1. Description
Revenue Grade CT (RGCT) is a high-accuracy, externally mounted current transformer that installs directly on the primary conductor to measure energy (kWh) and power quality with revenue-grade precision. Designed for utility-grade and commercial metering applications, RGCT delivers reliable, repeatable measurements for billing, submetering, and advanced electrical analytics.
The RGCT series complies with both major global metering standards—IEC 61869-2 (accuracy classes 0.2S, 0.5S) and IEEE C57.13 (accuracy classes 0.15S, 0.3S)—making it a core sensor for high-precision metering systems. Even the best power meter cannot maintain system accuracy if the CT accuracy is insufficient; CT performance ultimately determines the trustworthiness of the entire measurement chain.
For commercial billing, revenue-grade energy metering, and high-resolution power quality monitoring, a proven RGCT is essential to ensure compliance, reduce measurement errors, and protect revenue integrity.
2. Why CT Accuracy Matters
To achieve the full performance of a high-precision power meter, you need a current transformer (CT) with equal or higher accuracy. The overall accuracy of an electrical metering system (system accuracy) is ultimately limited by the lowest-accuracy component in the measurement chain.
That means even if you install a premium, revenue-grade meter, using a lower-accuracy CT will reduce the entire billing accuracy to the CT’s level. In commercial billing and revenue-grade energy metering, CT accuracy directly impacts measurement reliability, billing integrity, and the value you get from your metering investment.
| Case A (Bad Match) | Case B (Perfect Match) | Results and Benefits |
|---|---|---|
| Class 0.2 meter + Class 0.5 standard CT | 0.2-class meter + 0.2S-class RGCT | Final 0.5-class system (wasting meter performance) |
| 0.2-class meter + 0.2S-class RGCT | Final 0.2-class system (precise billing possible) | - |
3. Applications
This product connects to the following equipment and ensures the reliability of energy and power quality measurements.
4. Model Configuration (Model Selection: RGCT Series)
You can select the optimal model according to the input method of the meter in use.
A. Standard Current Output (Standard Current Output Model)
This is an industry-standard model that fully supports the accuracy of standard power meters and PQAs.
| Category | Specifications | Features |
|---|---|---|
| Output | 5A, 1A | For connection to standard measuring instruments |
| Termination | Final 0.2-class system (precise billing possible) | Excellent at maintaining accuracy when transmitting high-current signals |
| Wire Lead Type: Lead-wire outlet type | For connection to standard measuring instruments |
B. Voltage & Plug-in Output (Voltage and Plug-in Model)
A safe, convenient, high-precision solution for the latest digital meters and smart measuring
| Category | Specifications | Features |
|---|---|---|
| Output | 333mV, 225mV, 100mA | Dedicated to plug-in energy meters; enhanced safety |
| Termination | RJ12 / RJ45: Plug-and-play (plug-in) connection | Prevents miswiring and reduces installation time |
| Terminal Type: Robust screw-tightened terminal block | No overvoltage risk when opened (Safe) | |
| Wire Lead Type: Lead-wire outlet type | - |
1. Product Overview
DC-Tolerant CTs are specialized current transformers designed to fundamentally prevent magnetic saturation of the CT core that can occur when a DC component is superimposed in an AC system or when the CT is exposed to an external DC magnetic field.
By maximizing reliability in measurement environments, this product serves as a key sensor that ensures both the accuracy of energy measurement and the speed of system protection.
2. Primary Configuration
Depending on the customer’s design environment and current capacity, you can choose the optimal model between an integrated primary type and a through-hole type.
| - | Integrated Primary Type (Built-in Primary Conductor) | Through-Hole Type (Window / Primary Conductor Pass-Through) |
|---|---|---|
| Distributed Energy & EV | All-in-one CT with the primary conductor (busbar/wire) integrated inside the CT | Donut-shaped CT with a central window; the customer’s cable or busbar passes through the window |
| Smart Metering | Mounts directly on the PCB no need to select and assemble a separate busbar or cable |
Apply by routing the cable/busbar through the window high flexibility in system integration |
| Key Benefit | No Hassle: eliminates extra parts selection and assembly work | Flexibility: supports various cable/busbar sizes, increasing design freedom |
| Compact & Safe: optimized small footprint for tight PCB space ; verified primary-to-secondary insulation withstand (Hi-Pot test, e.g., 3.5 kV) |
High Current: suitable for high-current measurement (up to 120 A+) ; allows keeping existing busbar design |
|
| Typical Applications | Compact smart meters: single-phase / three-phase energy meters | Industrial meters: high-capacity PMD/PQA; high-current (120 A+) measurement systems |
| Core Message | “Direct PCB mount + compact & safe” | “Pass-through + flexible & high-current” |
3. Termination Styles
You can choose the termination method to match the level of automation in your production line and your internal design structure.
