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Temperature limiter for explosive gas atmospheres.
Type UJW
Applications:
Motors thermal protection, heat tracing, alarm and high temperature safety in explosive gas atmospheres.
Main features:
Classification:Ex mb IIC (Testing certificates: ATEX INERIS 15ATEX0018X and IECEx INE15.0022X).
Ambient temperature limits on enclosure : -40 to +150°C
Comply with the following standards:
- EN 60079-0: 2012/A11:2013
- IEC60079-0: 2011
- EN 60079-18: 2009
- IEC 60079-18: 2009
- EN 60079-31: 2014
- IEC 60079-31: 2013
Operating principle: bimetal disc crossed by the current, and whose shape change activates an electrical snap action contact.
Enclosure:Zamac, 31mm x 19mm x10mm. Ingress protection class IP65.
Mounting: by 2 holes dia.3mm
Set point: fixed factory set minimum 50°C maximum 150°C. (Calibration values are always zero current values).
Calibration tolerance: ± 5 ° C on the opening temperature (± 3 ° C on request)
Differential: fixed, not adjustable by the user. About 40°C at zero current.
Electrical rating: 9A 240VAC resistive, 3A, 240VAC inductive, 10,000 cycles. (13A resistive version is possible, consult us)
Current Sensitivity*: These devices are sensitive to the electrical intensity, and the cut-off temperature will be less than the nominal calibration temperature according to the table below:
Rating | 3A | 5A | 7A | 10A |
Offset | -2.5° C | -5°C | -10°C | -20°C |
Connection: by silicone insulated cable, 2 x 1 mm², O.D. 6.3mm. Withstands temperatures from -60 to + 180 ° C. The cable shall be protected,during installation, against shocks and risks of mechanical destruction. The cable must be fixed so that there is no risk of tearing it off the thermostat. The electrical connection must be made according to the specifications of the zone (EN 60079-0). In function of the ambient temperature on the cable, the intensity must be less than the values below:
Maximum ambient temperature on the cable:
Temperature | 120°C | 140°C | 170°C |
Intensity | 12A | 9A | 5.4A |
Cable length: Can be cut on demand. Standard lengths: 1m, 3m, 5m
Short circuit trigging*: If an overcurrent occurs in the circuit, the thermostat contact will switch off automatically. The table below gives the response time in seconds of the thermostat according to its set point calibration and overcurrent. Measurements made at an ambient temperature of 20°C.
Temperature calibration | Trigger time | |||||
15A | 20A | 25A | 30A | 35A | 40A | |
90 | 100s | 30s | 11s | 5s | 2.5s | 1s |
110 | 150s | 40s | 20s | 8s | 4s | 2.5s |
130 | 250s | 80s | 30s | 12s | 6.5s | 4s |
150 | 400s | 150s | 45s | 18s | 9s | 6s |
*Indicative values, they may vary depending on the installation characteristics. If these values are critical in the application, we recommend performing validation tests.
Main references
Cable length | Calibration temperature (±5°C) | |||
90°C | 110°C | 130°C | 140°C | |
1m | UWJZKP100905B00A | UWJZKP101105B00A | UWJZKP101305B00A | UWJZKP101405B00A |
3m | UWJZKP300905B00A | UWJZKP301105B00A | UWJZKP301305B00A | UWJZKP301405B00A |
6m | UWJZKP600905B00A | UWJZKP601105B00A | UWJZKP601305B00A | UWJZKP601405B00A |
Established in China since 2000, with French technology and investment, our company is proud to have more than 60 years experience in manufacturing electromechanical components and 30 years experience in manufacturing safety component for Spas, swimming pools and hot tubs. This experience, combined with high tech equipment and high tech raw materials let us develop the new components needed by rapid expansion of Asian and Chinese market.
In our new factory, on more than 8000 square meters production lines, we have two manufacturing divisions:
Division one is producing components:
Thermostats, energy regulators pressure switches, level switches, flow switches, fire detection fusible links, heating elements and ceramic connection blocks.
Division two is producing complete assemblies and sub assemblies on customer specifications:
Swimming pools heaters, heat pumps backup heaters, spas heaters, small water heaters, immersion heaters, aluminum foils heaters, baseboard and convection heaters sub assemblies
Our R&D team develops new products upon customer specification, taking care of international safety standard (UL, CE, etc.).
We produce our own stamping, bending, plastic injection, zinc alloy injection, and machining.
We are equipped with up to date automatic and CNC TIG welding and laser welding equipment and ultrasonic welding checking.
We have our own climatic room, corrosion testing loops, salt spray testing, and more than 30 specific equipments for products life testing.
Our income quality control laboratory is equipped to check raw material (plastics, metals) physical characteristics and dimensions.
Our finished product control laboratory has more than 200 machines to calibrate and check temperature, pressure, level and flow controls.
From the raw material to the finished product we control every production step. Meet your control equipment demand rapidly and safely is our consistent promises.
Basic Information
| Product/Service Sell): | Flow switches, level switch,pressure switch, thermostat,heating elements, back up heaters for heat pumps |
| Number of Employees: | 200 to 300 People |
Trade & Market
| Main Markets: | North America |
| Total Annual Sales Volume: | US$2.5 Million - US$5 Million |
| Export Percentage: | 60% |
Factory Information
| Factory Size (Sq.meters): | 10,000 square meters |
| Factory Location: | Datian Cunkou, Fuwan industrial zone,Gaoming of Foshan, Guangdong province,China. |
| Number of Production Lines: | 15 |
| Number of R&D Staff: | 5-10 |
| Number of QC Staff: | more than 15 People |
| Management Certification: | ISO9001/14001 |
| Contract Manufacturing: | Customized products on request (MOQ apply), OEM developments welcome. |
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