T1689 Technical Manual Rev 07 CDM Assembly
MV3000 Air Cooled DELTA Receipt & Storage of Equipment
Page 111
5.2 RECEIPT & STORAGE OF EQUIPMENT
5.2.1 For immediate installation
If the product is to be built immediately into equipment, before starting work the contents of the equipment
supplied should be carefully unpacked and inspected.
Check the complete consignment against the delivery note for any shortages or loss in transit.
Damaged or missing parts must be reported immediately to the supplier and the following details quoted:
• List of damaged or missing items with names and part numbers;
• Description of damage;
• Delivery/advice note numbers; dates; order numbers; item numbers.
If the equipment delivered to site is not to be installed immediately:
• Re-pack it in its original packaging material - if this is not possible it should be enclosed in
polythene sheet to protect it from the ingress of dust;
• Store it in a clean dry atmosphere, preferably at room temperature - DO NOT EXCEED the storage
temperature limits referred to in Table 2–3;
• Ensure that, if the equipment is stored for a long period of time, usually greater than two years,
the equipment supplier is contacted for advice about reforming the d.c. link capacitors before the
equipment is put into service;
• If the equipment is unpacked in a warm environment condensation may occur - if condensation is
seen do not use the equipment until its temperature has stabilised to that of the working
environment;
NOTE: Whenever possible retain and store the original packing materials for use if a product has to be returned for
repair. See Section 13: Contact Details for Sales, Service & Support.
5.2.2 For long term storage
If the product is to be installed at a later date or is being kept for spares:
• Retain the product within the packaging supplied – only remove when required.
• The modules are fragile and vulnerable to damage – handle and store carefully.
• Handling of the packed modules must be with appropriate pallet trucks or fork-lift trucks.
• Store in a dry area and protect from external water ingress.
• Maintain environmental levels within those defined in Table 2–3.
• If the packaging that the module is supplied in is considered inappropriate for the location where
they are to be stored, do not remove the existing packaging but locate within an additional
protective packaging.
5.2.3 Electrolytic Capacitor Shelf Life
The storage life of a variable speed drive is determined by the shelf life of the electrolyte capacitors used in the
product.
In the case of AC Drives these are:
• The main DC Link Capacitors;
• The small capacitors on the electronic control boards.
After long periods of storage, these capacitors will eventually ‘de-polarise’ and become ineffective. The effects
of this are difficult to predict as too many variables are involved. The symptoms could include random or
spurious trips, power supply failures, or extreme levels of ripple on the DC bus. Excessive capacitor leakage
could also lead to overheating of pre-charge resistors.
The shelf life of the electrolyte capacitors varies with storage temperature. The higher the temperature – the
shorter the shelf life.
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