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DUAL FREQUENCY (50/60HZ) PERCENTAGE OF RATED CURRENT VS TRIP TIME IN SECONDS AT +25°C
Delay
71
72
73
100%
No Trip
No Trip
No Trip
135%
.4 to 14
7 to 130
50 to 700
150%
.2 to 7
3 to 60
30 to 400
200%
.1 to 3
1.3 to 20
10 to 150
400%
.027 to 1
.085 to 3
.8 to 20
600%
.015 to .3
.02 to 2
.14 to 4
800%
.01 to .15
.015 to .8
.025 to 1
1000%
.008 to .1
.01 to .26
.01 to .26
Notes: All trip curves and trip currents are specified with the protector mounted in the normal vertical position at ambient temperature of +25° C. Protectors do not
carry current prio r to application of overload.
INRUSH PULSE TOLERANCE
Inrush Pulse Tolerance
It can be seen that the 64, 65 and 66 delays have a high inrush
capability and for most applications an inertia wheel would not
be required. Pulse tolerance is defined as a single pulse of half
sine wave peak current amplitude of 8 milliseconds duration that
will not trip the circuit breaker.
DELAY CURVES (TYP)
50/60Hz Delay Curves (typ)
A choice of delays is offered for DC, 50/60Hz, and 400 Hz
applications. Delays 40, 50, 60, 49, 59 and 69 provide fast-acting,
instantaneous trip and are often used to protect sensitive
electronic equipment (not recommended where known inrush
exists). Delays 41, 51, 61 and 71 have a short delay for general
purpose applications. Delays 42, 52 and 62 are long enough to
start certain types of motors and most transformer and capacitor
loads. Delays 43, 53 and 63 are long delays for special motor
applications at 400Hz DC and 50/60Hz.
10000
Delay Pulse Tolerance
61, 62 10 times rated current (approx)
61F, 62F 20 times rated current (approx)
64, 65, 66 20 times rated current (approx)
64F, 65F, 66F 35 times rated current (approx)
Note: These limits do not apply to dual coil and tapped coil units
10000
1000
100
10
1
.1
.01
DELAY 60
1000
100
10
1
.1
.01
DELAY 61
.001
0
100 150 200
125
300 400 500 600 700
PERCENT OF RATED CURRENT
800
900
1000
.001
0
100 150 200
125
300 400 500 600 700
PERCENT OF RATED CURRENT
800
900
1000
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