- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄22418 > 012660 (WEIDMULLER) 47 A, MODULAR TERMINAL BLOCK, 1 ROW, 1 DECK PDF資料下載
參數(shù)資料
| 型號： | 012660 |
| 廠商： | WEIDMULLER |
| 元件分類： | 接線盒 |
| 英文描述： | 47 A, MODULAR TERMINAL BLOCK, 1 ROW, 1 DECK |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 1970K |
| 代理商： | 012660 |
Protection against
induced voltages
Measures to avoid the risk of shock
from pilots or equipment connected
thereto include:
q Disconnection of the equipment from
the pilots by removing appropriate links.
q Earthing of the pilot circuits at a
convenient position near the point of
work.
q Connection of metering, control and
telecommunication circuits via barrier
equipment.
Electricity Supply
Industry Standard
The Electricity Supply Industry
Standard ESI 12-4 1973 gives a
detailed specification for pilot
termination and barrier equipment.
The main functional requirements of
this equipment are:
q Insulation of pilot circuits from earth
and from station wiring to the specified
induced voltage level, arranged so as
to eliminate the possibility of casual
contact by personnel.
q Disconnection of pilot cable conductors
from local pilot circuits.
q Application of test connections to pilot
cable conductors and/or local pilot
circuits.
q Earthing of pilot cable conductors
and/or local pilot circuits.
q Connection of all pilot cable conductors
together, but free from earth.
q Due to its position at the end of the
pilot cable, the terminating box is also
the point where the metallic covering of
the pilot cable, normally earthed, can
be disconnected from earth so as to
apply a voltage test to check the
integrity of the cable oversheath. An
insulated gland-plate is therefore
necessary.
Terminating Equipment
Barrier Equipment
This is normally built into other
switchgear control panels located in
the substation control buildings and
hence terminals from the standard
Weidmüller range are often used.
It should be noted that on the local
pilot circuit side of the isolating
transformers, the terminals (item A of
Fig 4) are still subject to the transient
high voltage surges under system
earth-fault conditions. If Weidmüller
terminals are used here, or as feed
through terminals to some other piece
of protected equipment, the 15kV
insulation level must be maintained,
and to achieve this we recommend
that Weidmüller terminal type SAKH6
should be used.
Weidmüller can quote for special
assemblies of equipment in
enclosures for this or any other
type of protection on provision of
full specification of requirements.
References
Engineering Recommendation S.5/1
‘Earthing Installations in Substations’
E.R.A. Report M/T 126, 1958
‘Interference between power systems
& telecommunication lines’
EA Tech Spec 50-18:
‘Design & Application of Ancillary
Electrical Equipment’ including
‘Terminal Blocks’ and ‘Electrical
Terminations’
EA Tech Spec 09-6:
‘Auxiliary Multicore & Multipair Cables’
ESI 12-4:
‘Terminating Equipment for Pilot
Cables subject to Induced Transient
Voltages exceeding 650V rms’
EN 50 022:
(BS 5584:1978) ‘Low Voltage
Switchgear and Controlgear for
Industrial Use. Mounting rails 35mm
wide for snap-on mounting of
equipment.’
Fig. 4: Typical arrangement of terminating equipment
Fig. 3: Single line diagram of pilot cable terminating equipment
The terminating equipment and barrier equipment are normally located in
separate housings as shown in this diagram. The barrier equipment comprises
isolating transformers which give the required insulation level.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 0126620000 | 57 A, MODULAR TERMINAL BLOCK, 1 DECK |
| 0128300000 | 36 A, MODULAR TERMINAL BLOCK, 1 ROW, 1 DECK |
| 0130600000 | INTERCONNECTION DEVICE |
| 0130700000 | INTERCONNECTION DEVICE |
| 0132-0-15-15-30-27-04-0 | BERYLLIUM COPPER, GOLD (30) OVER NICKEL FINISH, PCB TERMINAL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 0126600000 | 制造商:WEIDMULLER 制造商全稱:Weidmuller 功能描述:SAK-series |
| 0126620000 | 制造商:Weidmuller 功能描述: |
| 012662924 | 制造商:ABB Low Voltage Products and Systems 功能描述:FEM4A BLUE END SECTION |
| 012665751 | 制造商:NAVAL SURFACE W 功能描述: |
| 01-266-5751 | 制造商: 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。