Description

In hazardous industrial environments, electrical switching equipment must ensure not only operational reliability but also absolute safety under explosive gas conditions. The BHZ8030 series explosion-proof and corrosion-resistant transfer switch is designed to meet these demanding requirements, making it suitable for critical infrastructure across petrochemical, pharmaceutical, military, and energy industries.

1. Application Scope of BHZ8030 Series

The BHZ8030 explosion-proof transfer switch is engineered for use in high-risk environments where explosive gas mixtures may exist.

It is suitable for:

• Zone 1 and Zone 2 explosive gas environments

• IA, IIB, IIC class explosive gas atmospheres

• Temperature groups T1 to T5

• Industrial hazardous locations including:

• Oil refining facilities

• Chemical processing plants

• Pharmaceutical production areas

• Military industrial zones

• Storage and logistics depots for flammable materials

In these environments, equipment reliability directly affects operational safety. The BHZ8030 series ensures controlled switching of electrical circuits while maintaining strict explosion-proof integrity.

2. Functional Capability

The BHZ8030 series is designed to control the on/off switching of:

• 2 circuits or

• 3 circuits

This makes it suitable for multi-load control applications where redundancy or circuit separation is required.

Typical applications include:

• Pump control systems

• Ventilation and exhaust systems

• Lighting distribution in hazardous zones

• Auxiliary industrial equipment switching

The flexibility of circuit control enhances system adaptability in complex industrial environments.

3. Model Selection and Ordering Method

The product model follows a structured coding system that reflects rated current, pole configuration, and functional specifications.

Example Order Code

If a customer requires a BHZ8030 explosion-proof and corrosion-resistant transfer switch with:

• Rated current: 16A

• Pole configuration: 3 poles

The correct order model is:

BHZ8030-16/3

This standardized model naming ensures accurate configuration selection and reduces procurement errors.

4. Product Specifications Overview

BHZ8030-16

• Rated voltage: AC 220/380V

• Rated current: 16A

• Number of inlets: 2

• Inlet specification: G3/4”

• Applicable cable outer diameter: φ9mm – φ14mm

This model is suitable for low-load control circuits in compact industrial systems.

BHZ8030-32

• Rated voltage: AC 220/380V

• Rated current: 32A

• Number of inlets: 2

• Inlet specification: G1”

• Applicable cable outer diameter: Φ11mm – Φ18mm

This configuration is commonly used in medium-power industrial equipment control systems.

BHZ8030-63

• Rated voltage: AC 220/380V

• Rated current: 63A

• Number of inlets: 2

• Inlet specification: G1 1/2”

• Applicable cable outer diameter: Φ17mm – Φ28mm

This version is designed for high-load industrial applications requiring robust current handling capability.

5. Structural and Material Features

The BHZ8030 series is designed with enhanced safety and durability in mind.

Key Structural Features

• Increased safety enclosure design

• Manufactured using glass fiber reinforced unsaturated polyester resin

• Excellent corrosion resistance

• Strong impact resistance

• Stable thermal performance under harsh conditions

These properties ensure long-term reliability even in chemically aggressive or mechanically demanding environments.

6. Sealing and Protection Design

The enclosure adopts a curved sealing structure, which significantly improves environmental protection performance.

Advantages include:

• High-level waterproof performance

• Effective dust protection

• Enhanced sealing stability under vibration

• Improved long-term environmental resistance

The overall protection rating reaches:

• IP65 protection level

This ensures reliable operation in outdoor and industrial environments exposed to dust, moisture, and chemical particles.

7. Explosion-Proof Switching Mechanism

The internal switching mechanism uses a flameproof design, ensuring safe operation in hazardous gas environments.

Features:

• Built-in flameproof switch module

• Available in 2-pole and 3-pole configurations

• Stable arc suppression performance

• Reliable switching under load conditions

This design ensures that internal electrical arcs are safely contained, preventing ignition of surrounding explosive atmospheres.

8. Wiring and Installation Flexibility

The BHZ8030 series supports multiple wiring methods:

• Steel pipe wiring

• Cable wiring

This flexibility allows installation across different industrial layouts and infrastructure designs.

It also supports a wide range of cable diameters depending on model selection, ensuring compatibility with diverse engineering requirements.

9. Technical Standards Compliance

The BHZ8030 series is manufactured in strict accordance with international safety standards.

Standards include:

• GB 3836.1

• GB 3836.2

• GB 3836.3

• IEC 60079

Explosion-proof marking:

• Ex ed IIC T5

Corrosion resistance grade:

• WF2

These certifications ensure compliance with both domestic and international hazardous area equipment requirements.

10. Industrial Application Value

The BHZ8030 explosion-proof transfer switch is widely used in critical industrial sectors where safety and reliability are non-negotiable.

Key application benefits:

• Safe circuit switching in explosive environments

• Reduced risk of electrical ignition

• High resistance to corrosion and environmental degradation

• Stable performance under continuous industrial operation

• Flexible configuration for different load requirements

Its robust design makes it suitable for both new installations and system upgrades in hazardous industrial zones.

Conclusion

The BHZ8030 series explosion-proof and corrosion-resistant transfer switch is a reliable solution for electrical control in hazardous environments. With its reinforced structural design, flameproof switching mechanism, high protection rating, and compliance with international explosion-proof standards, it ensures safe and stable operation across multiple industrial sectors.

By offering flexible current ratings, multi-circuit control capability, and durable material construction, the BHZ8030 series provides engineers with a dependable choice for critical power distribution in explosive gas environments.

Type meaning

Example: If you need to order a BHZ 8030 explosion-proof and corrosion-resistant transfer switch with a rated current of 16 A and 3 poles, the order model number is " BHZ 8030-16 /3".
Selection table

BHZ8030-16	Rated voltage: AC 220/380V Rated current: 16A Number of inlets: 2 Inlet specifications: G3/4” Applicable cable outer diameter: φ9mm~φ14mm
BHZ8030-32	Rated voltage: AC 220/380V Rated current: 32A Number of inlets: 2 Inlet specification: G1" Applicable cable outer diameter: Φ11mm~Φ18mm
BHZ8030-63	Rated voltage: AC 220/380V Rated current: 63A Number of inlets: 2 Inlet specification: G1'/2" Applicable cable outer diameter: Φ17mm~φ28mm

Feature

◆The shell is an increased safety structure, made of glass fiber reinforced unsaturated polyester resin, with excellent properties such as corrosion resistance, impact resistance and good thermal stability ;

◆Adopting curved sealing structure design, it has good waterproof and dustproof performance;

◆The built-in switch is a flameproof switch, with 2-pole and 3-pole switches available;

◆Steel pipe or cable wiring.

Technical parameter

◆Implementation standard: GB 3836.1, GB 3836.2, GB 3836.3、IEC60079

◆Explosion-proof mark: Exed II CT 5

◆Protection level: IP65

◆Corrosion resistance grade: WF2

Appearance&installation dimensions