YHT300A Camera Cover, ExResistTel IP2 Telephone & TTC-S310 Controller

Product Introduction: Premium Spares for Explosion-Proof Security, Alarm Systems & Dry-Type Transformer Temperature Control

This document focuses on the supply of high-quality, OEM-compatible spare parts specifically designed for explosion-proof security systems, weatherproof alarm equipment, and dry-type transformer temperature control. The product lineup covers critical components across four core categories: explosion-proof/weatherproof security cameras (YHT300A explosion-proof all-weather camera protective cover, YHV55-HP0 stainless steel high speed dome camera, YHW220-IR explosion-proof integrated infrared high-definition camera, etc.), explosion-proof/weatherproof alarm & communication devices (Explosionproof VoIP Telephone ExResistTel IP2 for zone 1 + 21, dEV 20 Ex de sounder, XB12 21 Joule Xenon Beacons, etc.), security system accessories (KJ2028E explosion-proof control box, IVM810 Network Virtual Matrix, YHZ-B7 mounting bracket, etc.), and dry-type transformer temperature controllers (TTC-310 thermostat, TTC-315A4 Thermostat, TTC-S310 Dry Type Transformer Temperature Controller). All parts are engineered to meet ATEX, IEC Ex, JB/T 7631-2016, ISO 9001:2016, and IP protection standards (IP65/IP66), ensuring precise compatibility, reliable performance, and compliance with safety regulations for hazardous and harsh environments. Our core purpose is to deliver durable, high-performance spares that resolve common security, alarm, and temperature control failures, minimize unplanned downtime, and maintain the safety, efficiency, and operational integrity of critical systems—critical for oil and gas facilities, chemical plants, rail transit, power stations, marine environments, and industrial sites where system failure can lead to safety hazards, property loss, or operational disruption.

Core Purpose & Target User Needs

Explosion-proof security systems, weatherproof alarm devices, and dry-type transformer temperature controllers are essential for maintaining safety, security, and operational stability in hazardous and harsh environments. Security cameras and protective covers ensure 24/7 monitoring in explosive or harsh areas; alarm devices and communication tools provide timely alerts and reliable communication in emergencies; temperature controllers prevent transformer overheating (a leading cause of power system failure). Target users—industrial facility maintenance teams, oil and gas security managers, power station technicians, chemical plant safety officers, and marine operations personnel—face persistent pain points that directly impact safety and operational efficiency: incompatible spares leading to system malfunctions (e.g., YHT300A camera cover not fitting YHW220-IR cameras), non-explosion-proof components violating safety regulations in Zone 1/2/21/22 hazardous areas, substandard temperature controllers with poor accuracy (resulting in transformer overheating or energy waste), difficulty sourcing specialized parts (e.g., ExResistTel IP2 explosion-proof VoIP telephone, TTC-S310 dry-type transformer temperature controller), and faulty alarm devices failing to trigger in emergencies (risking safety hazards). Additionally, harsh environmental conditions (dust, moisture, extreme temperatures, vibration) cause rapid wear of standard components, leading to frequent replacements and extended downtime. Our spare parts lineup directly addresses these challenges by offering 100% compatible, certified components that match the original equipment’s specifications. Whether you need a replacement explosion-proof camera cover, alarm sounder, temperature controller, or communication device, our products ensure easy installation, long service life, and compliance with industry standards—keeping your security, alarm, and temperature control systems running reliably and safely.

