Flameproof Explosion-Proof Receptacle 21E-RP – Miyaki Electric

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Introduction

The Flameproof Explosion-Proof Receptacle 21E-RP by Miyaki Electric is engineered for hazardous industrial environments where safety, durability, and operational reliability are critical. Designed under strict Japanese industrial standards, this 30A receptacle ensures secure electrical connectivity in explosive atmospheres such as oil & gas, petrochemical, marine, and heavy industrial facilities.

This solution aligns with Nichiboku Ltd.’s objective of delivering high-performance Japanese industrial equipment to global markets with full technical and application support.

Explosion-proof receptacle by Miyaki Electric, designed for hazardous industrial environments, Model 21E-RP, with a 30A rating and D2G4 certification, ensuring safety and reliability under Japanese standards.

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Industrial Safety Design – Flameproof Explosion-Proof Receptacle

The Flameproof Explosion-Proof Receptacle 21E-RP is built with a flameproof enclosure (d2G4 classification), preventing ignition of surrounding hazardous gases. Its mechanical and electrical design ensures safe operation even under demanding industrial conditions.

Key Technical Features

Parameter	Specification
Explosion-proof rating	d2G4
Rated voltage	AC 440V
Rated current	30A
Receptacle material	Aluminum die-cast (ADC10)
Internal conductive parts	Copper alloy (AC4C)
Surface treatment	Corrosion-resistant coating (5Y7/1 equivalent)
Receptacle weight	Approx. 3.8 kg
Plug weight	Approx. 1 kg

Operational Safety Mechanism (Interlock System)

A critical feature of the Flameproof Explosion-Proof Receptacle 21E-RP is its integrated interlock mechanism:

• Plug removal is only possible when the switch is in the OFF position

• Prevents arc discharge during operation

• Enhances operator safety in explosive environments
  

Configuration and Connectivity Options

The 21E-RP series supports multiple configurations to meet different industrial load requirements:

Model Variant	Configuration	Application Scope
21E-RP330	3P + 1P + Ground	Standard industrial equipment
21E-RP430	4P + 1P + Ground	Extended control systems
21E-RP630	6P + 1P + Ground	Complex multi-phase systems

Installation and Cable Specifications

Parameter	Specification
Inlet connection	G3/4 (22mm)
Optional sizes	16mm / 28mm
Cable outer diameter	7.0 – 20 mm
Grounding structure	Integrated (plug side bell mouth design)

The design supports flexible installation across different industrial infrastructures while maintaining sealing integrity and explosion-proof compliance.

Industrial Applications

The Flameproof Explosion-Proof Receptacle 21E-RP by Miyaki Electric is widely used in:

• Oil & Gas Processing Facilities

• Petrochemical Plants

• Marine & Shipbuilding Industry

• Power Generation Plants

• Hazardous Zone Manufacturing
  

Nichiboku Worldwide Supply Support

Nichiboku Ltd. provides global supply support for Japanese industrial products, ensuring reliable distribution and after-sales assistance worldwide.

➡️ Get global supply support ➡️ Inquire about international shipping and product availability ➡️ Partner with Nichiboku for worldwide industrial solutions

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