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Accessories and Spare Parts

Operation manual b maXX BM4100 (NWR)

Document no.: 5.04052.09

119

of 142

The surge protection module limits the phase-to-phase voltage to 550 V.

In operation overvoltages can be expected in case of mains failure. Because the detec-

tion of a mains failure is delayed and it takes time for identifying a mains failure the mains

inverter continues to work a few 10

ms normally. In this case an oscillating ciruit consis-

ting of a series connection of mains filter (and its capacitors) with the commutating choke

and the IGBTs plus the DC capacitors is formed. The surge protection module limits the

peak voltages of this oscillating circuit.

The surge protection module is an integral part of the BM4100´s protection against over-

voltage from the mains as well as against overvoltage in case of mains failure in combi-

nation with the required mains filter and the required commutating choke.

NOTE

If the surge protection module BFO-3-550-00X is not used or not connected accor-

ding connection diagram any kind of claim to warranty will expire for the b maXX

4100 active mains converter.

NOTE

The surge protection module BFO-3-550-00X must be also used in UL certified ap-

plications. The surge protection module is a mandatory component of the UL file re-

lating to the BM4100 active mains inverter.

NOTE

It can be assumed that the surge protection module is damaged or thermal destroyed

if it is stressed with voltages of 550

V and higher over a longer period (several se-

conds or even constantly).

We request our customers to change the surge protection module in case of above

mentioned overvoltage for their customers by way of precaution

Baumuller b maXX 4100 Series User Manual

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