Switching And Protection Devices; Tap Changers - DAELIM GREEN EP TECH Operation & Maintenance Manual

6. Switching and Protection Devices

ELECTRICAL SHOCK: Can cause severe injury, death, or damage to equipment. De-energize transformer
Fromaremoteupstreamsourcebeforeoperatingno-loadtap-changers,dual-voltageswitches,or
Delta-wye switches.

6.1 Tap Changers

Externally operated No-Load Tap changer (NLTC) (Fig. 14 A & B)is provided foralltransformers, unless
otherwise specified, to change from one operating voltage to another. Typical taps are configured at ±2 X 2.5%
of rated voltage; this means that the output voltage of the transformer can be adjusted in 2.5% increments
Tap-changers will have a hot stick operable handle. There are two styles of tap-changer with this type of
handle, each requiring a slightly different method for changing tap settings
Fig. 14A
Please refer to Name Plate and other supplied information for more details.
No.4 Business Building-2707, China Central Place
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.
.
Fig. 14B
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