Hitachi SJ100 Large areas. Consequently, Safety measures, Cables. This influence you can minimize

HITACHI INVERTER

SJ100 SERIES

QUICK REFERENCE GUIDE (Part 2/2)

Single phase input 200V class

Three phase input 200V class

Three phase input 400V class

CE-EMC Installation

This instruction describes the electromagnetically compatible setup of your drive system.

1.	As an enduser you must ensure that the HF impedance between
	frequency inverter, filter and ground is as small as possible.
	∙ See to it that the connections are metallic and have the largest
	possible areas (zink-plated mounting plates)
2.	Conductor loops act like antennas, especially when they encompass
	large areas. Consequently:
	∙ Avoid unnecessary conductor loops
	∙ Avoid parallel arrangement of „clean“ and interference-prone
	conductors
3.	Lay the motor cable and all analog and digital contol lines shielded.
	∙ You should allow the effective shield area of these lines to remain as
	large as possible; i.e., do not move the shield further away than
	absolutely necessary.
	∙ With compact systems, if for example the frequency inverter is
	communicating with the steering unit, in the same control cabinet
	connected at the same PE-potential, the screen of control lines should
	be put on, on both sides with PE. With branch systems, if for example
	the communicating steering unit is not in the same control cabinet and
	there is a distance between the systems, we recommend to put on the
	screen of control lines only on the side of the frequency inverter. If it is
	possible, direct in the cable entry section of the steering unit. The
	screen of Motor cabels always must be put on, on both sides with PE.
	∙ The large area contact between shield and PE-potential you can
	realise with a metal PG screw connection or a metallic mounting clip.
	∙ Use only copper mesh cable (CY) with 85% coverage

smallest if they intersect at an angle of 90°. Cables susceptible to interference should therefore only intersect motor cables, intermediate circuit cables, or the wiring of a rheostat at right angles and never be laid parallel to them over larger distances.

5.The distance between an interference source and an interference sink (interference-threatened device) essentially determines the effects of the emitted interference on the interference sink.

∙You should use only interference-free devices and maintain a minimum distance of 0.25 m from the drive.

6.Safety measures

∙Ensure that the protective conductor terminal (PE) of the filter is properly connected with the protective conductor terminal of the frequency inverter. An HF ground connection via metal contact between the housings of the filter and the frequency inverter, or solely via cable shield, is not permitted as protective conductor connection. The filter must be solidly and permanently connected with the ground potential so as to preclude the danger of electric shock upon touching the filter if a fault occurs. You can achieve this by:

-connecting it with a grounding conductor of at least 10 mm2;

-connecting a second grounding conductor, connected with a separate grounding terminal, parallel to the protective conductor (The cross section of each single protective conductor terminal must be designed for the required nominal load)

HITACHI POWER

RUN	55.0	Hz
PRG		A
RUN	STOP
	RESET

SJ100

WARNING

HAZARD OF PERSONAL INJURY OR ELECTRIC SHOCK

Disconnect incoming power and wait

5 minutes before opening front case.

PE connection

Wiring example: Set value 4..20mA and thermistor				24VDC	Commonfor signalsinput
Motor thermistor	AT	Reverse	Forward
(PTC)

L	6	5	4	3		2	1	P24
	H	O	OI	L	FM	CM2	12	11
Set value
(4...20mA)

Frequency meter (0..10V, 1mA)

A 01 = 01 (Frequency set value on input O or OI) A 02 = 01 (Start signal on FW/RV) F 02 = 10 (acceleration time 10 sec.) F 03 = 10 (deceleration time 10 sec.)

C 01	= 00	(FW: Start forward run via input 1)
C 02	= 01	(RV: Start reverse run via input 2)
C 03	= 16	(AT: Use current input 4-20mA for set value) C 05 = 19 (PTC on input 5)

The inverter can now be started via input 1 (forward run) or input 2 (reverse run). If the inputs RV and FW are both closed, the inverter is stopped. If input AT is configured as normally open contact and is closed, current input on OI is used for set value.

Wiring example: Fixed set values; FA1 output and RUN output

Frequencymeter 1mA)10V,(0..

CF2

CF1

AT

Reverse

Forward

24VDC

Commonfor

inputsignals

L

6

5

4

3

2

1

P24

H

O

OI

L

FM

CM2

12

11

RUN	FA1
	+24V

Parameters for functions A 01, A 02, F 02, F 03, C 01, C 02, and C 03 are set exactly the same as in the example above. Additionally, C 04 is set to 02 (CF1) and C 05 is set to 03 (CF2). Fixed frequency set values are set via functions A 21, A 22, and A 23 using parame- ters 0 to 360 (= frequency 0 to 360Hz). The inverter can now be started via input 1 (FW) or input 2 (RV). If the inputs RV and FW are both closed, the inverter is stopped. If none of the digital inputs CF1 or CF2 is closed, frequency set value can be set using analog inputs O/OI.

Application example: Flow control

A flow control circuit is to be realized using the SJ100 inverter built in PID control.

Flow rate	+	fcur	M
set value		-
Qset
		Flow rate current value Qcur

Set value is given in fixed intervals: 100, 200, 300l/h. The current value is input by a sensor (0- 500l/h = 0-10V). When the difference is greater than 20% a warning is output. The frequency must not fall below 10 Hz. The set value and current value are displayed as flow rate in l/h (300l/h = 100% = 50Hz maximum frequency).

∙ The shielding should not be interrupted at any point in the cable. If

the use of reactors, contactors, terminals or safety switches in the motor

output is necessary, the unshielded section should be kept as small as

possible.

∙ Some motors have a rubber gasket between terminal box and motor

A 01	= 01 (fixed set values)	0-300 l/h
A 21	= 100 l/h (=33%)	= 0-100%)
A 22	= 200 l/h (=66%)
A 23	= 300 l/h (=100%)
		+

A 75 = 3.00
		F 01
	P
	A 72		+

value to 10Hz min.

housing. Very often, the terminal boxes, and particularly the threads for

the metal PG screw connections, are painted. Make sure there is always

a good metallic connection between the shielding of the motor cable,

the metal PG screw connection, the terminal box and the motor

housing, and carefully remove this paint if necessary.

4. Very frequently, interference is coupled in through installation

cables. This influence you can minimize:

∙

A 76 = 01

[PID current value at terminals (O-L)]

0 – 10V = 0 – 500 l/h

		0-300 l/h
10V		= 0-6V	-
	= 0-100%)
6V-
0-

A 14 = 60% set value adjustment

I+

A 73

D	+
A 74
	Display
	d 04

A75 = 3.00

Frequency set 0-100% =50Hz; limited

Lay interfering cables separately, a minimum of 0.25 m from cables

susceptible to interference.A particularly critical point is laying cables

parallel over larger distances. If two cables intersect, the interference is

Figure: Hitachi frequency inverter with footprint filter

In order to display the correct value, A 75 is set to 3.00 so that a set value of 100% corres- ponds to a flow rate of 300l/h. In order to match the current value input (0-500l/h) to the set value input (0-300l/h) the current value must be adjusted with parameters A 11 to A 14, i.e. A 14 must be set to 60% so that 300l/h process value corresponds to 100% current value.

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