Product Line Details

1. Explosion-Proof & Weatherproof Security Cameras & Accessories

Our security camera lineup includes a comprehensive range of explosion-proof, weatherproof, and specialized cameras, along with protective covers and mounting accessories, such as the YHT300A explosion-proof all-weather camera protective cover, YHV55-HP0 stainless steel high speed dome camera, YHW220-IR explosion-proof integrated infrared high-definition camera, MCS7 Ex d fixed camera station, XT26 Explosion Protected Analogue PTZ Camera Station with Integral Illumination, Crane Camera CT30EX, SC40 Analogue PTZ Camera Station, XP26 Explosion Protected Analogue PTZ Camera Station, Camera Station EX291, FSYT-6 infrared smart camera, FSYT-2 fully sealed integrated camera, SF26/SAF26 Safe Area Analogue Fixed Zoom Camera Station, XF40-Di Explosion Protected Dual Imaging Fixed Camera Station, SP40-H Analogue-IP Hybrid PTZ Camera Station, XP40-P Explosion Protected Analogue PTZ Camera Station, XP40-Ti Explosion Protected Thermal Imaging PTZ Camera Stations, SF40-Di Dual Imaging Fixed Camera Station, YHQ50 explosion-proof ball machine, YHZ-B7 mounting bracket, and YHNGd explosion-proof flexible pipe. These components are designed to provide 24/7 monitoring in hazardous and harsh environments, ensuring clear imaging and reliable performance.

Function Description

Security cameras and accessories work together to capture clear, high-quality video footage for monitoring, security, and operational oversight. The YHT300A explosion-proof all-weather camera protective cover shields cameras from dust, moisture, impact, and explosive atmospheres, ensuring camera functionality in harsh conditions. The YHV55-HP0 stainless steel high speed dome camera offers 360° pan and tilt capabilities (up to 300°/s) with high-definition imaging (1080P/4K) for wide-area monitoring. The YHW220-IR explosion-proof integrated infrared camera provides night vision up to 100 meters, ensuring clear imaging in low-light or no-light environments. PTZ camera stations (XT26, XP26, XP40-P) allow remote control of camera movement and zoom, while thermal imaging models (XP40-Ti) detect heat signatures, ideal for fire detection or perimeter security. Fixed camera stations (MCS7 Ex d, SF26/SAF26) offer stable, continuous monitoring for specific areas, and crane cameras (CT30EX) are designed for heavy-industry environments (e.g., ports, construction) with anti-vibration features. The YHNGd explosion-proof flexible pipe protects camera cables from damage, while the YHZ-B7 mounting bracket ensures secure installation in hazardous areas. All cameras are compatible with DVR systems (e.g., INSC1032-1A DVR) for video recording and playback.

Structural Features

All explosion-proof cameras and accessories feature rugged, corrosion-resistant construction to withstand harsh environments. The YHT300A camera cover is made of 316L stainless steel with an Ex d explosion-proof rating, IP66 protection against dust and water, and impact resistance up to IK10. The YHV55-HP0 dome camera has a 316L stainless steel housing, anti-fog and anti-glare lens, and a sealed motor for smooth pan/tilt operation. The YHW220-IR camera integrates infrared LEDs (wavelength 850nm) with a high-sensitivity image sensor, providing clear night vision without visible light. PTZ camera stations (XT26, XP40-P) have a robust pan/tilt mechanism with a service life of 50,000+ cycles, and thermal imaging models (XP40-Ti) feature a thermal sensor with a resolution of 320×240 pixels and a temperature measurement range of -20℃ to +550℃. The YHNGd explosion-proof flexible pipe is made of stainless steel with a flexible design, allowing easy routing of cables in tight spaces, and the YHZ-B7 mounting bracket is constructed from carbon steel with a powder-coated finish for corrosion resistance. All cameras meet ATEX and IEC Ex standards for Zone 1/2/21/22 hazardous areas, ensuring safe operation in explosive atmospheres.

Applicable Working Conditions

Our security cameras and accessories are tailored to diverse hazardous and harsh environments: explosion-proof models (YHT300A, YHW220-IR, MCS7 Ex d, XT26) are suitable for Zone 1/2 (flammable gases) and Zone 21/22 (combustible dust) areas, such as oil refineries, chemical plants, and gas storage facilities, operating in temperatures ranging from -40℃ to +70℃. Weatherproof models (SF26/SAF26, FSYT-2) are ideal for outdoor environments (e.g., rail transit stations, ports) with IP65/IP66 protection against rain, dust, and snow. Crane cameras (CT30EX) withstand high vibration (up to 5g) and heavy industrial conditions, while thermal imaging cameras (XP40-Ti) are used for fire detection and perimeter security in low-visibility environments. All components operate reliably in humidity up to 95% (non-condensing) and are resistant to corrosion, impact, and electromagnetic interference (EMI), ensuring consistent performance in the most challenging environments.

