RM4TG20 TELEMECANIQUE, RM4TG20 Datasheet - Page 19

• 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

3
Characteristics :
page 3/47
References :
page 3/48
Dimensions, schemes :
page 3/49
3/46
Te
Relay
Zelio Control - measurement and control relays
3-phase supply control relays RM4-T
Presentation
Operating principle
i Undervoltage detection only (RM4-TU)
Function diagram
t: fixed time delay = 550 ms
i Detection of phase asymmetry (RM4-TA)
Function diagram
L3 L2
t: time delay
Example: asymmetry set at 10 %, mains supply voltage 400 V
- relay de-energisation threshold: 400 - 10 % = 360 V.
- relay re-energisation threshold: 400 V – ––––
1.05 x Setting < U
L1
In normal operation, the output relay is energised and the yellow LED is illuminated.
If the average of the 3 voltages between phases is less than the undervoltage threshold setting, the relay is de-
energised after 550 ms and the red LED “< U” illuminates.
In normal operation, the output relay is energised and the yellow and green LEDs are illuminated.
In the event of an asymmetry fault, after a time delay set between 0.1 s and 10 s (on RM4-TA3 only), the output relay
is de-energised, the yellow LED goes out and red LED “A” illuminates (RM4-TA3i only).
The relay re-energises when the asymmetry value measured is less than half of the asymmetry value setting
(hysteresis).
L1 L3
L2
Setting < U
15-18
15-16
25-28
25-26
L2 L1
15/18 25/28
15/16 25/26
U
L3
L1 L2 L3
Asymmetry >
set threshold
(continued)
(continued)
t
t
10 %
2
= 380 V.
< t
0 volt
t
Asymmetry >
set threshold