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Xiangjing (Shanghai) M&E Technology Co., Ltd

  • China,Shanghai ,Shanghai
  • Verified Supplier
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China Qualitrol 900 910 Rapid Pressure Rise Relay Transformer Protection Oil Filled
China Qualitrol 900 910 Rapid Pressure Rise Relay Transformer Protection Oil Filled

  1. China Qualitrol 900 910 Rapid Pressure Rise Relay Transformer Protection Oil Filled
  2. China Qualitrol 900 910 Rapid Pressure Rise Relay Transformer Protection Oil Filled
  3. China Qualitrol 900 910 Rapid Pressure Rise Relay Transformer Protection Oil Filled
  4. China Qualitrol 900 910 Rapid Pressure Rise Relay Transformer Protection Oil Filled

Qualitrol 900 910 Rapid Pressure Rise Relay Transformer Protection Oil Filled

  1. MOQ:
  2. Price: US $500.00 - 1200.00/ Set
  3. Get Latest Price
Packaging Details Cardboard box/Wooden crate
Application Power Transformers, Distribution Transformers, Industrial Electrical Equipment
Thread Connection 2-1/2"-8 NPT Male Thread
Payment Terms T/T
Series 900 (Oil-Filled Transformers) / 910 (Gas-Filled Transformers)
Mounting Style Flange Mount or Thread Mount
Delivery Time 6-8 weeks
Switch Rating (AC) 10 A @ 120, 240 & 480 VAC
Pressure Range (Sensing Bellows) -14.7 to 20 PSIG (-1.0 to 1.4 bar)
Supply Ability 500 sets per year
Power Factor (AC) 0.75
Switch Rating (DC) 0.5 A @ 125 VDC (Resistive); 0.25 A @ 250 VDC (Resistive)
Operating Temperature -40°C to +82°C (-40°F to +180°F)
Function Detects rapid pressure rise and provides alarm or trip signal
Ingress Protection IP65 (Standard)
Model Number 900/910
Place of Origin USA
Brand Name Qualitrol

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  1. Product Details
  2. Company Details

Product Specification

Packaging Details Cardboard box/Wooden crate Application Power Transformers, Distribution Transformers, Industrial Electrical Equipment
Thread Connection 2-1/2"-8 NPT Male Thread Payment Terms T/T
Series 900 (Oil-Filled Transformers) / 910 (Gas-Filled Transformers) Mounting Style Flange Mount or Thread Mount
Delivery Time 6-8 weeks Switch Rating (AC) 10 A @ 120, 240 & 480 VAC
Pressure Range (Sensing Bellows) -14.7 to 20 PSIG (-1.0 to 1.4 bar) Supply Ability 500 sets per year
Power Factor (AC) 0.75 Switch Rating (DC) 0.5 A @ 125 VDC (Resistive); 0.25 A @ 250 VDC (Resistive)
Operating Temperature -40°C to +82°C (-40°F to +180°F) Function Detects rapid pressure rise and provides alarm or trip signal
Ingress Protection IP65 (Standard) Model Number 900/910
Place of Origin USA Brand Name Qualitrol
High Light Qualitrol 900 rapid pressure rise relay910 transformer protection relayoil filled transformer pressure monitoring
Qualitrol 900/910 Sudden Pressure Relay
Product Overview

The Qualitrol 900/910 Sudden Pressure Relay provides fast detection of rapid pressure rise inside liquid-immersed power transformers. Available in top-mounted (900) and side-mounted (910) configurations, it offers reliable mechanical operation to signal potential faults and help prevent catastrophic failures.

Technical Specifications
Parameter Specification
Models 900 (top mounted), 910 (side mounted)
Function Sudden pressure rise detection
Application Liquid-immersed power transformers
Operation Mechanical actuation on rapid pressure increase
Mounting Options Top or side mounted
Alarm / Trip Provides alarm or trip signal
Design Robust mechanical construction
Application Industry
  • Power generation and utilities
  • Electrical transmission and distribution
  • Transformer manufacturing and maintenance
  • Industrial power systems
  • Substation protection
Common Problems & Solutions
  • Problem: Delayed fault detection → Solution: Rapid response to sudden pressure rise
  • Problem: Installation limitations → Solution: Available in top and side mounted versions
  • Problem: Reliability in harsh environments → Solution: Proven mechanical design for transformers
Replacement Models
  • Older Qualitrol sudden pressure relays
  • Other transformer protection devices
Why Buy From Us
  • Genuine Qualitrol 900/910 relays with factory support
  • Competitive pricing for critical protection equipment
  • Technical assistance for selection and installation
  • Reliable spare parts availability
Stock & Delivery Time
  • Standard models: 6–8 weeks typical
  • Special configurations: 6–12 weeks
RFQ Form

Please provide:

  • Transformer type and mounting preference (900 or 910)
  • Required pressure settings
  • Application details
  • Quantity & target delivery date

Company Details

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 and 

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 from Quality China Factory
  • Business Type:

    Manufacturer,Distributor/Wholesaler,Agent,Importer,Exporter,Trading Company,Seller,Other

  • Year Established:

    2015

  • Total Annual:

    30,000,000-50,000,000

  • Employee Number:

    200~300

  • Ecer Certification:

    Verified Supplier

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  • Xiangjing (Shanghai) M&E Technology Co., Ltd
  • No.6 Building,No.98 Lane, No.1 Fulian Road, Baoshan District, Shanghai, China
  • https://www.shgongboshi.com/

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