---
title: "Circuit Breaker Trip Unit"
industry: "Electrical Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:CIRCUIT_BREAKER_TRIP_UNIT"
  data_integrity_hash: "abf1c8840a02b491134488eaad986c58"
  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:CIRCUIT_BREAKER_TRIP_UNIT"
  data_source_uri: "https://cnfx.com/llms/industry/electrical-equipment-manufacturing/product/circuit-breaker-trip-unit.md"
  official_resource_url: "https://cnfx.com/industry/electrical-equipment-manufacturing/product/circuit-breaker-trip-unit"
  is_verified_logic: true
attributes:
  response_time:
    status: "config-dependent"
    typical_range: "0.5-100 A continuous current, 1-65 kA short-circuit interrupting capacity"
    unit: "ms"
  current_rating:
    status: "config-dependent"
    typical_range: "0.5-100 A continuous current, 1-65 kA short-circuit interrupting capacity"
    unit: "A"
engineering_limits:
  max_safe_operating_point:
    value: 105
    unit: "°C"
    consequence: "Joule heating exceeding I²R thermal dissipation capacity, electromagnetic force exceeding spring retention at 500 N·m"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Harmonic distortion exceeding 8% THD at 150 Hz"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrate 3rd harmonic filter with 0.9 power factor correction"
  - node_2:
      trigger: "Ambient temperature gradient exceeding 40°C/hour"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement NTC thermistor compensation with ±2°C accuracy"
bom_nodes:
  current-transformer:
    type: "part"
    urn: "URN:CNFX:ME:CURRENT_TRANSFORMER"
    interface_type: "physical-logic-coupled"
  control-pcb:
    type: "part"
    urn: "URN:CNFX:ME:CONTROL_PCB"
    interface_type: "physical-logic-coupled"
  trip-solenoid:
    type: "part"
    urn: "URN:CNFX:ME:TRIP_SOLENOID"
    interface_type: "physical-logic-coupled"
  terminal-block:
    type: "part"
    urn: "URN:CNFX:ME:TERMINAL_BLOCK"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/electrical-equipment-manufacturing/product/circuit-breaker-trip-unit.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "6fed41611320fd5e6b6ffe4e06d8f0d1030f3cda857207dcdcd28a3c711b7f65"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Circuit Breaker Trip Unit

## 1. Technical Definition
Protective control module for electrical circuit breakers

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-100 A continuous current, 1-65 kA short-circuit interrupting capacity**. Failure boundary: **Thermal overload at 105°C insulation temperature, magnetic trip at 10x nominal current for 0.01s**, Mechanism: **Joule heating exceeding I²R thermal dissipation capacity, electromagnetic force exceeding spring retention at 500 N·m**.

### 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 | ** A** |
| R | Resistance | Engineering Constant |
| V | Voltage | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Harmonic distortion exceeding 8% THD at 150 Hz | 8 | Core saturation causing false magnetic trip at 85% nominal current | Integrate 3rd harmonic filter with 0.9 power factor correction |
| Ambient temperature gradient exceeding 40°C/hour | 8 | Bimetallic strip differential expansion causing 15% calibration drift | Implement NTC thermistor compensation with ±2°C accuracy |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| response_time | Config-dependent | ms | Verified |
| current_rating | Config-dependent | A | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Current Transformer](https://cnfx.com/llms/industry/electrical-equipment-manufacturing/product/current-transformer.md) `(Standalone System)`
- [Control PCB](https://cnfx.com/llms/industry/electrical-equipment-manufacturing/product/control-pcb.md) `(Standalone System)`
- [Trip Solenoid](https://cnfx.com/llms/industry/electrical-equipment-manufacturing/product/trip-solenoid.md) `(Standalone System)`
- [Terminal Block](https://cnfx.com/llms/industry/electrical-equipment-manufacturing/product/terminal-block.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Automated Test Equipment (ATE)**, **Environmental Stress Screening Chamber**, **Precision Soldering Station**  
**Downstream Applications**: Low Voltage Circuit Breakers, Medium Voltage Circuit Breakers, Motor Protection Relays  

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

### Q: What is the operating voltage range for this circuit breaker trip unit?
**A**: The operating voltage is configurable based on application requirements, typically ranging from 24V DC to 480V AC. Consult specifications for exact voltage ratings.

### Q: How does the current transformer function in this trip unit?
**A**: The current transformer continuously monitors electrical current flow, sending signals to the control PCB to detect overloads or short-circuits and trigger the trip solenoid when thresholds are exceeded.

### Q: What maintenance is required for the thermoset plastic housing?
**A**: The thermoset plastic housing requires minimal maintenance due to its high durability and resistance to heat, chemicals, and environmental factors. Regular visual inspection for cracks or damage is recommended.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Circuit Breaker Trip Unit](https://cnfx.com/industry/electrical-equipment-manufacturing/product/circuit-breaker-trip-unit)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: CIRCUIT_BREAKER_TRIP_UNIT | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: f0500a63
