High Speed Fuses
Square Body Fuses
Introduction
Square Body Contents
Application Information
Volts
(IEC/UL)
Size
000,00
Class
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
aR
Fuse Style
DIN 43 653
Flush End Contact
DIN 43 620
DIN 43 653
Flush End Contact
US Style
French Style
Fuse Curves
DIN 43 620
Flush End Contact
Flush End Contact
DIN 43 620
DIN 43 653
DIN 43 653
Flush End Contact
US Style
Fuse Curves
Flush End Contact
Flush End Contact
DIN 43 653
Flush End Contact
US Style
Fuse Curves
Flush End Contact
Flush End Contact
Flush End Contact
Page
115-116
Page
117-119
117-119
120-121
122-123
124-125
126-127
128-129
130-131
132-134
135-136
137-139
140-143
144-145
146-147
148-149
150-151
152-153
154-156
157-159
160-161
162-163
164-165
166-167
168-170
171-172
173
174-184
General Information
Designed and tested to:
• IEC 60269: Part 4
• UL Recognized
Cooper Bussmann offers a complete range of square body
style fuses and accessories. Their unique design and
construction provide:
• Minimal energy let-through (I
2
t)
• Low operating temperature
• Low watts loss
Square body style fuses are a very attractive solution for high
power applications which require a compact design with
superior performance. The construction and design of square
body style fuses make it easy for Cooper Bussmann to
manufacture custom products. Our cataloged offering
provides only a sample of the wide variety of product which
is available.
Each square body style fuse is available with a number of
different end fittings. Options include:
• DIN 43 653
• DIN 43 620
• Flush End (Metric/US)
• French Style
• US Style
Voltage Rating
All Cooper Bussmann square body style fuses are tested to
IEC 60269: Part 4. This standard requires a test voltage
which is 5% higher than the rated voltage. In North America,
fuses are required to clear only their rated voltage.
Accessories
Square Body style fuses are available with three different
open fuse indicator systems. Options include visual
indication and indication utilizing a microswitch. Fuse
blocks are also available for most applications.
690/700
1*, 1, 2, 3
1*, 2, 3
4
23, 24
00, 1, 2, 3
00
1*, 1, 2, 3
4
24
1*, 1, 2, 3
1250/1300
4
23
5
1000
1000-2000
DC Fuses
Accessories
Indicator System
Fuse Bases
Square Body Fuse Ranges
Amps
10-7500
50-1400
Volts
690
1250
AC
X
X
DC
—
—
Page
185
186
114
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
High Speed Fuses
Square Body Applications
Maximum Permissible Load Current
The rated current value of Cooper Bussmann fuses is based
on the ambient temperature in the space immediately below
the fuse of 20°C. The following graph gives correction factors
(k) for a range of temperatures (–40°C to +80°C). Maximum
permissible continuous load currents can be calculated by
applying the following formula:
Ib
≤
In
≈
k
≈
(1 + 0.05 V) x Kb
where
Ib = Maximum permissible continuous load current
In = Rated current of fuse
k = Temperature correction factor
v = Velocity of cooling air in m/s (max. 5 m/s).
Kb = Fuse load constant 1.0
k
Temperature Correction Curve
1.4
1.2
1
0.8
0.6
–
40
–
20
0
20
40
60
80
C
High Speed
Fuses
The maximum permissible continuous load current Ib of a
fuse can be checked empirically (i.e., by satisfying the
formula below) by making simple voltage and temperature
measurements under actual operating conditions after the
fuse has been installed in its operating location and loaded
at the calculated Ib value:
E
2
≈
(0.92 + 0.004t)
≤
N
E
1
where
E
1
= Voltage drop across fuse after 5 seconds
E
2
= Voltage drop across fuse after 2 hours
t = Air temperature at start of test (°C)
N = Constant
Fuse Rated Voltage (IEC) N
690
1.5
1250
1.6
Body Cross Section
Standard fuse program includes barrels with different cross sections.
Size
Maximum
Cross-section
(mm)
000
21 ≈ 36
00
30 ≈ 47
1
45 ≈ 45
1
53 ≈ 53
2
61 ≈ 61
3
76 ≈ 76
4
105 ≈ 105
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
115
High Speed Fuses
Square Body Applications
Example Application of Square Body High Speed
Fuses Subject to Overload and Impulse Loading
Select a short-blade indicating fuse with indicator/adapter to
permit the use of a single-pole microswitch for remote
indication and determine if the fuse selected will meet the
following application parameters.
