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
| 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 |
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.
*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
Downloadable
Datasheet
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