Avoiding Damage To The Imd; Connecting The Safe Energy; Switching Mains On And Off; Overloading The Ballast Resistor - Deif IMD 100 Series Integration Manual

IMD 100 Integration manual 4189360015 Rev. G

3. Avoiding damage to the IMD

Certain situations may result in product damage and should therefore be avoided by observing the
precautions described in this section. These situations are not likely to occur under normal use of the
IMD, but might occur in the lab or during service.
The situation list may not be comprehensive. Other, unknown situations that are not described in this
section could occur.

3.1 Connecting the safe energy

Possible damage: Damage to
How to avoid:
If the safe energy was disconnected from the SE terminals, the mains supply must be
turned on before the safe energy is turned on.

3.2 Switching mains ON and OFF

Possible damage: DC-link Pre-charge circuit damaged due to repeated MAINS ON and OFF
operations
How to avoid:
If the MAINS connections are switched ON and OFF more than once, wait 60 seconds
before switching ON after switch OFF.

3.3 Overloading the ballast resistor

Possible damage: Ballast circuit ((switch or resistor) damaged due to overload.
How to avoid:
•
The ballast resistor value is adequate for the DC-link Vmax.
•
Never use single pulse longer than 1 s during safe energy test.
•
Wait 10 minutes (at 25ºC) if the IMD is restarted and the ballast resistor has been
loaded (hot)

3.4 Connecting the mains with overvoltage

Possible damage: Total damage to the IMD.
How to avoid:
The mains supply must never exceed the range specified in the Data sheet.
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Avoiding damage to the IMD
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