FMM-British BS 88 690V 400-700A - 伊顿EATON BUSSMANN产品资料中心

Description:
BS 88 style stud-mount fuses.

Ratings:

Volts: 690Vac/500Vdc

Amps: 400-700A

IR: 200kA RMS Sym.

Agency Information:
CE, Designed and tested to: BS 88 Part 4, IEC 269 Part 4, UL Recognized.

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
400FMM 450FMM 500FMM 550FMM 630FMM 700FMM	FMM	400 450 500 550 630 700	10000 15000 20000 30000 45000 60000	40000 60000 82000 120000 180000 245000	72500 105000 150000 215000 310000 420000	85 90 100 100 100 120

• Watts loss provided at rated current.

Time-Current Curve

Peak Let-Through Curve