Application Parameters
Load Currents Expected
Load Type
Duration
(
1) Normal
Continuous
(2) Overload
(3a)
Overload
(3b)
(4) Impulse
60 Seconds
10 Seconds
20 Seconds (max.)
0.5 Seconds
170M3669 (400A)
10
3
Frequency of Occurrence
—
Once Per Hour
2-3 Times Per Week
Once Per Month
Less Than Once Per Month
Amps
10
2
Time In Seconds
A
10
1
A
300A
500A
700A
1100A
400V
Voltage Data
(5) Voltage Applied to Fuse During Fault Conditions
(+10%)
Temperature Data
(6) Temperature Inside Cubicle in Which Fuse is Located (Natural Convection Cooling Only)
60°C
10
0
Thyrister Data
(7) Thyrister Peak Voltage Withstand
1000V
2
(8) Thyrister I t Withstand at 10 Milliseconds*
90,000A
2
s
2
*Note: The I t withstand of the thyrister may be given for other impulse durations (i.e., 1.5 ms,
3.5 ms, or 8.3 ms); however, the stated fuse I
2
t is valid for all impulse durations of 10 ms or
less.
10
–1
Application Procedure
Step
(1) Select a short-blade fuse to permit
mounting of microswitch 170H0069
Procedure
1.1 Taking into consideration only the
continuous load current and ambient
temperature, from Table on page 127
tentatively select fuse 170M3669
400A, 690V).
Remarks
10
–2
10
2
10
3
Current In Amperes
—
Calculation of Watt Loss
From the Table on page 127, watt loss at 400 amps is 60
watts. The continuous load current of 300A is 75% of rated
current (400A). From page 126, the correction factor
Kp = 0.5.
Watt Loss 75% = Watt Loss 100%
≈
Kp
= 60W
≈
0.5
= 30 watts
Special Fuses
—
(2) Determine I
2
t (total clearing) at 440V.
2.1 See Table, page 127. Note I
2
t is
105,000A
2
s at rated voltage of 690V.
2.2 From the figure on page 126, note that
OK
correction factor K = 0.65.
2
2
2.3 I t660V
≈
K = I t440V
105,000
≈
0.65 = 68,250
3.1 From the figure on page 126, note that
OK
maximum voltage at 440V is 900V
4.1 Per page 115 data,
Ib = In ≈ k ≈ (1 + 0.05V) ≈ Kb
Ib = 400A ≈ 0.8 ≈ (1 + 0) ≈ 1
Ib = 320A
5.0 Calculate Imax per Table,
High Speed Fuse Application Guide
page 16, for each overload and impulse
load.
5.1
Imax < 60% ≈ It
500A < 60%
≈
950A
500A < 570A
5.2 Imax < 60% ≈ It
700A < 60% ≈ 1360A
700A < 780A
5.3 Imax < 70% ≈ It
700A < 70% ≈ 1150A
700A < 805A
5.4 Imax < 70% ≈ It
1100A < 70% ≈ 1800A
1100A < 1260A
(3) Determine maximum arc voltage
at 440V
(4) Determine maximum permissible
continuous load current Ib.
—
(5) Plot a “line profile” showing the
expected load and overload currents.
Determine that overload and impulse
load currents do not exceed their
maximum permissible values.
(Item 2)
OK
(Item 3a)
Other high speed fuses are available from Cooper
Bussmann with voltage ratings of 380 to 10,000V and current
ratings up to 10,000A in a single unit configuration. Fuses
can be supplied with open fuse, “pin” indicators. Various
types of microswitches are also available (see page 185).
OK
(Item 3b)
OK
(Item 4)
OK
The tentatively selected fuse 170M3669 with microswitch 170H0069 meets all application parameters; no further
selection would be necessary.
116
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
Profile Line
High Speed Fuses
Square Body DIN 43 653 — 690V/700V (IEC/UL): 10-400A
690V/700V (IEC/UL) 10-400A
Specifications
Description:
Square body DIN
43-653 stud mount high speed
fuses.
Dimensions:
See dimensions
illustration.
Ratings:
Volts: — 690Vac (IEC)
— 700Vac (UL)
Amps: — 10-400A
IR: — 200kA RMS Sym.
Agency Information:
CE,
Designed and tested to IEC
60269: Part 4, UL Recognized.
UL Recognition/CSA Component
Acceptance on Size 000.
Electrical Characteristics
Total Clearing I
2
t
The total clearing I
2
t at
rated voltage and at power
factor of 15% are given
in the electrical
characteristics. For other
voltages, the clearing I
2
t is
found by multiplying by
correction factor, K, given
as a function of applied
working voltage, Eg, (rms).
