RE8TA31BU TELEMECANIQUE, RE8TA31BU Datasheet - Page 6

• Manufacturer Part Number: RE8TA31BU
• Description: TIMER, ON-DELAY, 3-30S
• Manufacturer: TELEMECANIQUE

Specifications of RE8TA31BU

• Contact Configuration: SPCO
• Nom Input Voltage: 240VAC
• Delay Time Range: 3s To 30s
• Relay Mounting: DIN Rail
• Coil Voltage Vac Nom: 240V
• Contact Current Ac Max: 8A
• Contact Current Dc Max: 8A

References :
pages 2/38 and 2/40
Dimensions :
page 2/42
Schemes, setting-up :
pages 2/39, 2/41 and 2/43
Time delay characteristics
Setting accuracy
Repeat accuracy
Influence of voltage
Influence of temperature
Immunity to
micro-breaks
Minimum control pulse
Reset time
Output circuit characteristics
Maximum switching voltage
Mechanical durability
Current limit Ith
Rated operational limits at 70 C
Conforming to IEC 60947-5-1/1991
and VDE 0660
Minimum switching capacity
Contact material
Remote control input characteristics
Signal delivered by
control input Y1
this input and the power supply
a.c. load
Curve 1
Electrical durability of contacts on resistive
load in millions of operating cycles
A
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 a 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
RE8-RBiiBUTQ
1
No galvanic insulation between
0
6
operating cycles x 0.6 = 900 000 operating cycles
1
= 0.3: k = 0.6
2
3
4
A
Current broken in A
5
6
7
= 0.3
Zelio Time - timing relays
Relay output, width 22.5 mm, optimum
General characteristics
As % of the full scale value
In the voltage range, 0.9…1.1 Un
In millions of operating cycles
AC-15
DC-13
No-load voltage
Switching current
Maximum distance
Compatibility
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
ms
ms
A
A
mA
m
ms
V
A
0,3
< 1 %
< 2.5 %
< 0.2 %/ C
3
26 (except RE8-YG: 60)
50
z 250
20
8
24 V
3
2
12 V/10 mA
Nickel Silver 90/10
Supply voltage
< 10
50
a 2-wire sensors with leakage current < 1 mA
20 %
0,2
A
1
2
3
d.c. load
Load limit curve
+
–
RE8-RBiiBUTQ
L/R = 20 ms
L/R with load protection diode
Resistive load
300
200
100
RE8
115 V
3
0.2
50
40
30
20
10
K
0,1
0,2
1
2
0,5
3
250 V
3
0.1
1
Te
2
A
5
Current in A
10
20
2/37
2