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General rules for installation:
Important note:These limiters are intended to control temperatures in gas or dust hazardous areas.

For gas hazardous areas, this equipment is approved as “Ex-mb” and is suitable for use in zone 1 and zone 2, gas group IIC (Hydrogen/Acetylene, the highest protection group), with a temperature classification T3 ;

For dust hazardous areas, this equipment is approved as “Ex-tb”, suitable for use in, zone 21 and zone 22, the dust group is IIIC (electric conductive dust, the highest protection group), maximum allowed equipment temperature 180°C. The thermostat electrical connections at the end of the wires must be made inside an EX-“e” enclosure.

Approvals: These thermostats are certified: ATEX: TÜV 22 ATEX 8890 X ; IECEx: TUR 22. 0055X ;

Housing: Aluminum,33 × 13 × 22mm

Temperature sensing element: Current sensitive miniature bimetal disc

Electrical connection: H05SS-F silicone insulated cable, 2 × 1mm² (≈ 2 × AWG16), 300V, withstanding -60+180°C (-76+356°F). Wire ends with crimped terminals.

Ground: By the enclosure body

Adjustment: These limiters are factory calibrated, with no adjustment possible by user. Calibration values are checked on it before encapsulation. They are checked with a pilot load at nearly 0 Amp.

Mounting: 2 holes dia 3.1mm 25mmx15mm distance

Response time: These limiters are not designed to respond quickly if the temperature rise rate is higher than 0.5°C per minute

Contacts: Snap action contact, SPNC, open by temperature rise

Electrical rating: 6A 240V resistive and 3A 240V inductive (10,000 cycles). Suitable for power control, remote control of relay coils or PLCs circuits

These devices use silver contacts or silver alloy contacts. Due to the possible oxidation of the contacts in time, we do not recommend the use of AC or DC low-voltage circuits (24V or less) if the switched intensity is less than 100mA, or the switched power less than 800mW.

Current derating: These devices are current sensitives and the real opening temperature must be decreased depending of the current in the circuit where they are used.

For example: A limiter calibrated at 100°C with cut a 90°C if the current is 7Amps

Short circuit trip time: If for any reason there is an overload in the circuit, the limiter will open automatically. The table hereunder provides the tripping in seconds, depending of the overload. Measurement made with a thermostat at 25°C (77°F) ambient temperature

Classification:
Gas:  II 2G Ex mb IIC T3 Gb
Dust:  II 2D Ex tb IIIC T180°C Db