RM4TG20 TELEMECANIQUE, RM4TG20 Datasheet - Page 16

• Manufacturer Part Number: RM4TG20
• Description: PHASE MONITORING RELAY, DPDT-2CO, 484VAC
• Manufacturer: TELEMECANIQUE
• Series: RM4r

Specifications of RM4TG20

• Contact Configuration: DPCO
• Phase Type: 3 Phase
• Supply Voltage Max: 484VAC
• Switching Voltage Max: 440VAC
• Relay Mounting: DIN Rail
• Length/height, External: 78mm
• External Width: 22.5mm
• External Depth: 80mm
• Carry Current: 8A

Presentation:
pages 3/38 and 3/39
Characteristics:
page 3/40
References:
page 3/41
Dimensions, schemes:
page 3/42
Example of undervoltage to be measured
Undervoltage threshold to be measured: 12 V a.
Time delay of the output relay: 20 s.
Reset voltage threshold: 13.2 V.
Supply voltage: 230 V c 60 Hz.
Adjustments:
i Adjustment of function and timing range, switch 4:
i Fine adjustment of time delay:
i Set the voltage threshold setting potentiometer
i Set the hysteresis
Extension of the measuring range
Supply by the measured voltage
RM4-UA33
R
U
- determine the timing range, immediately greater than the time required, in this example 30 s.
- determine whether overvoltage or undervoltage detection is required, in this example undervoltage.
- position switch
Depending on the max. range setting displayed at
In this example, the required time = 20 s therefore:
In this example: wiring B2-C, max. value of measuring range = 50 V, therefore:
Setting
Setting
t x 100
4
RM4-UA
Ri
1
2
=
B2/B3
1
2
3
4
=
=
B3
20 x 100
C
C
12 x 100
30
13.2 - 12
50
4
12
2
according to the above 2 criteria, in this example, switch
U > 500 V
Rs
= 66 %
as a % of the threshold value; in this example:
= 24 %
= 10 %
Zelio Control - measurement and control relays
Voltage measurement relays RM4-UA
Setting-up
i Product selected RM4-UA32M
d.c. or a.c. supply
Simply connect an additional resistor (Rs) in series with the measuring input B3 or C.
If the value of Rs is in the region of:
Rs = Ri (
The tripping threshold of the relay will be towards the maximum graduation on the threshold setting potentiometer.
In general, the power consumed by the resistor does not exceed 0.5 W.
For a.c. voltages, it is also possible to use a voltage transformer.
For monitoring mains and power supplies, the RM4-UA can be supplied by the voltage to be controlled, provided that:
- the measurement threshold is within the operating range of the product's power supply (0.85…1.1 Uc).
- variations of the voltage to be measured are compatible with the supply and measurement voltage ranges.
Connection of voltage to be measured B2-C (5 to 50 V)
Set the time delay potentiometer
Set the voltage threshold setting potentiometer
Set the hysteresis
Um
1
U
as a percentage of the maximum value of the measuring range selected when wiring.
4
- 1) where: Ri
(in this example: 30 s) use potentiometer
2
to 10.
Um Maximum value of threshold setting range.
U
Internal resistance of input B3-C.
Voltage threshold to be measured.
3
to 66.
4
on < 30.
1
to 24.
3
to set the required time delay as a % of value 4.
Te
3/43
3