Where This Transducer Gets Used

• Industrial plants feeding voltage, current, power and power factor to SCADA or DCS
• Motor control centres monitoring loading on large drives
• APFC and power factor correction panels that need continuous power factor feedback
• Substations and distribution boards sending measurements to remote monitoring
• Energy management systems logging real and reactive power
• Utilities and supply applications, which Secure specifically designed the PT3 range for

How to Choose and Order

• Single-function or multi-function? If you need only one parameter, a single-function PT3 may do. If you want several signals from one device, choose the multi-function "F" version.
• How many outputs? Match the number of outputs to how many analogue channels your PLC or SCADA actually has available.
• Which output signal? 4-20 mA is the common industrial standard because it tolerates long cable runs well and shows a broken wire. Check your input cards.
• Auxiliary supply: confirm whether your panel has a high or low auxiliary supply, as the PT3 comes in versions for each.
• Pair it with the right CT. For high-current circuits, use a current transformer to scale current down to the 1 A or 5 A input range.

For how transducers, CTs and panel meters work together, see our SECURE Panel Meters, CTs & Transducers guide and Current Transformer vs Transducer guide. For single-phase power measurement, see our PT1 XX1-126 Active Power Transducer guide.

Why Buy a Genuine Secure Transducer from SB Smart

A transducer's output is only as trustworthy as its calibration, and a poor substitute can quietly feed wrong data into your whole monitoring system. SB Smart supplies genuine Secure PT1 and PT3 transducers, digital panel meters and current transformers, with GST invoicing, competitive B2B pricing, and PAN India delivery. Their technical team can help confirm the right measurand, output type and auxiliary supply for your panel before you order.

Frequently Asked Questions (FAQ)

1. What is the Secure PT3 X43-15F? It is a three-phase, multi-function transducer with Accuracy Class 0.5, designed to convert voltage, current, power and power factor into standard analogue output signals for PLC, SCADA and DCS systems.

2. What does the "F" in the model number mean? In Secure's ordering key, "F" indicates a multi-function transducer that can be configured for several measurands, while other digits in that position select a single function such as current or power factor.

3. How many outputs does it have? The model code indicates four outputs. The PT3 range is available with 2 or 4 load-independent, galvanically isolated analogue outputs.

4. What does Accuracy Class 0.5 mean? It means the transducer's output follows the true measured value to within a tight tolerance, better than Class 1.0 and suited to most industrial monitoring and energy management applications.

5. How is the PT3 configured? It is programmed by USB using Secure's configuration software, which sets input parameters, measurands, output ranges and output curves on site.

6. What output signals are supported? The PT3 range supports mA outputs such as 0-20 mA and 4-20 mA and voltage outputs such as 0-5 V and 0-10 V, with some ranges depending on accuracy class.

7. Do I need a CT with this transducer? For high-current circuits, yes. A current transformer scales the current down to the transducer's 1 A or 5 A nominal input.

8. Where can I buy a genuine Secure PT3 X43-15F in India? SB Smart supplies the genuine Secure PT3 X43-15F with GST invoicing, technical support, and PAN India delivery.

Final Thought

The PT3 X43-15F packs several measurements into one compact, isolated and programmable device, saving panel space and wiring while still giving your control system clean, accurate signals. For plants that want voltage, current, power and power factor from a single three-phase point, a Class 0.5 multi-function transducer is a practical and efficient answer.