No.4 Business Building-2707, China Central Place
Email:[email protected]
Chaoyang District, Beijing-100021, China
北 京 大 林 绿 源 环 保 科 技 有 限 公 司
BEIJING DAELIM GREEN EP TECH CO., LTD.
3.2 Storage for more than 90 days
AllDaelim transformers are shipped with a 2 psi dry nitrogen blanket. During long term storage, it is
recommendedthatthisnitrogenblanketbe maintainedbytheadditionof abottle ofdrynitrogen,througha
regulator, to the transformer tank. If the unit is equipped with anti-condensation heaters in the control
cabinets, they should be energized and checked for proper operation. Units with any enclosed air filled spaces,
suchascontrolcabinetsandAirTerminalChambers,shouldbesuppliedwith anappropriateamountof
moisture absorbing desiccant packets. Desiccant should be monitored and replaced in regular maintenance
intervals as moisture levels in the storage area dictates.
3.3 Removable Radiators
Daelim ships all transformers, when possible, completely assembled and ready for use. In the event that
removableradiatorsareshippedseparatelytoaccommodateshippingorspacerequirements,radiator
openings are shipped with temporary protective caps. Ensure these protective caps are tightly sealed before
storage.
CAUTION:
Radiator assemblies should never be stored directly on the ground or in areas in which
water could collect near sealed openings.
4. Installation
4.1 Pre-service inspection
ELECTRICALSHOCK:
Neverattempttochangeconnectionsonanenergizedtransformer.All
installation, maintenance, or repair should be performed by trained, experienced, and qualified
personnel only.
New transformers, or transformers which are being activated after a period of storage, should be thoroughly
inspectedbeforebeingconnectedtothepowerdistribution systemto identifydamagewhichmayhave
occurred during storage.
1. The transformer exterior should be inspected for nicks, dents, and scratches. Repair damage to
weather-resistant finishes promptly.
2. The tank cover and manhole/hand hole cover seals and all gaskets or seals at bushings, gauges, fuses,
operating devices, etc., should be inspected for evidence of insulating liquid seepage. Repair leaking or
improperly tightened gaskets and seals before the transformer is placed in service.
3. The liquid level inside the tank must be checked (read directly form gauge on transformers equipped
with liquid levelgauge).
4. Basic electrical tests should be conducted before energizing a transformer which was stored for a
period of90days or more. Tests include DC insulation Test and Transformer TurnsRatio (TTR). The
resultsofthesetestsshouldbeverifiedwiththeoriginalfactorytestresultstoassuretheyarestill
within acceptable limits.