2. Explosion-Proof & Weatherproof Alarm, Signalling & Communication Devices

Our alarm and communication lineup includes explosion-proof and weatherproof devices such as the Explosionproof VoIP Telephone ExResistTel IP2 for zone 1 + 21, Weatherproof Multi Colour LED Light AvtiveLine GH2, Weatherproof Sounder-Strobe light-Combination AXL05, Weatherproof Sounder AX05, Weatherproof Rotating Beacon SLD2/SLD1, Weatherproof Strobe Light Profi Flash/BLK, Weatherproof Obstruction Light SkyLine Alpha 1, Explosionproof Signalling Hooter dGH21 for Zone 1+21, Explosionproof Signalling Hooter mHP12 for Zone 1+2, XB12 21 Joule Xenon Beacons Exd, Weatherproof, Sonix Ex Bec 2 Ex 5j Xenon Flashing Beacon, DB15 Up to 117dB(A) Harsh Industrial & Marine Environments, DB5 Up to 103 dB(A)-Intrinsically Safe (Exia), Weatherproof, dEV 20 Ex de sounder-up to 115 dB(A), and IMCOS 5253 Wall Loudspeaker. These devices provide timely alerts, clear communication, and visual signalling in hazardous and harsh environments.

Function Description

Alarm and communication devices play a critical role in ensuring safety by providing timely alerts, emergency communication, and visual signalling. The Explosionproof VoIP Telephone ExResistTel IP2 allows reliable communication in Zone 1+21 hazardous areas, supporting VoIP calls with noise cancellation (up to 85dB background noise) for clear audio. Weatherproof sounders (AX05, dEV 20) and sounder-strobe combinations (AXL05) emit loud alerts (up to 117dB for DB15) to notify personnel of emergencies, while rotating beacons (SLD1/SLD2) and strobe lights (Profi Flash, BLK) provide visual alerts in low-visibility conditions. Xenon beacons (XB12, Sonix Ex Bec 2) emit bright, high-intensity flashes (21 Joules for XB12, 5 Joules for Sonix Ex Bec 2) for long-distance visibility. The Weatherproof Obstruction Light SkyLine Alpha 1 is used to mark tall structures (e.g., chimneys, towers) for aviation safety, while the IMCOS 5253 Wall Loudspeaker provides clear public address announcements in industrial and marine environments. All devices are designed to work together, ensuring comprehensive emergency alerting and communication.

Structural Features

All alarm and communication devices feature rugged, weatherproof, and explosion-proof construction. The ExResistTel IP2 telephone has an Ex d explosion-proof housing (IP66) made of 316L stainless steel, with a dust-proof keypad and hands-free operation. Weatherproof sounders and beacons have IP66 protection, with corrosion-resistant housings (aluminum or stainless steel) and impact resistance up to IK08. The dEV 20 Ex de sounder has an Ex de explosion-proof rating, emitting up to 115dB(A) at 1 meter, with a frequency range of 800-2000Hz for clear audibility. Xenon beacons (XB12, Sonix Ex Bec 2) feature a sealed xenon tube for long service life (10,000+ flashes) and a rugged housing to withstand harsh conditions. The IMCOS 5253 Wall Loudspeaker has a weatherproof design (IP65) with a power rating of 15W, providing clear audio up to 50 meters. All devices meet ATEX, IEC Ex, and EN 54 standards for alarm systems, ensuring reliable performance in hazardous and harsh environments.

