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4 Technical Data
4.4
Thermal Overload Protection (ANSI 49)
Setting Ranges/
Resolutions
Trip Characteristic
Curve
Dropout Relations
Tolerances
Influencing
Variables Referring
to [k · I
]
N
412
K-Factor per IEC 60255-8
Time Constant
Extension K-Factor
when Machine Stopped
Thermal Alarm
(Θ ALARM)
Current Overload
Alarm (I ALARM)
Rated Temperature Rise
at Rated Sec. Current
Cooling Medium Temperature
for Scaling
Current Limiting
Emergency Time
Trip Characteristic Curve
≤
·
for (I/ k
I
)
I
N
Max therm.
Where:
Θ/Θ
trip
Θ/Θ
Alarm
I/I
Alarm
Referring to k · I
N
Thermal Trip and Alarm Times
Power Supply DC Voltage (U
0.8 ≤ U
≤ 1.15
/ U
PS
PS nominal
Temperature in Range
23 °F≤ ϑ
≤ 131 °F
amb
–5 °C ≤ ϑ
≤ 55 °C
amb
Frequency in Range
0.95 ≤ f/f
≤ 1.05
N
1
) For I
= 1 A, divide all limits and increments by 5.
N
0.10 to 4.00
τ
30 s to 32000 s
k
- Factor
1.0 to 10.0 relative to the time constant for
t
the machine running (Increments 0.1)
Θ
/Θ
70 % to 100 % of the trip temperature rise
Alarm
Trip
I
0.50 A to 20.00 A
Alarm
40 °C to 200 °C
104 °F to 392 °F
40 °C to 300 °C
104 °F to 572 °F
I
2.50 A to 40.00 A
Max therm.
10 s to 15000 s
See also Figure 4-4
τ
⋅
t
=
t
τ
I
I
pre
k
I
N
I
Max therm.
Drops out with Θ
Approx. 0.99
Approx. 0.95
2 % or 50 mA
IEC 60255–8
3 % or 1 s for I/(k ·I
3 % class per IEC 60255–8
) in Range
DC
1 %
0.3 % / 10 °F
0.5 % / 10 K
< 1 %
(Increments 0.01)
(Increments 1 s)
(Increments 1 %)
1
) (Increments 0.05 A)
(Increments 1 °C)
(Increments 1 °F)
(Increments 1 °C)
(Increments 1 °F)
1
) (Increments 0.05 A)
(Increments 1 s)
2
I
2
æ
ö
æ
ö
I
pre
------------ -
------------ -
–
è
ø
è
ø
⋅
⋅
k I
k I
N
N
ln
------------------------------------------------ -
2
æ
ö
I
------------ -
–
1
è
ø
⋅
k I
N
Trip time
Temperature rise time constant
Load current
Pre-load current
Setting factor per VDE 0435
Part 3011 and IEC 60255–8
Nominal current of the device
Current threshold up to which
the above formula is valid
Alarm
1
); 2 % class per
) > 1.25;
N
C53000-G1176-C149-3
1
)
1
)
7UM62 Manual
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