3UG4513-1BR20 SIEMENS, 3UG4513-1BR20 Datasheet - Page 23

• Manufacturer Part Number: 3UG4513-1BR20
• Description: SSR, DIN RAIL, 690VAC, 690VAC, 5A
• Manufacturer: SIEMENS

Specifications of 3UG4513-1BR20

• Control Voltage Range: 160V To 690V
• Operating Voltage Range: 200Vrms To 690Vrms
• Load Current: 5A
• Control Voltage Type: AC
• Relay Terminals: Screw
• Length/height, External: 82mm
• External Width: 22.5mm
• Load Voltage Max: 400V
• Load Current Rms Max: 5A
• Rohs Compliant: Yes
• External Depth: 86mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Overview
Function
The principle of operation is based on measuring the electrical
resistance of the liquid between two immersion sensors and a
reference terminal. If the measured value is lower than the
sensitivity set at the front, the output relay changes its switching
state. In order to exclude electrolytic phenomena in the liquid,
the sensors are supplied with alternating current.
Two-level control: the output relay changes its switching state as
soon as the liquid level reaches the maximum sensor, while the
minimum sensor is submerged. The relay returns to its original
switching state as soon as the minimum sensor no longer has
contact with the liquid.
For safe resetting, the supply voltage must be interrupted for at
least 0.5 s (T3).
The delay times T1 and T2 of the output relay have not been
included in the diagram in order to enhance clarity.
3UG Monitoring Relays for Electrical and Additional Measurements
© Siemens AG 2007
The 3UG35 01 level monitoring relay is used together with the
2- or 3-pole sensors to monitor the levels of conductive liquids.
Note:
It is also possible to connect other resistance sensors to the Min
and Max terminals in the range 5 ... 100 kW, e.g. photoresistors,
temperature sensors, encoders based on resistance etc.
The monitoring relay can therefore also be used for other
applications apart from monitoring the levels of liquids.
1
A1/A2
1
2
3
4
5
) Determined by the arrangement
of the probes in the monitored liquid.
5
1
2
4
Maximum level )
Minimum level )
Monitored level
Output relay
Function OVER
Output relay
Function UNDER
Monitoring Relays
1
1
Siemens LV 1 T · 2007
T3
NSB0_00961
Level monitoring
3
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