BSTW II Safety temperature monitor and BTB II/BSTB II limiter25 A, fail-safe

Sertifikaadid

  EPS 11 ATEX 1356 X

Ex kaitse liik

 II 2 G Ex de IIC T6, T5, T4, T3

Ümbritseva keskkonna temperatuur

Min.: -55 °C (Standard)
Max.: see data sheet

Kirjeldus

BSTW II 25-A Ex temperature monitors and BTB II/BSTB II temperature limiters are two-state controllers in Ex e-certified polyester enclosures. In addition to the use of conventional wiring by means of a sheathed cable, the BSTW II and BTB II/BSTW II are suitable and approved for the direct connection of self-limiting BARTEC heating systems in the enclosure. As a result, a verification of thermal safety and a further acceptance test by a capable person is no longer necessary. The benefit for the customer is obvious. The direct connection of self-limiting heating tapes does away with the need for junction boxes and considerably reduces the extent of wiring required. BSTW II and BTB II/BSTB II can monitor the ambient temperature but also the different surface temperatures. In conformance to EN 60079-30-1, the 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 in the device.

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.

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.