Applicable Working Conditions

These alarm and communication devices are suitable for a wide range of hazardous and harsh environments: explosion-proof models (ExResistTel IP2, dGH21, mHP12, XB12) are designed for Zone 1/2/21/22 hazardous areas (oil refineries, chemical plants), operating in temperatures from -30℃ to +60℃. Weatherproof models (AX05, SLD1/SLD2, SkyLine Alpha 1) are ideal for outdoor and marine environments, with IP65/IP66 protection against rain, dust, and salt spray. The DB15 sounder is suitable for harsh industrial and marine environments, withstanding high vibration and extreme temperatures (-40℃ to +80℃). The IMCOS 5253 loudspeaker is used in industrial facilities, rail transit stations, and ports, providing clear public address in noisy environments. All devices operate reliably in humidity up to 95% (non-condensing) and are resistant to corrosion, impact, and EMI.

3. Security System Control & Recording Accessories

Our control and recording lineup includes critical accessories for security systems, such as the KJ2028E explosion-proof control box, IVM810 Network Virtual Matrix, INSC1032-1A DVR, PAS2 Class 1, Division 2, PH1 Exd, Weatherproof, SL15 Exd, Weatherproof, and YHQC-225H high-definition bolt. These components provide control, recording, and secure installation for security and alarm systems.

Function Description

Control and recording accessories are essential for managing security systems, ensuring reliable operation and data storage. The KJ2028E explosion-proof control box houses and protects electrical components (e.g., relays, wiring) in hazardous areas, providing a safe, organized control center for security systems. The IVM810 Network Virtual Matrix allows remote control and management of multiple cameras, enabling operators to monitor and switch between camera feeds in real time. The INSC1032-1A DVR records video footage from cameras (up to 32 channels) with high-definition resolution, supporting playback and storage for security investigations. The PAS2 Class 1, Division 2 device provides intrinsic safety for low-voltage components in hazardous areas, preventing sparks that could ignite flammable gases. The PH1 Exd and SL15 Exd devices are explosion-proof and weatherproof junction boxes, protecting wiring connections from damage and hazardous atmospheres. The YHQC-225H high-definition bolt ensures secure installation of cameras and accessories, with high tensile strength for harsh environments.

Structural Features

The KJ2028E explosion-proof control box has an Ex d explosion-proof rating, IP66 protection, and a 316L stainless steel housing, with a removable cover for easy maintenance. The IVM810 Network Virtual Matrix features a compact design, supporting up to 128 cameras and 32 monitors, with a user-friendly interface for easy operation. The INSC1032-1A DVR has a rugged, fanless design for silent operation, supporting HDD storage up to 16TB and remote access via mobile or desktop devices. The PAS2 Class 1, Division 2 device has an Ex ia intrinsic safety rating, with a compact design and low power consumption. The PH1 Exd and SL15 Exd junction boxes are made of aluminum or stainless steel, with IP66 protection and explosion-proof seals to prevent dust and moisture ingress. The YHQC-225H high-definition bolt is made of high-strength steel, with a corrosion-resistant coating and a tensile strength of 12.9, ensuring secure installation in harsh environments.

Applicable Working Conditions

These control and recording accessories are suitable for hazardous and harsh environments: explosion-proof models (KJ2028E, PH1 Exd, SL15 Exd) are designed for Zone 1/2/21/22 hazardous areas, operating in temperatures from -20℃ to +60℃. The IVM810 Network Virtual Matrix and INSC1032-1A DVR are suitable for industrial control rooms and security centers, operating in temperatures from 0℃ to +50℃. The PAS2 Class 1, Division 2 device is ideal for low-voltage security components in hazardous areas, while the YHQC-225H bolt is used for installing cameras and accessories in outdoor and industrial environments. All components are resistant to dust, moisture, and vibration, ensuring reliable performance in critical security systems.

4. Dry-Type Transformer Temperature Controllers

Our temperature controller lineup includes specialized models for dry-type transformers, such as the TTC-310 thermostat, TTC-315A4 Thermostat, TTC-315R4 Thermostat, TTC-315FF Thermostat, and TTC-S310 Dry Type Transformer Temperature Controller. These controllers are designed to monitor and regulate transformer winding and iron core temperatures, preventing overheating and ensuring long-term stable operation of dry-type transformers in power stations and industrial facilities.