4. Key Differentiators (Why Choose This?)
“The grade of your meter and PMD is ultimately determined by the CT’s linearity.”
New JDTN Series for 0.5/1.0 Class Meter Grade
| Model | Primary Current Range | Error | Turns Ratio |
Characteristical Value | Terminal Structure |
Inner Dia.Ø |
||||
|---|---|---|---|---|---|---|---|---|---|---|
| Imax [Mrms] |
Îpeak [A0p] |
Phase Ø(I)[˚] |
L [H] |
Rcu [Ω] |
RB [Ω] |
UB [Vrms] |
||||
| JDTN20V | 20 | 20 | 4.00 | 1:2500 | 7.4 | 138 | 25 | 0.2 | Pin | 7 |
| JDTN40V | 40 | 40 | 3.96 | 1:2500 | 4.48 | 93 | 5 | 0.08 | Pin | 8 |
| JDTN60V | 60 | 80 | 4.94 | 1:2500 | 2.84 | 65 | 12.5 | 0.3 | Pin | 8 |
| JDTN100V | 100 | 110 | 4.08 | 1:2500 | 3.1 | 62 | 7.5 | 0.3 | Pin | 10.8 |
| JDTN120V | 120 | 120 | 3.83 | 1:2500 | 3.22 | 55 | 6.25 | 0.3 | Pin | 13 |
| JDTN20W | 20 | 20 | 4.00 | 1:2500 | 7.4 | 138 | 25 | 0.2 | Wire | 7 |
| JDTN40W | 40 | 40 | 3.96 | 1:2500 | 4.48 | 93 | 5 | 0.08 | Wire | 8 |
| JDTN60W | 60 | 80 | 4.94 | 1:2500 | 2.84 | 65 | 12.5 | 0.3 | Wire | 8 |
| JDTN100W | 100 | 110 | 4.08 | 1:2500 | 3.1 | 62 | 7.5 | 0.3 | Wire | 10.8 |
| JDTN120W | 120 | 120 | 3.83 | 1:2500 | 3.22 | 55 | 6.25 | 0.3 | Wire | 13 |
1. Product Overview
High Precision CTs are high-performance current transformers designed to maximize the performance of smart meters, power quality analyzers (PQA), and power metering and monitoring devices (PMD). This product family provides excellent linearity (High Linearity) and low phase error (Low Phase Error), fully supporting the following strict global accuracy standards with only minimal calibration (Minimal Calibration)—without complex multi-point correction.
As a result, it not only improves simple billing meters, but also shortens development time and significantly increases mass-production efficiency when developing high-performance PMDs where power quality analysis (such as harmonics) is essential.
2. Primary Configuration
Depending on the customer’s design environment and current capacity, you can choose the optimal model between an integrated primary type and a through-hole type.
| - | Integrated Primary Type (Built-in Primary Conductor) | Through-Hole Type (Window / Primary Conductor Pass-Through) |
|---|---|---|
| Distributed Energy & EV | All-in-one CT with the primary conductor (busbar/wire) integrated inside the CT | Donut-shaped CT with a central window; the customer’s cable or busbar passes through the window |
| Smart Metering | Mounts directly on the PCB no need to select and assemble a separate busbar or cable |
Apply by routing the cable/busbar through the window high flexibility in system integration |
| Key Benefit | No Hassle: eliminates extra parts selection and assembly work | Flexibility: supports various cable/busbar sizes, increasing design freedom |
| Compact & Safe: optimized small footprint for tight PCB space ; verified primary-to-secondary insulation withstand (Hi-Pot test, e.g., 3.5 kV) |
High Current: suitable for high-current measurement (up to 120 A+) ; allows keeping existing busbar design |
|
| Typical Applications | Compact smart meters: single-phase / three-phase energy meters | Industrial meters: high-capacity PMD/PQA; high-current (120 A+) measurement systems |
| Core Message | “Direct PCB mount + compact & safe” | “Pass-through + flexible & high-current” |
3. Termination Styles
You can choose the termination method to match the level of automation in your production line and your internal design structure.
4. Key Differentiators (Why Choose This?)
“The grade of your meter and PMD is ultimately determined by the CT’s linearity.”
JND Address
#1115, Joongang Tower,
Wiryegwangjang-ro 300,
Sujeong-gu, 13640 Seongnam,
Gyoenggi-do, South Korea
Support
sos@jndelectronics.com
Tel: +82-31-577-2280
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