RE8TA21BU SQUARE D, RE8TA21BU Datasheet - Page 6

• Manufacturer Part Number: RE8TA21BU
• Description: TIMER 300V 5AMP RE8 + OPTIONS
• Manufacturer: SQUARE D

Product data sheet
Performance Curves
Performance Curves
A.C. Load Curve 1
Electrical durability of contacts on resistive loading millions of operating cycles
X
Y
A.C. Load Curve 2
Reduction factor k for inductive loads (applies to values taken from durability curve 1).
X
Y
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
ϕ = 0.3. 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 ϕ = 0.3: k = 0.6 The electrical durability therefore
becomes:1.5 10
D. C. Load Limit Curve
X
Y
1
2
3
6
Current broken in A
Millions of operating cycles
Power factor on breaking (cos ϕ)
Reduction factor k
Current in A
Voltage in V
L/R = 20 ms
L/R with load protection diode
Resistive load
6
operating cycles x 0.6 = 900 000 operating cycles.
RE8TA21BU