---
title: "Current Transformer"
industry: "Electrical Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:CURRENT_TRANSFORMER"
  data_integrity_hash: "0a02ee879c30deddb6f03b760da1b6ab"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:CURRENT_TRANSFORMER"
  data_source_uri: "https://cnfx.com/llms/industry/electrical-equipment-manufacturing/product/current-transformer.md"
  official_resource_url: "https://cnfx.com/industry/electrical-equipment-manufacturing/product/current-transformer"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-100 kA primary current, 1-5 A secondary current, -40°C to +85°C ambient temperature"
    unit: "Ratio (e.g., 1000:5)"
engineering_limits:
  max_safe_operating_point:
    value: 1.8
    unit: "T"
    consequence: "Core saturation due to excessive primary current exceeding B-H curve linear region, insulation breakdown from partial discharge exceeding Paschen's law threshold, thermal runaway from I²R losses exceeding heat dissipation capacity"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Primary current exceeding 120% rated value for &gt;10 seconds"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install saturable core reactor with knee-point at 1.2× rated current"
  - node_2:
      trigger: "Moisture ingress exceeding 85% relative humidity for &gt;24 hours"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hermetic sealing with IP68 rating and silica gel desiccant"
bom_nodes:
  core:
    type: "component"
    urn: "URN:CNFX:ME:CORE"
    interface_type: "physical-logic-coupled"
  primary-windingconductor:
    type: "component"
    urn: "URN:CNFX:ME:PRIMARY_WINDINGCONDUCTOR"
    interface_type: "physical-logic-coupled"
  secondary-winding:
    type: "component"
    urn: "URN:CNFX:ME:SECONDARY_WINDING"
    interface_type: "physical-logic-coupled"
  insulation:
    type: "component"
    urn: "URN:CNFX:ME:INSULATION"
    interface_type: "physical-logic-coupled"
  terminal-block:
    type: "part"
    urn: "URN:CNFX:ME:TERMINAL_BLOCK"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "IEC 61869-2:2012 (INSTRUMENT TRANSFORMERS - PART 2: ADDITIONAL REQUIREMENTS FOR CURRENT TRANSFORMERS)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI C57.13-2016 (IEEE STANDARD REQUIREMENTS FOR INSTRUMENT TRANSFORMERS)"
    scope: "Verified Engineering Specification"
  - standard: "DIN EN 60044-1:2000 (INSTRUMENT TRANSFORMERS - PART 1: CURRENT TRANSFORMERS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/electrical-equipment-manufacturing/product/current-transformer.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "ab9b117f1c4a53e1ad89d42ccf94f2a2247b9e633117d264e7ff67d7d3e05930"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Current Transformer

## 1. Technical Definition
A device that transforms high primary current into a lower, proportional secondary current for measurement and protection purposes.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-100 kA primary current, 1-5 A secondary current, -40°C to +85°C ambient temperature**. Failure boundary: **Core saturation at 1.8 T magnetic flux density, insulation breakdown at 3 kV/mm electric field strength, thermal runaway at 150°C winding temperature**, Mechanism: **Core saturation due to excessive primary current exceeding B-H curve linear region, insulation breakdown from partial discharge exceeding Paschen's law threshold, thermal runaway from I²R losses exceeding heat dissipation capacity**.

### 2.1 Analytical Physics Model
Governed by the **Joule Heating & Thermal Resistance**:

> **Primary Equation**: $P = I^2 R = \frac{V^2}{R}$  
> **Engineering Impact**: Governs heating element sizing for shrink tunnels/sealers.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| I | Current | Engineering Constant |
| R | Resistance | Engineering Constant |
| V | Voltage | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Primary current exceeding 120% rated value for &gt;10 seconds | 8 | Core saturation causing nonlinear transformation ratio &gt;±10% error | Install saturable core reactor with knee-point at 1.2× rated current |
| Moisture ingress exceeding 85% relative humidity for &gt;24 hours | 8 | Insulation resistance dropping below 100 MΩ at 500 V DC | Hermetic sealing with IP68 rating and silica gel desiccant |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | Ratio (e.g., 1000:5) | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Terminal Block](https://cnfx.com/llms/industry/electrical-equipment-manufacturing/product/terminal-block.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Winding Machine**, **Vacuum Impregnation System**, **Calibration Test Bench**  
**Downstream Applications**: Electrical Meters, Protective Relays, Power Quality Analyzers  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What are the key materials used in your current transformers?
**A**: Our current transformers utilize silicon steel laminations for the core, high-purity copper wire for windings, and insulating resin/epoxy for durability and electrical isolation.

### Q: How does a current transformer protect electrical systems?
**A**: Current transformers step down high primary currents to safe, measurable secondary levels, enabling protective relays to detect faults and trigger circuit breakers to prevent equipment damage.

### Q: What components are included in the BOM for your current transformers?
**A**: The bill of materials includes the core, insulation materials, primary winding/conductor, secondary winding, and terminal block for secure electrical connections.

## 6. Manufacturing Compliance
- IEC 61869-2:2012 (INSTRUMENT TRANSFORMERS - PART 2: ADDITIONAL REQUIREMENTS FOR CURRENT TRANSFORMERS)
- ANSI C57.13-2016 (IEEE STANDARD REQUIREMENTS FOR INSTRUMENT TRANSFORMERS)
- DIN EN 60044-1:2000 (INSTRUMENT TRANSFORMERS - PART 1: CURRENT TRANSFORMERS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Current Transformer](https://cnfx.com/industry/electrical-equipment-manufacturing/product/current-transformer)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **5** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: CURRENT_TRANSFORMER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: c01c5db9
