Hitachi J300U Series instruction manual General Caution, To be grounded or shielded wire

CAUTION

Power source

EMI filter

R1 R2

S1 S2

T1 T2

Inverter			Motor	Power
L1(L1)	U	(T1) U
				source
L2(L2)	V	(T2) V

Noise

➤

Inverter

Motor

Terminal EMI

forfilter grounding

Remote operator ➤

➤

Piping

Ground the frame.

Noise

(to be grounded) or shielded wire

Completely ground the shield made of metal screen, enclosed panel, etc. with as short a wire as possible.

*EFFECTS OF DISTRIBUTOR LINES ON INVERTERS

In the cases below involving a general-purpose inverter, a large peak current flows on the power supply side, sometimes destroying the converter module. Where such situations are foreseen, or the paired equipment must be highly reliable, install an AC reactor between the power supply and the inverter.

(A)The unbalance factor of the power supply is 3% or higher.

(B)The power supply capacity is at least 10 times greater than the inverter capacity (and the power supply capacity, 500 kVA or more).

(C)Abrupt power supply changes are expected. Examples:

(1)Several inverters are interconnected with a short bus.

(2)A thyristor converter and an inverter are interconnected with a short bus.

(3)An installed phase advance capacitor opens and closes.

In cases (A), (B) or (C), we recommend installing an AC reactor of 3% (in a voltage drop at rated current) with respect to the supply voltage on the power supply side.

*When occurring an EEPROM error ( ), be sure to confirm the setting value again.

*When setting b contact to the reverse command ([REV] terminal), the inverter state automatically. Do not set to b contact.

GENERAL CAUTION

In all the illustrations in this manual, covers and safety devices are occasionally removed to describe the details. When the product is operated, make sure that the covers and safety devices are placed as they were specified originally and operate it according to the instruction manual.

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