Function Description

Temperature controllers serve as the core of dry-type transformer temperature management, using PT100 platinum resistance sensors (预埋 in transformer windings) to detect temperature changes and trigger protective actions. The TTC-S310 Dry Type Transformer Temperature Controller, compliant with JB/T 7631 standards, monitors three-phase winding temperatures (measurement range -30℃ to 200℃, accuracy ±1℃) and automatically controls cooling fan启停, triggers over-temperature alarms, and activates high-temperature跳闸 to protect the transformer. It features a "black box" function to record the three-phase winding temperatures and operating status before power failure, aiding in troubleshooting. The TTC-310, TTC-315A4, TTC-315R4, and TTC-315FF thermostats offer similar core functions with slight variations: TTC-315A4 provides enhanced anti-interference capabilities, TTC-315R4 supports RS485 remote communication, and TTC-315FF is designed for harsh industrial environments. All models allow manual fan control, fan定时检测 (to prevent rust and blockage), and password-protected temperature setting (to avoid unauthorized adjustments), with preset temperature thresholds (fan start at 100℃, fan stop at 80℃, over-temperature alarm at 130℃, high-temperature跳闸 at 150℃, adjustable within a specified range).

Structural Features

All temperature controllers feature a rugged, dust-proof housing (IP54 protection rating) with an embedded design (opening size 152x77mm) for easy installation in transformer control panels. The TTC-S310 uses advanced RISC single-chip computer technology and I2C storage, ensuring strong anti-interference performance and reliable operation, with a power consumption of less than 8VA and weight under 1kg. The controllers have a clear LED display for real-time temperature monitoring (circularly displaying three-phase temperatures or the highest temperature) and modular design for easy maintenance. They support multiple contact capacities (AC125/10A or AC220/7A for fans, alarms, and tripped) and sensor fault alarm functionality, which triggers an alert and fan startup if a PT100 sensor fails. The TTC-315R4 model includes RS485 communication for remote monitoring and data transmission, while the TTC-315FF features a corrosion-resistant coating for harsh industrial environments. All models meet JB/T 7631-2016 and ISO 9001 standards, ensuring compatibility with dry-type transformers of various sizes.

Applicable Working Conditions

These temperature controllers are specifically designed for dry-type transformers in power stations, industrial facilities, and commercial buildings, operating in environmental temperatures from -10℃ to +55℃, relative humidity 5% to 95%, and atmospheric pressure 60 to 160Kpa. They are compatible with AC170~AC250V (48~60Hz) power supply and work reliably in industrial environments with electromagnetic interference. The TTC-315FF is suitable for harsh industrial areas (e.g., chemical plants, oil refineries) with high dust and moisture levels, while the TTC-S310 and TTC-310 are ideal for standard industrial and commercial dry-type transformers. All models ensure the safe operation of dry-type transformers by preventing overheating, extending transformer service life, and reducing unplanned downtime.

Maintenance & Care Recommendations

Proper maintenance of security, alarm, control, and temperature control spares is essential to extend service life, reduce downtime, and ensure the safe, efficient operation of critical systems. Below are practical, easy-to-follow tips for each component category, tailored to their specific applications and operating environments:

• Security Cameras & Accessories: Inspect cameras (YHV55-HP0, YHW220-IR) and protective covers (YHT300A) monthly for dust, dirt, or damage. Clean camera lenses with a soft, lint-free cloth every 2 weeks to maintain image clarity. Check YHNGd explosion-proof flexible pipes for cracks or damage quarterly, and replace if needed. Lubricate PTZ camera (XT26, XP40-P) pan/tilt mechanisms every 6 months with high-temperature grease. For outdoor cameras, inspect mounting brackets (YHZ-B7) quarterly to ensure they are secure. Test infrared functionality of YHW220-IR cameras monthly in low-light conditions.

