BSTW II Safety Temperature Monitor And BTB II BSTB II Limiter 25 A Fail-Safe

Ex Proof Heat Tracing Equipment - BSTW II Safety Temperature Monitor And BTB II BSTB II Limiter 25 A Fail-Safe

BSTW II temperature monitors and BTB II/BSTB II temperature limiters are ON/OFF thermostats in Ex e certified polyester enclosures.

BSTW II Safety Temperature Monitor And BTB II BSTB II Limiter 25 A Fail-Safe

BSTW II temperature monitors and BTB II/BSTB II temperature limiters are ON/OFF thermostats in Ex e certified polyester enclosures. In addition to the use of conventional power cables, BSTW II and BTB II/BSTW II are approved for the direct connection of self-limiting BARTEC heating circuits in the enclosure terminals. A verification of thermal safety and a further approval by any third party authority is not necessary. The benefit to the customer is obvious. Any directly connected self-limiting heating circuit considerably reduces the number of junction boxes and installation cost. BSTW II and BTB II/BSTB II monitor ambient temperatures as well as different surface temperatures. In accordance with EN 60079-30-1, BTB II and BSTB II fail-safe temperature limiters are designed to switch off and remain switched off when the preset limit temperature is reached. The restart lockout requires manual resetting directly at the device.

Application Areas:

• Industrial furnaces
• Heating systems
• Plastic processing machines
• Food processing equipment
• Chemical processes
• Laboratory equipment
• Power plants
• HVAC systems
• Extruder Heating
• Hot press applications.

FUNCTION

Any change in temperature in the sensor causes a change in the volume in the liquid-filled measuring system, which in turn results in a movement of the diaphragm membrane, which is connected to a transmission mechanism, and this opens a microswitch. If the sensor temperature exceeds the set value, the contacts 1 and 2 remain continuously open. The contacts in the BTB II/BSTB II remain continuously open until there is a manual intervention.

FEATURES

• Direct connection of self-limiting heating tapes by means of BARTEC’s cold-applied technology reduces wiring and materials
• Switching voltage up to 400 V and 2 M20 x 1.5 boreholes as standard for an enhanced operation of EKL heating circuits
• Safety cut-out temperature -45 °C or -55 °C for reliable operation, even in very cold conditions
• Minimum operating temperature -55 °C for all standard variants for use all over the world without restrictions
• Wide regulating range from -20 °C to +500 °C, depending on the switch insert

BSTW II

Fail-safe safety temperature monitor.

• Falling calibration to maintain the temperature during the process
• Turns on and off automatically whenever the temperature exceeds or drops below the setpoint value

BTB II

Fail-safe temperature limiter.

• Rising calibration to limit temperature during the process
• Switches off and remains switched off once the limit temperatures are reached

BSTB II

Fail-safe safety temperature limiter.

• The BSTB II functions in the same manner as the BTB II temperature limiter, whereby the setting range is limited here to 0 °C to 130 °C or 130 °C to 190 °C based on the temperature classes T3 and T4.