Hitachi EC702MP-BB3, Operation Manual

Page: 86 / 108

86 | 108
E-Compact MP-BB3 Series
4.6.2. Sparkover - Phase Surge Protection Device (SPD)
It is a device that limits overvoltages in the mains by diverting the current line to the ground in order to limit
the amplitude of this overvoltage to a value that is not dangerous to the equipment. It is connected in
parallel between the line and the ground and has high impedance. Once the transient overvoltage appears
in the system the impedance of the device decreases and directs the current to earth, protecting the
equipment. When this occurs the device signals a red flag, calling for replacement:
Sparkovers types:
Never open the device: as there is a risk of electric shock. If necessary, contact Comark
customer support.
Before Connecting the Machine to the AC Mains, one must ensure that the grid
Voltage meets the equipment’s settings.
Never expose the equipment to rain, moisture, or direct sunlight in order to avoiding risk of
fire or electric shock.
2798844 – 275VAC SURGE PROTECTION VARISTOR
2817990 – 260VAC SURGE PROTECTION SPARKLER
2807586 – 150VAC SURGE PROTECTION VARISTOR
Sparkover Changing
RED :
Fault
About AC MAINS TYPE, see Section 8 –
Attachments, USA AC Mains Types for E-
PHASE
2807586
150 VAC SURGE
PROTECTION VARISTOR
Ground Ground
B 240
PHASE
PHASE
PHASE
PHASE
2798844
275 VAC SURGE
PROTECTION VARISTOR
Ground Ground
M 208
NEUTRAL
NEUTRAL
PHASE
2817990
260 VAC SURGE
PROTECTION SPARKLER