ETS-Lindgren EMI, Installation And Maintenance Manual

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13
MAINTENANCE
LETHAL VOLTAGES PRESENT. RISK OF ELECTRIC SHOCK.
AFTER REMOVING POWER FROM THE UNIT, THE AUTOMATIC BLEEDER RESISTORS WILL
DISCHARGE THE UNIT TO 50 V IN FIVE (5) SECONDS.
USE A SHORTING STICK (NOT INCLUDED) TO TOUCH ALL METALLIC SURFACES
EXPOSED BEFORE TOUCHING THE FILTER.
Only qualified personnel should operate or service this equipment.
Periodically power down the filter and remove the wiring compartment lids to check inside for dirt, debris and corrosion.
Oil, dirt, debris and corrosion inside the filter compartments should be removed according to appropriate procedures.
User’s own procedures for the removal of spills, dirt, debris and corrosion should suffice. Should EMI gasket become
torn or unusable, contact ETS-Lindgren to order replacement part E-903-008 or E-903-016, depending on the
size of filter.
The MOV arrestor (if provided) should be replaced annually, when it is estimated that a high incidence of over voltages
have occurred during that year.
Once a filter is properly installed it typically does not require maintenance under normal operating conditions. However,
if there is an extraordinary event affecting the filters (such as a severe voltage overload or water entering the wiring
compartments), then the following procedures should be followed depending on the nature of the event. Follow the
INSPECTION AND CLEANING OF WIRING COMPARTMENTS procedure after an event that causes abnormal
contamination of filter wiring compartments with liquid or debris. Follow the CAPACITANCE MEASUREMENT AND
MOV INSPECTION PROCEDURE following an event that causes abnormal voltage overloads or spikes beyond that
which the filters are designed to accommodate.
Frequency of maintenance is at the discretion of the user and may be included in a routine maintenance
schedule for the connected equipment. However, filters in clean, industrial environments typically do not
require maintenance.
Inspection and Cleaning of Wiring Compartments
1. Remove power from the filter(s).
2. Wait at least sixty (60) seconds, then remove the wiring compartment covers.
3.
Short the filter terminals to the filter case using a conductive shorting stick (not included) to ensure that the filter
capacitors are fully discharged.
4. Inspect the filter terminals and insulators for contamination and/or damage.
5. If the terminals or insulators are cracked or damaged replacement in the field is not possible.
Call ETS-Lindgren for instructions.
6. Clean the terminals and insulators as necessary, and remove any loose debris from the wiring compartments.
7. Re-install the wiring compartment covers. Ensure even compression of the RF gasket around the RF tight
wiring compartment. Begin by torquing all of the cover screws to 1 N-m, starting in the center of each flange
and working out towards the corners. Then, using the same pattern torque all screws to 5 N-m.
8. Re-apply power to the filter(s).