Explosion-proof heater RIZUR-TERM-ATR
Intended use and appication area
Explosion-proof cylinder heaters RIZUR-TERM-ATR manufactured by NPO RIZUR comply, depending on the design variant, with the requirements of GOST R MEK 60079-0-2011, GOST R MEK 60079-18-2012 as electric equipment with explosion protection “explosion-proof enclosure(d)” and “compound sealing(m)”.
Explosion-proof heaters RIZUR-TERM-ATR are used in both explosion hazardous and general industrial areas of inside and outside facilities for heating the following objects:
- shut-off valves,
- enclosures,
- control cabinets,
- equipment and instrumentation,
- telecommunication and distribution cabinets,
- different types of safety shields and boxes.
Unique construction and small size of the cylinder heaters RIZUR-TERM-ATR allow their use in places where the equipment is placed in such a way that leaves little space for the heater.
Dimensions of RIZUR-TERM-ATR
| Dimensions, L | Capacity, W | Temperature on the heater's surface*, С° |
| 200 | 100…400 | up to 130 |
| 300 | 200…500 | up to 130 |
| 400 | 300…600 | up to 130 |
| *the temperature is measured at ambient temperature of 20°С. | ||
RIZUR-TERM-ATR follows the shape of a tube stand with 57mm diameter, which allows for device mounting directly onto the heater using standard fastening elements — of the connecting clamp.
Design description
Structurally, the heater has a cylinder form that allows to place it in close distance to the equipment. RIZUR-TERM-ATR is made from aluminium alloy. Inside the radiator there’s a ceramic on the basis of semi-conductive ceramic heating elements (PTC-ceramics) that are perceptive to temperature changes.
Electrical resistance is in non-linear dependence with the heating temperature – when the temperature gets higher, the resistance of the ceramic heating element grows exponentially, restricts the flowing current, and stops the temperature rise. Due to the self-regulating quality of the ceramic heating elements, RIZUR-TERM-ATR on the base of PTC-ceramics does not require usage of stabilizing components or protective equipment to prevent surface overheating which ensures long and correct operating of the heater.
Example of the heater RIZUR-TERM-ATR being used in the enclosure with pressure sensor and digital thermoregulator RIZUR-DCS-2.
Advantages of the cylinder heaters RIZUR-TERM-ATR on the basis of PTC-ceramics:
- self-regulation,
- energy efficiency,
- high power-weight ratio,
- small size,
- reliability,
- absence of additional components that can lead to the heater’s malfunction (for example, built-in thermostats);
- long service life.
The square footage of the outer surface corresponds to the nominal heating capacity and provides protection against over-heating (exceeding the set temperature limits). Exact calculation during engineering stage and use of high-quality materials allows us to have extended warranty for these heaters.
| Application area | General industrial areas |
|
Explosion hazard zones V-1а and V-1g acc. to Electrical installation code (PUE), Ch. 7.3 |
|
| Explosion protection marking | General purpose industrial version |
| 1Ex d IIС T6... T3 Gb X | |
| 1Ex mb IIC T6... T2 Gb X | |
| Heating element capacity | 100 ... 600 W |
| Power supply voltage | 230 (±15%) V AC |
| Temperature on the heater's surface |
In accordance with the temperature rating: |
| T4 - up to +135 ºС | |
| T5 - up to +100 ºС | |
| T6 - up to +85 ºС | |
| -30 … +110°C, an increment of 1°С (with digital thermoregulators manufactured by OOO "NPO RIZUR") | |
|
+10...+20°C (with thermoregulators on the base of a bimetallic thermostat) |
|
| Temperature maintained inside | |
| -25 … +110°C, an increment of 1°С (with digital thermoregulators manufactured by OOO "NPO RIZUR") | |
|
IP67 acc. to GOST 14254-96 |
|
| Ingress protection | |
|
Insulation strength |
min. 1500 V |
|
Insulation resistance |
min. 20 МОhм |
|
Protection against electrical shock |
class 1 acc. to GOST 12.2.007.0 |
| Warranty period | 36 months |
|
Average operation time |
over 15 years |
