cooper bussmann

MMT-British BS 88 690V 180-710A

  
Description:
BS 88 style stud-mount fuses.
 
Ratings:
Volts: 690Vac/500Vdc
Amps: 6-710A
IR: 200kA RMS Sym.
 
Agency Information:
CE, Designed and tested to: BS 88 Part 4, IEC 269 Part 4, UL Recognized. 350Vdc (IEC) rating. Consult Cooper Bussmann for UL Recognition status.
 
Electrical Characteristics
Total Clearing I2t
The total clearing I2t at rated voltage and at power factor of 15% are given in the electrical characteristics. For other voltages, the clearing I2t is found by multiplying by correction factor, K, given as a function of applied working voltage, Eg, (rms).

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.
 
Features and Benefits
• Excellent cycling capability
• Excellent DC performance
• Low arc voltage and low energy let-through (I2t)
• Low watts loss
 
Typical Applications
• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters

Dimensions (mm)


Catalog Numbers
Catalog Numbers Type Rated Current RMS-Amps I2t(A2 Sec) Watts Loss
Pre-arc Clearing
at 415V at 660V
180MMT
200MMT
225MMT
280MMT
315MMT
355MMT
400MMT
450MMT
500MMT
560MMT
630MMT
710MMT
MMT 180A
200A
225A
280A
315A
355A
400A
450A
500A
560A
630A
710A
1650
2200
3700
6600
8600
13500
21000
30000
42000
60000
68500
78000
12000
16000
26000
47000
62000
97000
150000
220000
300000
430000
500000
600000
18000
23000
40000
70000
91000
140000
220000
320000
450000
640000
720000
850000
42
42
42
47
51
54
60
57
64
64
86
105



Time-Current Curve


Peak Let-Through Curve


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