RM4TG20 TELEMECANIQUE, RM4TG20 Datasheet - Page 4

• 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

Current and voltage measurement relays :
pages 3/32 to 3/43
3-phase supply control relays :
pages 3/44 to 3/49
Single-phase supply control relays :
pages 3/50 to 3/53
Liquid level control relays :
pages 3/54 to 3/57
Output circuit characteristics
Mechanical durability
Current limit Ith
Rated operational limits at 70 C
Conforming to IEC 60947-5-1/1991
and VDE 0660
Minimum switching capacity
Switching voltage
Contact material
a.c. load
Curve 1
Electrical durability of the contacts on a resistive
load in millions of operating cycles
Example:
An LC1-F185 contactor supplied with 115 V/50 Hz for a consumption of 55 VA or a current
consumption equal to 0.1 A and cos
For 0.1 A, curve 1 indicates durability of approximately 1.5 million operating cycles.
As the load is inductive, it is necessary to apply a reduction coefficient k to this number of
cycles, as indicated by curve 2.
For cos
The electrical durability therefore becomes:
1.5 10
0,01
0,1
10
1
0
6
operating cycles x 0.6 = 900 000 operating cycles
1
= 0.3 : k = 0.6
2
3
4
Current broken in A
5
6
7
= 0.3
Zelio Control - measurement and control relays
General characteristics
In millions of operating cycles
AC-15
DC-13
Rated
Max
8
Curve 2
Reduction factor k for inductive loads
(applies to values taken from the
durability curve opposite)
0,9
0,8
0,7
0,6
0,5
0,4
0,3
1
1
0,8
0,6 0,5
Power factor on breaking (cos )
(continued)
0,4
A
A
V
V
A
0,3
30
8
24 V
3
2
12 V/10 mA
c 250
c 440
Nickel Silver 90/10
0,2
d.c. load
Load limit curve
1
2
3
+
–
L/R = 20 ms
L/R with load protection diode
Resistive load
300
200
100
RM4
115 V
3
0.3
50
40
30
20
10
K
0,1
0,2
1
2
0,5
3
250 V
3
0.1
1
Te
2
5
Current in A
10
20
3/31
3