• Alarm & Communication Devices: Test sounders (AX05, dEV 20), beacons (SLD1/SLD2, XB12), and strobe lights (Profi Flash) monthly to ensure they function properly. Clean weatherproof housings every 3 months to remove dust and debris. Inspect ExResistTel IP2 telephones quarterly for keypad functionality and audio clarity, and clean the handset with a dry cloth. Replace xenon tubes in XB12 and Sonix Ex Bec 2 beacons every 2 years or when flashes become dim. Check IMCOS 5253 loudspeakers quarterly for audio quality and wiring connections.

• Control & Recording Accessories: Inspect KJ2028E explosion-proof control boxes monthly for dust, moisture, or loose wiring. Clean INSC1032-1A DVR vents every 2 months to prevent overheating, and back up video footage regularly. Test IVM810 Network Virtual Matrix functionality monthly to ensure camera feed switching works smoothly. Check PAS2 Class 1, Division 2 devices quarterly for intrinsic safety compliance. Inspect YHQC-225H bolts quarterly to ensure they are tight and free from corrosion.

• Temperature Controllers: Inspect TTC-S310, TTC-310, and TTC-315A4 controllers monthly for display clarity, sensor connectivity, and alarm functionality. Clean the housing and PT100 sensor probes every 3 months to remove dust and debris, which can affect temperature accuracy. Calibrate the controller annually to ensure measurement accuracy (±1℃) using a calibrated temperature source. Test the "black box" function quarterly to ensure it records temperature data correctly. Check fan control functionality monthly, and verify password protection to prevent unauthorized temperature adjustments. Replace sensors if they show signs of corrosion or damage, and ensure wiring connections are tight to prevent signal loss.

We supply the following spare parts:

YHT300A explosion-proof all-weather camera protective cover

Weatherproof Multi Colour LED Light AvtiveLine GH2

KJ2028E explosion-proof control box

Camera Station PT9

SC40 Analogue PTZ Camera Station

YHV55-HP0 stainless steel high speed dome camera

MCS7 Ex d fixed camera station

Explosionproof VoIP Telephone ExResistTel IP2 for zone 1 + 21

YHNGd explosion-proof flexible pipe

XT26 Explosion Protected Analogue PTZ Camera Station with Integral Illumination

Crane Camera CT30EX

YHZ-B7 mounting bracket

SL15 Exd, Weatherproof

YHW220-IR explosion-proof integrated infrared high-definition camera

Weatherproof Sounder-Strobe light-Combination AXL05

XP26 Explosion Protected Analogue PTZ Camera Station

IVM810 Network Virtual Matrix

Camera Station EX291

Weatherproof Rotating Beacon SLD2

Weatherproof Sounder AX05

PAS2 Class 1, Division 2

FSYT-6 infrared smart camera

Explosionproof Signalling Hooter dGH21 for Zone 1+21

Weatherproof Strobe Light Profi Flash

SF26/SAF26 Safe Area Analogue Fixed Zoom Camera Station in 316L Stainless Steel or 6082 Aluminium

FSYT-2 fully sealed integrated camera

INSC1032-1A DVR

Weatherproof Strobe Light BLK

Weatherproof Obstruction Light SkyLine Alpha 1

SP40-H Analogue-IP Hybrid PTZ Camera Station

IMCOS 5253 Wall Loudspeaker

Weatherproof Rotating Beacon SLD1

Explosionproof Signalling Hooter mHP12 for Zone 1+2

XB12 21 Joule Xenon Beacons Exd, Weatherproof

YHQ50 explosion-proof ball machine

Sonix Ex Bec 2 Ex 5j Xenon Flashing Beacon

XF40-Di Explosion Protected Dual Imaging Fixed Camera Station

PH1 Exd, Weatherproof

XP40-P Explosion Protected Analogue PTZ Camera Station

XP40-Ti Explosion Protected Thermal Imaging PTZ Camera Stations

DB15 Up to 117dB(A) Harsh Industrial & Marine Environments

SF40-Di Dual Imaging Fixed Camera Station

DB5 Up to 103 dB(A)-Intrinsically Safe (Exia), Weatherproof

YHQC-225H high-definition bolt

dEV 20 Ex de sounder-up to 115 dB(A)

