What standards does this relay comply with?

The product complies with IEC 60076-2 and GB/T 7252 standards for safety and performance.

Reliable Double-Float Buchholz Relay for Efficient Transformer Operations

Name: Reliable Double-Float Buchholz Relay for Efficient Transformer Operations
Brand: Bushing(Beijing)Hv Electric Co., Ltd.
SKU: 2091991682

Beijing, ChinaBushing(Beijing)Hv Electric Co., Ltd.

US$85.00

30 Pieces

Product profile

Customization

Available

Theory

Electromagnetic Relay

Usage

Transformer

Model NO.

QJ series

Phase

Electricity Type

Number of Pole

Load

High Power Relay

Protective Characteristics

Open Relay

Action Principle

Electromagnetic Type

Size

Subminiature

Type

Electric Parameter Relay

Temperature Range

-40ºC to 120ºC

Standards

IEC 60076-2, GB/T 7252

Enclosure Rating

IP55

Other Name Type

Double-Float Gas Relay Buchholz Relay

Transport Package

Wooden

Trademark

E-Cloud

Origin

Beijing, China

HS Code

8536490090

Production Capacity

1000

Key features

Dual-Float Protection Mechanism: Upper float alarms for slow gas buildup; lower float trips for rapid oil surge.

Robust IP55 Enclosure Rating: Provides effective protection against dust and water ingress for durability.

Built-in Gas Sampling Capability: Integrated gas vent and sampling box for on-site fault analysis and verification.

Flexible Customization Options: Supports full customization, minor customization, and customization from samples or designs.

Strict Quality Control: 100% visual and functional inspection of finished products by 14 QA/QC inspectors.

Company profile

Importers and ExportersCooperated with Fortune 500High Repeat Buyers ChoiceMulti-language Pioneer

Bushing(Beijing)Hv Electric Co., Ltd.

Beijing, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 9 Years CertifiedNearest Port: Tianjin PortAverage Response Time: ≤0.01h

AI-Powered supplier vetting

SummaryBushing (Beijing) presents itself as an equipment and electronic-product supplier focused on high-end intelligent bushing applications. It holds ISO9001:2015 and ISO14001:2015 certificates, reports documented service, corrective-action, and complaint-handling procedures, and offers OEM, ODM, SDK, and broad customization services. Production evidence includes two production lines, stated HV bushing output of 10,000 pieces, 14 quality assurance and control inspectors, and finished-product inspection instructions. However, the supplier reports no valid manufacturing contract with related subcontractors, no standardized outsourcing procedure, and no ongoing batch quantity reconciliation. It has inventory capability and an overseas showroom but no overseas warehouse. The information indicates innovation, customization, quality-system, and production capabilities, while customer cases and financial credibility remain insufficiently evidenced.

Supplier typeThe supplier operates in equipment manufacturing and related electronic-product, instrument, software, and technical-service activities. Its stated focus on intelligent bushing products, together with reported OEM and ODM services, supports classification as a manufacturer with integrated technical and customization capabilities.

CertificationsThe supplier explicitly reports ISO9001:2015 and ISO14001:2015 certificates, indicating stated certification in quality and environmental management systems.

After-Sales capabilityThe supplier has written and followed procedures for service assessment, corrective and preventive actions, and customer complaints. It also reports inventory capability, an overseas showroom, and defined quotation and payment options, but lacks an overseas warehouse; the documented procedures nevertheless provide explicit evidence of service capability.

R&D capabilityThe supplier reports new products during the past year, ODM service, available SDK support, and technology development, consulting, exchange, and transfer activities. These statements provide explicit evidence of active R&D and technical innovation capability.

Production capacityProduction evidence includes two production lines, stated HV bushing output of 10,000 pieces, 14 quality assurance and control inspectors, finished-product inspection instructions, and inventory capability. However, the supplier reports no valid manufacturing contract with related subcontractors, no outsourcing SOP, and no continuous batch quantity reconciliation, which are material production-control weaknesses.

Customization capabilityThe supplier explicitly offers customization from samples and designs, full, minor, and flexible customization. The same capability is reported in both R&D and design-service information, supporting a broad customization offering.

Product Q&A

Q:How does the double float mechanism work?

The upper float triggers an alarm for slow gas buildup (e.g., partial discharge), while the lower float triggers a trip for rapid oil flow (e.g., internal short circuit).

Q:Can this relay detect all types of transformer faults?

Yes, it identifies thermal faults (overheating causing gas), electrical faults (arcing causing oil surge), and insulation degradation (changes in gas composition).

Q:Is the gas sampling box necessary for operation?

It is recommended to allow for on-site gas collection for lab analysis and fault type verification, such as checking H2 vs. C2H2 ratios.

Q:What maintenance schedule is required?

Perform an annual inspection to check float movement and contacts, and conduct a 5-year calibration to verify gas and oil flow thresholds.

Q:What is the maximum installation tilt angle?

The inclination angle of the axis to the horizontal plane must not exceed 4% to ensure optimal performance.