ABB OVRHLD Series 설치, 운영 및 유지보수 매뉴얼 - 페이지 6
{카테고리_이름} ABB OVRHLD Series에 대한 설치, 운영 및 유지보수 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. ABB OVRHLD Series 8 페이지. Surge protective devices
페이지 인쇄6
OVRH LD SE RIES S U R G E P R OT E C T I V E D E V I C E S
—
Operation
Monitoring
On some models the internal condition of this
device and its protective function are monitored by
green LEDs on the face of the unit. When the LEDs
are lit, the suppressor is functioning properly and
providing protection.
Model
OVRHLD-yy-xxx-1
OVRHLD-yy-xxx-2
OVRHLD-yy-xxx-3
OVRHLD-yy-xxx-4
OVRHLD-yy-xxx-5
OVRHLD-yy-xxx-6
OVRHLD-yy-xxx-7
OVRHLD-yy-xxx-8
OVRHLD-yy-xxx-9
Where yy = 20, 25, 30
Where xxx= 120, 127, 230, 277
* Within 20m of service entry, minimal to moderate lightning enviroment
For poorly regulated 120 Vac circuits, and for 127–138 Vac L-N circuits, use LDPyy-127-z
Protetion Modes
Optimum application/location
L1–N, N–G (1 LED)
2 or 4-wire branch circuit (local lightning conditions)
L1–N, L2–N (2 LEDs)
3 or 4-wire service entry*
L1–G, L2–G (2 LEDs)
3-wire L-L branch circuit w/o neutral connected loads
L1–G, N–G (1 LED)
2-wire incoming branch circuit, common mode lightning protection
L1–N, L1–G (2 LEDs)
2-wire branch circuit (no local lightning)
L1–N (1 LED)
2-wire service entry*
L1–G (1 LED)
2-wire service entry*
N–G (0 LEDs)
Branch circuit, common mode lightning protection
L1–L2 (1 LED)
L-L Branch circuit
Replace the OVRHLD suppressor
if a light is out
At the end of life, the OVRHLD Surge Protective
Device (SPD) will generally fail open circuited and
not trip a dedicated breaker if used. If the breaker is
found tripped, it should be reset: If it retrips, replace
the suppressor. If it resets and the green LEDs
remain lit, the suppressor is sound and use may be
continued.