Identification
7300A User Manual
1-2
Chapter 1 IDENTIFICATION
1.1. GENERAL PRESENTATION
7300A series power thyristor units are used to control the electrical power of three-phase
industrial loads of all types.
The load controlled may comprise high or low temperature coefficient resistive loads, short
wave infrared elements or transformer primaries.
Current ratings vary from 16 A to 160 A (per phase), at line-to-line voltages of 200 V to 500 V.
A 7300A series thyristor unit comprises three channels, controlled by thyristors.
Figure 1-1 General view of 7300A power thyristor unit from 16 to 40 A
GRF
DLF
CHK
A
ON
HEAT
SET
I
LIM
+
ALR
71 1a
72 1b
AUX1 16 230 17 18 0V
7300
A
EUROTHERM
PE
3/L2
4/T2
2/T1
1/L1
ε
5/L3
6/T3
Protective Earth
Terminal
Power Terminals
(supply side)
Power Terminals (load size)
Internal
power wiring
diagram
Control Terminal
Pinouts
Electonics
Power Supply
Firing request LED
DLF
Option:
Diagnostic Alarm
40 A / 500 V
EN 60947-4-3
VI
LIM
+
70
°
DLY
Control
Connector
Current Limitation
Option
DLF
Option:
Push button
Diagnostic Diagram
VICL
Option:
Power Control
XFMR
Option
:
Firing Delay
ADJ.C
AL
66 0VC 67
HRC
Current
Limitation
Option
GRF
Option:
Serious Alarm
I
LIM
Communication Option :
Transmission LEDs and
configuration microswitch
ON/
Dxch
Rx
Tx
ON
COM
B A
91 92
Aux2
GND 24V 0VS
15 19 20
