Abbreviation-03 [Abbreviation]
トランス型
EVT(Earthing Voltage Transformer)--------接地形計器変圧器 JEM1115-1989
GVT(Ground Voltage Transformer)----------接地形計器変圧器(JSIA-T005-1993 現在は削除)
ZPT(Zero Phase Potential Transformer)----同上---とあるメーカーの製品名
コンデンサ型
ZVT(Zero Phase Voltage Transformer)------零相計器用変圧器 JEM1115-1997
ZPD(Zero Phase Potential Device)--コンデンサ形接地電圧検出装置 旧JEM
ZPC-----光商工?の商品名(零相蓄電器、零相電圧検出用コンデンサ)
Abbreviation-02 [Abbreviation]
NB =======> Nominal Bore (internal diameter of a pipe/fitting)
HRC fuse =====> High Rupturing Capacity
PVC =====> polyvinyl chloride
PVC-U =====> unplastifiated or rigid PVC
GRP Pipe =====> glass-reinforced plastic pipe
HDP=====> high density polyethylene
GLS lamp=====> General Lighting Service
EEPROM =====> Electronically Erasable and Programmable Read Only Memory
電気的に内容を書き換えることができるROM。内容の変更には通常より高い電圧を用い、また部分的な変更はできない(一旦すべて消去しなければ書き込めない)。書き込める回数にも制限がある。
EPROM =====> Erasable Programmable Read Only Memory
記憶の消去・書き込みを何度でも行えるROM。記憶の消去に、読み出し時とは全く異なる特殊な方法を用いる点でRAMとは異なる。記憶の消去に紫外線を用いるUV-EPROMと電気的に記憶を消去できるEEPROMの2種類に大別される。
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Abbreviation-01 [Abbreviation]
For the purpose of these Requirements the following abbreviations of electrical terms have been used.
R-red phase
Y - yellow phase
B - blue phase
ac - alternating current
dc - direct current
A - amp
mA - milliamp
V - volt
kW - kilowatt
kVA - kilovolt amp
kWh - kilowatt hour
MVA - megavolt amp
Hz - hertz (cycles per second)
SP - single pole
SP&N - single pole and neutral
DP - double pole
TP - triple pole
TP&N - triple pole and neutral
SP&SwN - single pole and switched neutral
TP&SwN - triple pole and switched neutral
MCB - miniature circuit breaker
MCCB - moulded case circuit breaker
ELCB - earth leakage circuit breaker
RCD - residual current device
MCC - motor control centre
PFC - power factor correction
PF - power factor
CP - control panel
UPS - uninteruptible power supply
PLC - programmable logic controller
MMI - man machine interface
PC - personal computer
I/O - input / output
SPD - surge protection device
LED - light emitting diode





