3UG4633-1AL30 SIEMENS, 3UG4633-1AL30 Datasheet - Page 19

• Manufacturer Part Number: 3UG4633-1AL30
• Description: RELAY, DIGITAL MONITORING, VOLTAGE
• Manufacturer: SIEMENS
• Series: 3UGr

Specifications of 3UG4633-1AL30

• Power Consumption: 2W
• Supply Voltage Max: 275V
• Relay Mounting: DIN Rail
• Control Voltage Type: AC / DC
• Contact Termination: Screw
• External Depth: 86mm
• External Length / Height: 110mm
• External Width: 22.5mm
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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■
Overview
Function
The monitoring relay measures the insulation resistance
between the ungrounded AC supply and an associated
protective conductor.
A superposed DC measuring voltage is used to perform the
measurement.
The monitoring relay is divided into two ranges for an insulation
resistance range from 1 ... 100 kW. A range switch on the front
can be used to switch over between a 1 ... 11 kW range and a
10 ... 110 kW range. Within the selected range, the monitoring
relay can be steplessly adapted to the respective insulation
conditions.
If the insulation resistance undershoots the set response value,
the output relay is excited and the red LED (fault indication) is lit.
If the insulation resistance exceeds 1.6 times (corresponding to
60 % hysteresis) the set response value, the output relay will
return to the rest position.
Test functions
The "Test" button on the front can be used to simulate a ground
fault. If the "Test" button is pressed for at least 300 ms, the output
relay is energized and the fault LED lights up. An external test
button can be connected to terminal Y1. The function is
activated by closing (> 300 ms).
Fault storage and RESET
If terminals Y1 and Y2 are jumpered, the monitoring relay is set
to fault storage mode. If the set insulation resistance is under-
shot, the output relay is excited and remains tripped even after
the insulation resistance rises above 1.6 times the set value
again. Fault storage can be reset by briefly pressing the RESET
button, briefly jumpering (< 300 ms) the Y1 and PE/ground
terminals or by switching off and on the supply voltage.
3UG Monitoring Relays for Electrical and Additional Measurements
© Siemens AG 2007
Relay for monitoring the insulation resistance between the
ungrounded single or three-phase AC supply and a protective
conductor
• Measuring principle with superimposed DC voltage
• Two selectable measuring ranges of 1 ... 110 kW
• Stepless setting within the measuring range
• Selectable:
• Test function with test button and terminal connections on the
• Switching output: 1 CO contact
• Insulation fault indication with a red LED
• Supply voltage indication with a green LED
• Electro-magnetically compatible according to EN 50081 and
Note:
The monitoring relay is designed for AC voltage systems.
Series-connected rectifiers must be galvanically isolated from
the measuring relay.
- Auto reset function with fixed hysteresis or
- Storage of the tripping operation
front
EN 61000-6-2.
t
Test
1
2
3
4
5
1
2
3
4
5
= > approx. 300 ms
= Supply voltage
= Remote connection-Save-Reset
= Button on the front Test/Reset
= Insulation resistance R of the network
= Normally open contact
A1/A2
A1/B2
Y1/Y2
Y1/PE
11/14
11/12
A1-B2/A1-A2 for AC 115V/230V
A1-A2 for AC/DC 24 … 240V
1,6 x R
R
R
value
value
Monitoring Relays
for ungrounded AC networks
Siemens LV 1 T · 2007
t
Insulation monitoring
Test
NSB0_01393a
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