---
title: "Medium Voltage Vacuum Interrupter Module"
industry: "Manufacture of Electricity Distribution and Control Apparatus"
verification_protocol:
  urn: "URN:CNFX:ME:MEDIUM_VOLTAGE_VACUUM_INTERRUPTER_MODULE"
  data_integrity_hash: "142708097a6d4fb290056df85866afb2"
  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:MEDIUM_VOLTAGE_VACUUM_INTERRUPTER_MODULE"
  data_source_uri: "https://cnfx.com/llms/industry/manufacture-electricity-distribution-control-apparatus/product/medium-voltage-vacuum-interrupter-module.md"
  official_resource_url: "https://cnfx.com/industry/manufacture-electricity-distribution-control-apparatus/product/medium-voltage-vacuum-interrupter-module"
  is_verified_logic: true
attributes:
  primary_spec:
    status: "config-dependent"
    typical_range: "3.6-40.5 kV, 630-3150 A, 16-31.5 kA breaking capacity"
    unit: "kV"
  secondary_spec:
    status: "config-dependent"
    typical_range: "3.6-40.5 kV, 630-3150 A, 16-31.5 kA breaking capacity"
    unit: "kA"
engineering_limits:
  max_safe_operating_point:
    value: 8
    unit: "mm"
    consequence: "Dielectric breakdown at Paschen minimum (0.75 kV/mm in vacuum), contact welding due to joule heating (R=50 μΩ), outgassing from contact materials (CuCr 25/75)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "High di/dt (1000 A/μs) during capacitive switching"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Controlled closing mechanism with 2 m/s contact velocity and 15° pre-strike angle"
  - node_2:
      trigger: "Chopping current &gt; 5 A at current zero"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Low-chopping contact material (WCu 30/70) with 1500 J/g heat capacity"
bom_nodes:
  vacuum-chamber:
    type: "device"
    urn: "URN:CNFX:ME:VACUUM_CHAMBER"
    interface_type: "physical-logic-coupled"
  moving-contact:
    type: "component"
    urn: "URN:CNFX:ME:MOVING_CONTACT"
    interface_type: "physical-logic-coupled"
  fixed-contact:
    type: "component"
    urn: "URN:CNFX:ME:FIXED_CONTACT"
    interface_type: "physical-logic-coupled"
  metal-bellows:
    type: "component"
    urn: "URN:CNFX:ME:METAL_BELLOWS"
    interface_type: "physical-logic-coupled"
  shield-assembly:
    type: "component"
    urn: "URN:CNFX:ME:SHIELD_ASSEMBLY"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/manufacture-electricity-distribution-control-apparatus/product/medium-voltage-vacuum-interrupter-module.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "e44a80cfc2e14d7ad27d54d2dc4afedab324ad88a9a3801a75a1b70b3c647343"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Medium Voltage Vacuum Interrupter Module

## 1. Technical Definition
Core vacuum switching component for medium voltage circuit breakers and contactors.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **3.6-40.5 kV, 630-3150 A, 16-31.5 kA breaking capacity**. Failure boundary: **Contact gap &lt; 8 mm at 40.5 kV, vacuum pressure &gt; 1e-3 mbar, contact temperature &gt; 650°C**, Mechanism: **Dielectric breakdown at Paschen minimum (0.75 kV/mm in vacuum), contact welding due to joule heating (R=50 μΩ), outgassing from contact materials (CuCr 25/75)**.

### 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 |
| :--- | :--- | :--- | :--- |
| High di/dt (1000 A/μs) during capacitive switching | 8 | Pre-strike arc formation before contact closure | Controlled closing mechanism with 2 m/s contact velocity and 15° pre-strike angle |
| Chopping current &gt; 5 A at current zero | 8 | Voltage escalation to 2.5× system voltage | Low-chopping contact material (WCu 30/70) with 1500 J/g heat capacity |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| primary_spec | Config-dependent | kV | Verified |
| secondary_spec | Config-dependent | kA | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Vacuum Chamber](https://cnfx.com/llms/industry/basic-metal-manufacturing/product/vacuum-chamber.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Vacuum Pump System**, **High Voltage Test Bench**, **Clean Room Assembly Station**  
**Downstream Applications**: Medium Voltage Circuit Breakers, Medium Voltage Contactors, Switchgear Assemblies  

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

### Q: What is the typical breaking capacity range for medium voltage vacuum interrupter modules?
**A**: Breaking capacity typically ranges from 12.5kA to 40kA depending on the specific application and voltage rating, with higher capacities available for specialized industrial uses.

### Q: How does the vacuum pressure affect the performance and lifespan of the interrupter?
**A**: Maintaining vacuum pressure below 10^-3 Pa is critical for reliable arc extinction and long service life. Proper vacuum levels ensure dielectric strength and prevent contact oxidation during switching operations.

### Q: What maintenance is required for vacuum interrupter modules in circuit breakers?
**A**: Vacuum interrupters are maintenance-free sealed units. Regular inspection of mechanical linkages and contact wear indicators is recommended, but the vacuum chamber itself requires no servicing under normal operating conditions.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Medium Voltage Vacuum Interrupter Module](https://cnfx.com/industry/manufacture-electricity-distribution-control-apparatus/product/medium-voltage-vacuum-interrupter-module)**

### 🌐 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**: MEDIUM_VOLTAGE_VACUUM_INTERRUPTER_MODULE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 2d2319ea
