Mitsubishi Electric FR-E800 Series Instruction Manual page 244

• For the terminal used for the THP signal output, set "8" (positive logic) or "108" (negative logic) in any parameter from
Pr.190 to Pr.196 (Output terminal function selection).
Electronic thermal
relay function
operation level
Electronic thermal O/L
(THP)
relay alarm
OFF
NOTE
• Changing the terminal assignment using Pr.190 to Pr.196 (Output terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
 External thermal relay input (OH signal, E.OHT)
Thermal relay protector
Inverter
Motor
U
V
M
W
OH
SD
External thermal relay input connection diagram
• The External thermal relay input (OH) signal is used when using the external thermal relay or the thermal protector built
into the motor to protect the motor from overheating.
• When the thermal relay is activated, the inverter output is shut off by the external thermal relay (E.OHT).
• To input the OH signal, set "7" in any parameter from Pr.178 to Pr.189 (Input terminal function selection) to assign the
function.
• Vector-control-dedicated motors (SF-V5RU) are equipped with thermal protectors.
Inverter SF-V5RU
∗1
PC
2W1kΩ G1
OH
G2
SD
Connecting the SF-V5RU thermal protector
*1 Connect the recommended 2 W 1 kΩ resistor between terminals PC and OH. (Refer to the Instruction Manual (Connection).)
NOTE
• Changing the terminal assignment using Pr.178 to Pr.189 (Input terminal function selection) may affect the other functions.
Set parameters after confirming the function of each terminal.
 Overheat protection to match the characteristic of the motor (Pr.600 to
Pr.604, Pr.692 to Pr.696)
• The activation level of the electronic thermal O/L relay can be varied to match the motor temperature characteristic.
• The electronic thermal O/L relay operation level can be set with the combination of three points (Pr.600, Pr.601), (Pr.602,
Pr.603), (Pr.604, Pr.9). Two or more points are required for setting.
100%
85%
ON
ON
Time
11. (H) Protective Function Parameters
11.1 Motor overheat protection (electronic thermal O/L relay)
11
12
13
14
15
16
17
18
19
20
243