ABB OVRHLD Series Manuale di installazione, funzionamento e manutenzione - Pagina 7
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Electrical connections
—
2-wire circuits
L
N
G
EARTH
GROUND
GROUND
SPD
OVRHLD-xx-yyy-6
For single phase voltages where L-N could be
120, 230, or 277
—
3-wire circuits
EARTH
GROUND
SPD
OVRHLD-xx-yyy-2
For split single phase and "2-legs off a Wye" circuits L-N at 120, 230, or 277.
Service may be 120/240V 1 phase 3-wire or 208Y/120V 2 phase 3-wire
L
N
G
EARTH
SPD
OVRHLD-xx-yyy-1
OVRHLD-xx-yyy-4
OVRHLD-xx-yyy-5
L
N
L
G
EARTH
GROUND
L
N
L
G
—
4-wire circuits
EARTH
GROUND
SPD
OVRHLD-xx-yyy-1
For three phase circuits, 120/208, 220/380, 230/400, 240/415
and 277/480
L
N
L
G
SPD
OVRHLD-xx-yyy-3
L
L
N
L
G
EARTH
GROUND
OVRHLD-xx-yyy-2
7
L
L
N
L
G
SPD