176 Maintenance instructions Manual Power Quality Filter PQFS
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10 Maintenance instructions
10.1 What this chapter contains
This chapter contains the maintenance instructions for the active filter. Although your
PQF has been designed for minimum maintenance, the following procedure should be
carefully followed to ensure the longest possible lifetime of your investment.
WARNING: All maintenance work described in this chapter should only be undertaken
by a qualified electrician. The safety instructions presented in Chapter 2 of this manual
must be strictly adhered to.
WARNING: High AC and DC voltages may be present in the filter panel. Do not touch
any filter parts unless you have ascertained that they do not carry dangerous voltage
levels.
WARNING: Under no circumstances close the main contactor manually. Failure to
adhere to this guideline may result in physical injury and/or in filter damage.
10.2 Maintenance intervals
Table 55 lists the routine maintenance intervals recommended by ABB. Depending on
the operating and ambient conditions, the intervals of Table 55 may have to be reduced.
Announced intervals assume that the equipment is operating under ABB approved
operating conditions (Cf. Chapter 12).
Table 55: Filter maintenance intervals recommended by ABB
Maintenance Intervals Instructions
procedure
Depending on the dustiness/dirtiness of
the environment, at least once per year.
Cooling fan(s) change Every 4 years for the “fan in”(35000 hours)
Every 3 years for the “fan out”(27000 hours)
Section 10.4
DC capacitor change
Every 8 years for 3-wire connection
Every 5 years for 4-wire connection
Section 10.5
Output filter board change Every 5 years Section 10.7
For convenience Section 10.6 presents a maintenance template that can be used by the
maintenance engineer.
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