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3UG3501 数据表(PDF) 48 Page - List of Unclassifed Manufacturers |
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3UG3501 数据表(HTML) 48 Page - List of Unclassifed Manufacturers |
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48 / 114 page  3RP, 7PV Timing Relays General data 7/48 Siemens LV 1 T · 2006 3RP15 function table Possibilities of operation of the 3RP15 60-1S.30 timing relay Timing relay energized Contact closed Contact open tY = star time 1 to 20 s tIdling = idling time (overtravel time) 30 to 600 s Operation 1 Operation 1: Start contact B./A2 is opened when supply voltage A./A2 is applied. The supply voltage is applied to A./A2 and there is no control signal on B./A2. This starts the * D timing. The idling time (overtravel time) is started by applying a control signal to B./A2. When the set time IIdling (30 to 600 s) has elapsed, the output relays (17/16 and 17/28) are reset. If the control signal on B./A2 is switched off (minimum OFF period 270 ms), a new timing is started. Comments: Observe response time (dead time) of 400 ms on energizing supply voltage until contacts 17/18 and 17/16 close. Operation 2: Start contact B./A2 is closed when supply voltage A./A2 is applied. If the control signal B./A2 is already present when the supply voltage A./A2 is applied, no timing is started. The timing is only started when the control signal B./A2 is switched off. Operation 3: Start contact B./A2 closes while star time is running. If the control signal B./A2 is applied again during the star time, the idling time starts and the timing is terminated normally. Operation 4: Start contact B./A2 opens while delta time is running and is applied again. If the control signal on B./A2 is applied and switched off again during the delta time, although the idling time has not yet elapsed, the idling time (overtravel time) is reset to zero. If the control signal is re-applied to B./A2, the idling time is restarted. Application example based on standard operation (operation 1) For example, use of 3RP15 60 for compressor control Frequent starting of compressors strains the network, the machine, and the increased costs for the operator. The new timing relay prevents frequent starting at times when there is high demand for compressed air. A special control circuit prevents the compressor from being switched off immediately when the required air pressure in the tank has been reached. Instead, the valve in the intake tube is closed and the compressor runs in "Idling" mode for a specific time which can be set from 30 to 600 s. If the pressure falls within this time, the motor does not have to be restarted again, but can return to nominal load operation from no-load operation. If the pressure does not fall within this idling time, the motor is switched off. the pressure switch controls the timing via B./A2. The supply voltage is applied to A./A2 and the start contact B./A2 is open, i.e. there is no control signal on B./A2 when the supply voltage is applied. The pressure switch signals "too little pressure in system" and starts the timing by way of terminal B./A2. The compressor is started, enters * D operation, and fills the pressure tank. When the pressure switch signals "sufficient pressure", the control signal B./A2 is applied, the idling time (overtravel time) is started, and the compressor enters no-load operation for the set period of time between 30 to 600 s. The compressor is then switched off. The compressor is only restarted if the pressure switch responds again (low pressure). Operation 2 Operation 3 Operation 4 The following applies to all operations: The pressure switch controls the timing via B./A2. A./A2 B./A2 17/18 Y 17/28 17/16 Y Idling t t 50 ms Y t 50 ms Idling t 300 ms A./A2 B./A2 17/18 Y 17/28 17/16 Y NSB00892 50 ms t Idling t A./A2 B./A2 17/18 Y 17/28 17/16 Y NSB00893 50 ms t Idling t A./A2 B./A2 17/18 Y 17/28 17/16 Y Idling t < t Idling t < Idling t 50 ms |
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