Gestra TRS5-50
Gestra
Ürün No: TRS5-50
Üretici: Gestra
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Datasheets for Gestra TRS5-50
Description for Gestra TRS5-50
Description The temperature switch TRS 5-50 is used in conjunction with temperature sensor TRG 5-6.. as safety temperature limiter or monitor, for instance in steam boilers and (pressurised) hotwater plants. When the max. admissible temperature in the superheater or the inlet line is reached, the safety temperature limiter or monitor switches the heating off. The temperature switch TRS 5-52 is designed for use in conjunction with temperature sensors TRG 5-63, TRG 5-64, TRG 5-65, TRG 5-66, TRG 5-67 and TRG 5-68. Function A platinum resistance thermometer Pt 100 to EN 60751 is used as temperature sensor for the temperature switch TRS 5-50. A three-wire configuration is used for the electrical connection. The temperature switch processes the temperature-dependent changes in resistance of the temperature sensor and, during normal operation, the seven-segment LED display shows the adjusted switch-off temperature TMAX (°C) and the actual value T (°C). The switchpoint for MAX temperature can be variably adjusted within the measuring range. Once the MAX temperature is reached both output contacts of the temperature switch open the safety circuit and the seven-segment LED display for TMAX is flashing. In addition the relay contact for external signalling equipment is closed. If the system is configured as safety temperature monitor, the temperature switch does not automatically interlock the deactivation of the heating. As soon as the temperature has fallen below the non-adjustable hysteresis, the safety circuit will be closed again. However, if the system is configured as safety temperature limiter, the temperature switch automatically interlocks the deactivation of the heating. Note that once the temperature has fallen below the non-adjusted hysteresis, the equipment must be reset manually or externally in order to close the safety circuit. Any error or malfunction that occurs in the temperature sensor, the electrical connection or the temperature switch is indicated by the seven-segment LED display and the output contacts will be opened. An automatic self-testing routine monitors the safety functions in the temperature switch and the temperature sensor. In the event of a malfunction the safety circuit opens instantaneously and switches the heating off. Parameter settings can be changed, a MAX temperature alarm can be simulated and the equipment can be reset by operating the rotary button. For external temperature indication the equipment is optionally available with an actual-value output 4-20 mA.
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