TTC-310 thermostat

TTC-315A4 Thermostat

TTC-315R4 Thermostat

TTC-315FF Thermostat

TTC-S310 Dry Type Transformer Temperature Controller

Field Fault Repair Cases

Below are 3 real-world, short fault repair cases to help maintenance teams quickly diagnose and resolve common issues with the listed spares, minimizing downtime and ensuring the safe operation of critical systems:

Case 1: YHT300A Camera Cover Damage Causing Camera Malfunction in Chemical Plant

Problem: A YHW220-IR explosion-proof camera in a Zone 1 chemical plant failed to capture clear footage, and moisture was found inside the camera lens. Diagnosis: The YHT300A explosion-proof all-weather camera protective cover had a cracked seal, allowing moisture and dust to enter the camera housing. Repair: Replaced the YHT300A cover with a new unit, cleaned the YHW220-IR camera lens and housing, and tested the camera’s infrared functionality. Result: The camera resumed normal operation, capturing clear footage day and night, and moisture ingress was eliminated.Preventive Measure: Added monthly inspections of YHT300A covers to check for seal damage and replace worn seals proactively.

Case 2: TTC-S310 Temperature Controller Malfunction Causing Transformer Overheating Alarm

Problem: A dry-type transformer in a power station triggered an over-temperature alarm, and cooling fans failed to start, risking transformer damage. Diagnosis: The TTC-S310 Dry Type Transformer Temperature Controller’s PT100 sensor was faulty, providing incorrect temperature readings (false high temperature), and the fan control relay failed. Repair: Replaced the PT100 sensor and the controller’s internal relay, calibrated the TTC-S310 to ensure accuracy (±1℃), and tested the fan control functionality. Verified the "black box" function to ensure it recorded temperature data correctly. Result: The over-temperature alarm cleared, cooling fans started normally at the preset threshold (100℃), and the transformer returned to normal operating temperature (70℃). Preventive Measure: Added quarterly sensor checks and annual calibration to the maintenance schedule, and enabled the fan定时检测 function (set to 100 hours) to prevent fan rusting.

Case 3: ExResistTel IP2 Telephone Failure in Oil Refinery Hazardous Area

Problem: An Explosionproof VoIP Telephone ExResistTel IP2 in a Zone 1+21 oil refinery failed to make or receive calls, hindering emergency communication. Diagnosis: The telephone’s network cable was damaged due to corrosion, and the keypad had dust buildup preventing key presses. Repair: Replaced the network cable with an explosion-proof rated cable, cleaned the telephone keypad and housing, and tested VoIP call functionality (including noise cancellation). Result: The telephone resumed normal communication, with clear audio even in high-noise environments (80dB background noise). Preventive Measure: Added quarterly inspections of ExResistTel IP2 telephones to check for cable damage and keypad functionality, and cleaned the housing regularly to prevent dust buildup.

FAQ (Frequently Asked Questions)

Procurement Guide & Technical Support

All spare parts listed—including the YHT300A explosion-proof all-weather camera protective cover, Explosionproof VoIP Telephone ExResistTel IP2, TTC-S310 Dry Type Transformer Temperature Controller, KJ2028E explosion-proof control box, and XB12 21 Joule Xenon Beacon—are available for procurement. We provide full technical specifications, ATEX/IEC Ex/JB/T 7631-2016/ISO certification documents, and compatibility verification to ensure each part meets your exact security, alarm, or temperature control system requirements. Our team of industry experts can assist with part selection (matching cameras to covers, controllers to transformers), installation guidance, and troubleshooting to ensure seamless integration and optimal performance. For procurement inquiries, contact our team to discuss your specific needs and obtain a detailed quote. We prioritize quality, compatibility, and reliability, delivering premium spares that keep your critical systems running efficiently, safely, and without unnecessary downtime—whether for hazardous industrial sites, power stations, marine environments, or commercial facilities.

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Emeil: [email protected]   whatsapp: +86 15275658619

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