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Summary of Contents for Kobold TWR
- Page 1 Operating Instructions Temperature Switch Model: TWR...
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Page 2: Table Of Contents
EU Declaration of Conformance Standard version ........14 UK Declaration of Conformity Standard version .......... 15 Manufactured and sold by: Kobold Messring GmbH Nordring 22-24 D-65719 Hofheim Tel.: +49(0)6192-2990 Fax: +49(0)6192-23398 E-Mail: info.de@kobold.com Internet: www.kobold.com page 2... -
Page 3: Note
3. Regulation Use TWR model devices are used to monitor the temperature of liquids. The temperature switches are delivered with a preset temperature switching value with N/O or N/C contacts. Only liquids to which the thermostat materials are resistant should be monitored. -
Page 4: Operating Principle
4. Operating Principle The switching element in the model TWR is a thermal time-delay switch. Two strips of metal with different coefficients of thermal expansion are rolled together in the switch. When temperature is applied the bimetal reed bends and thus opens/closes the contact. -
Page 5: Use In Hazardous Areas
6. Use in Hazardous Areas 6.1. General The temperature switches TWR-3 **** and TWR-4 **** can be used as follows (taking into account the notes and the approved electrical limit values): a) In zone 2 (Gas-Ex, EPL Gc) in explosion group IIA, IIB and IIC... -
Page 6: Warnings For Use In Hazardous Areas
A power reduction Pi according to 15c) must be complied with at higher ambient temperatures. k) The installer / operator must prepare a control drawing (proof of intrinsic safety) and attach the explosion protection document. page 6 TWR K10/0322... -
Page 7: Mechanical Connection
Installation: The TWR is installed in a G 3/4 fitting. Seal the connection threads with sealing tape or a flat gasket. Chose the installation position so that the sensor tip is always immersed in the liquid, thus optimising the heat exchange between medium and temperature switch. - Page 8 Contacts TWR-1... TWR-2... TWR-3... TWR-4... TWR-1/3... TWR-2/4..., N/O function The contact closes when the temperature rises and the switching value has been reached or exceeded. It opens again when the temperature falls below the limit value less the switching hysteresis.
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Page 9: Maintenance
(i.e., below ambient temperature) 9. Maintenance The TWR requires no maintenance if the measured medium is clean. Dirt deposits can cause inaccuracies or a malfunction. Depending on the degree of soiling of your medium, we recommend that the devices are checked at regular intervals. -
Page 10: Technical Information
24 V (TWR-...L) 230 V (TWR-...G) Switching-current: 0.1...4 A (TWR-1...0, TWR-2...0) 0.1...1 A (TWR-1...L, TWR-2...L) 0.1...1 A (TWR-1...G, TWR-2...G) max. 5...200 mA (TWR-3, TWR-4) Housing: brass or stainless steel 1.4301 Connection: G 3/4 male Nominal pressure: PN 64 Weight: 0.5 kg Ambient temperature: -30…125 °C... -
Page 11: Order Codes
12. Order Codes Order Details (Example Standard version: TWR-11030L Example ATEX version: TWR-31030 0) Switching-function Type Switching range Pilot lamp (with rising temperature) (only standard) brass st. st. ..030.. = 30 °C ..035.. = 35 °C ..0 = without ..040.. = 40 °C ..L = LED 24 VDC... -
Page 12: Dimensions
13. Dimensions page 12 TWR K10/0322... -
Page 13: Eu Declaration Of Conformance Atex Version
Name des Unterzeichners / Name of signatory Name des Unterzeichners / Name of signatory H. Peters, Geschäftsführer / CEO Manfred Wenzel, Prokurist / authorized signatory Unterzeichnet für und im Namen der / Signed for and on behalf of Kobold GmbH TWR K10/0322 page 13... -
Page 14: Eu Declaration Of Conformance Standard Version
15. EU Declaration of Conformance Standard version We, KOBOLD-Messring GmbH, Hofheim-Ts, Germany, declare under our sole responsibility that the product: Temperature Switch Model TWR-... to which this declaration relates is in conformity with the standards noted below: EN 61010-1:2011 Safety requirements for electrical equipment for measurement, control and... -
Page 15: Declaration Of Conformity Standard Version
ATEX not available in GB 16. UK Declaration of Conformity Standard version We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole responsibility that the product: Temperature Switch Model TWR-... to which this declaration relates is in conformity with the standards noted below:...
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