BSTW Safety Temperature Monitor, BTB/BSTB Safety Temperature Limiter16 A fail-safe

27-6A.1-..../....

Funktsioonid

  • 16 A switching capacity
  • Pre-set limit point for BSTB
  • Suitable for use in Zone 1 + Zone 2 areas
  • Temperature setting directly in Zone 1, Zone 21 and 22 areas possible
  • Resettable lockout on the device
  • Direct heating circuit connection via sheathed cable/cold lead
  • Temperature ranges from
    -20

Sertifikaadid

German English PTB 03 ATEX 1180
English DNV E-10452
English Chinese NEPSI GYJ11.1605
Russian GOST R POCC DE.ME92.B02734
Ukrainian No. 903
Byelorussian GOSPROMNADZOR 11-02-0015-2012

Ex kaitse liik

Ex II 2G Ex ed IIC T6, T5
Ex II 2D tD A21 IP65 T 80 °C, T 95 °C

Ümbritseva keskkonna temperatuur

-20 °C standard
-40 °C/-55 °C on request
Max. sensor temperature: up to +345 °C
see datasheet

Kirjeldus

The 16 A Ex temperature monitor BSTW/temperature limiter BTB/BSTB are change-over controllers housed in an Ex e certified polyester enclosure.

Heaters, fans, motors and other equipment are energised and de-energised by means of this thermostat when specific temperature ranges are exceeded. These devices can also be used to control the temperature in air or on various surfaces. The fail-safe temperature limiter BTB and the fail-safe temperature limiter BSTB are produced with restart lockout, resetting (reopening) is only possible at the device.

Function

Any change in temperature at the sensor bulb causes a change in the volume of fluid in the measuring system, which in turn results in a movement of the diaphragm membrane. This membrane is connected to a mechanical device that activates a microswitch. If the temperature at the sensor bulb exceeds the pre-set value, terminals 1 and 4 are opened.

The BTB and BSTB devices ?lock-out? permanently if the set temperature is exceeded. After a temperature decrease of about 9 % below the set value, both BTB and BSTB can be re-set manually. If there is a rupture or break in the sensor tube (leakage), then the switch remains permanently open (fail-safe). If the temperature falls below the minimum setting, the autocontrol opens the circuit but closes again on temperature rise.

Tehnilised andmed (väljavõte)

(Täpsema info jaoks klikka siia)
Protection classIP 65 (EN 60529)
DimensionsSingle unit 122 x 120 x 90 mm
Double unit 220 x 120 x 90 mm
Capillary tube: 1000 mm length
OD sensor line 1.5 mm
min. bend radius 5 mm
sensor bulb diameter 6 mm
Storage temperature-50 ?C to +65 ?C
WeightSingle unit 1.1 kg
Double unit 2.0 kg
Temperature rangeBSTW: -20 ?C to +300 ?C (mechanical)
BTB: 0 ?C to +300 ?C (mechanical)
Voltagemax. AC 250 V, 50/60 Hz
CurrentSwitching capacity: 16 A NC / 10 A NO
Connection4 Terminals with 2.5 mm? + 1 PE
Cable glands 2 x M25

Dokumentatsioon

Data Sheet - BSTW Safety Temperature Monitor, BTB/BSTB Safety Temperature Limiter German English French Russian 
Declaration of Conformity 21-6A01-7C0001 German English French