Silicon carbide is a semiconductor material and has a much higher resistivity than metal resistance materials. The resistivity at ambient temperature is quite high, and decreases with increasing temperature to a minimum value of about 600-900°C; at element temperatures above 900°C the resistivity increases with increasing temperature. Therefore it is necessary to regulate the constant power with a feedback of V to VxI transfer. On three-phase loads with Silicon Carbide it is suggested to use a feedback in VxI to obtain a constant power regulation. This is necessary to compensate for changes in the resistance value with the temperature and age of the elements. The value at the end of their use is four times the initial value. CD Automation can control this type of resistors with REVO C or REVEX 1PH.

SIC Elements 1PH Connection

 

Products

REVEX 1PHREVO C 1PH
LOAD
Load Voltage480-600V480-600V-690V*
Current Range30:280A30:2100A
INPUT
4:20mAXX
0:10VXX
10K Pot.XX
FIRING
Phase AngleXX
FEED BACK | CONTROL
V to VxI transferXX
Use voltage reserve of 100%
OPTION
Fuses +  Fuse HolderO
30:40A
X
30:40A
Internal Fuse HolderO
>40A
X
cUL us or ULO
30:700A=cUL us; 800:2100A=UL
480V and 600V max only
COMMUNICATION/PROGRAM.
RS485 Modbus RTUXX
Profinet + Modbus TCP EthernetO
O
Config. Frontal KeypadOX
PC Win. ConfiguratorXX
REVO KP3 TerminalOO

X = Standard      O = Option

*690V is available from 60 up to 2100A

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