1.5
K
1.0
Arc Voltage
This curve gives the
peak arc voltage, UL,
which may appear
across the fuse during
its operation as a
function of the applied
working voltage, Eg,
(rms) at a power factor
of 15%.
Power Losses
Watts loss at rated
current is given in the
electrical characteristics.
The curve allows the
calculation of the power
losses at load currents
lower than the rated
current. The correction
factor, Kp, is given as a
function of the RMS
load current, Ib, in % of
the rated current.
1.4
1.2
10
3
9
8
7
6
5
4
3
U
L
E
g
200
300
400
500
600 690
1.0
K
p
0.8
0.6
0.5
0.4
0.3
0.2
High Speed
Fuses
0.1
30 40 50
60
70
I
b
80 90 100%
0.5
0.4
0.3
0.2
Features and Benefits
• Excellent DC performance
• Low arc voltage and low energy let-through (I
2
t)
• Low watts loss
• Superior cycling capability
E
g
100 200 300 400 500 600 690
Dimensions (mm)
Type -U/80, -/80, -TN/80
Siz e
000
00
D
40
51
E
21
30
F
20
28
G
51
67
H
8
10
K
2
2
•
•
•
•
Typical Applications
DC common bus
DC drives
Power converters/rectifiers
Reduced voltage starters
For Other Voltage Ratings in This Body Style
• See page 144 (1000V)
1mm = 0.0394” / 1” = 25.4mm
54
Indicator
Dimensions (mm)
Type 00B/60, 00BTN/60
*
1mm = 0.0394” / 1” = 25.4mm
M8
D
K
30
6
64
54 Max
G
100
78
48
E
H
F
62
* Indication for Size 00 fuses is a red pin.
Indicator
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
117
High Speed Fuses
Square Body DIN 43 653 — 690V/700V (IEC/UL): 10-400A
Catalog Numbers
-U/80
Without
Indicator
170M1308
170M1309
170M1310
170M1311
170M1312
170M1313
170M1314
170M1315
170M1316
170M1317
170M1318
170M1319
170M1320
170M1321
170M1322
Catalog Numbers
-TN/80
-/80
Type T
Visual
Indicator
Indicator
for Micro
170M1358
170M1408
170M1359
170M1409
170M1360
170M1410
170M1361
170M1411
170M1362
170M1412
170M1363
170M1413
170M1364
170M1414
170M1365
170M1415
170M1366
170M1416
170M1367
170M1417
170M1368
170M1418
170M1369
170M1419
170M1370
170M1420
170M1371
170M1421
170M1372
170M1422
170M2608
170M2658
170M2609
170M2659
170M2610
170M2660
170M2611
170M2661
170M2612
170M2662
170M2613
170M2663
170M2614
170M2664
170M2615
170M2665
170M2616
170M2666
170M2617
170M2667
170M2618
170M2668
170M2619
170M2669
170M2620
170M2670
170M2621
170M2671
00B/60
Visual
Indicator
00BTN/60
Type T
Indicator
for Micro
Electrical Characteristics
Rated
Current
RMS-Amps
10
16
20
25
32
40
50
63
80
100
125
160
200
250
315
25
32
40
50
63
80
100
125
160
200
250
315
350
400
I
2
t (A
2
Sec)
Clearing
Pre-arc at 660V
3.8
25.5
7.2
48
11.5
78
19
130
40
270
69
460
115
770
215
1450
380
2550
695
4650
1200
8500
2300
16000
4200
28000
7750
51500
12000
80500
19
130
28.5
195
50
360
95
640
170
1200
310
2100
620
4150
1000
6950
1900
13000
3400
23000
6250
42000
10000
68500
13500
91500
18000
125000
Watts
Loss
3.0
5.5
7
9
10
12
15
16
19
24
28
32
37
42
52
6
7
9
10
12
15
20
25
30
35
45
55
60
70
Siz e
000
170M2708
170M2709
170M2710
170M2711
170M2712
170M2713
170M2714
170M2715
170M2716
170M2717
170M2718
170M2719
170M2720
170M2721
170M2758
170M2759
170M2760
170M2761
170M2762
170M2763
170M2764
170M2765
170M2766
170M2767
170M2768
170M2769
170M2770
170M2771
00
•
•
•
•
Watts loss provided at rated current.
Microswitch indicator ordered separately.
See accessories on pages 185-186.
For fuse curves see page 119.
118
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
