Hitachi E-Compact Medium Power Series User Manual

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E-Compact Medium Power
6.5. AC Mains Protection Unit
The AC Protection Unit is responsible for the AC Power distribution and Equipment AC Power
protection.
Characteristics:
⇨ Surge Protection Device (SPD).
⇨ Circuit Breaker.
⇨ AC Line Input.
⇨ AC Mains Internal distribution.
⇨ AC Mains Available:
6.5.1. Sparkover - Phase Surge Protection Device (SPD).
It is a device that limits overvoltages in the mains by diverting the current line to 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, needing for its replacement:
Sparkover Changing
RED:
Fault
Warning
M208
1 Φ 190~240VAC
Neutral
GND
B240
2 Φ 190~240VAC
GND
T208 / T240
3 Φ 190~240VAC
GND
T380
3 Φ 190~240VAC
Neutral
GND
EC Medium Power – Rear View
Mains
Protection
Unit

Hitachi E-Compact Medium Power Series Specifications

General

Brand	Hitachi
Model	E-Compact Medium Power Series
Category	Transmitter
Language	English