Delta C2000 Series User Manual page 500

 The action of electronic thermal relay depends on the setting for Pr. 06-13 and Pr. 06-27.
1. Pr. 06-13 or Pr. 06-27 set to 0 (using inverter motor):
When the output current of motor drive is higher than 150% of motor rated current (refer to the
motor cooling curve with independent fan), motor drive starts to count the time. The electronic
thermal relay acts when the accumulated time exceeds Pr. 06-14 or Pr. 06-28.
2. Pr. 06-13 or Pr. 06-27 is set to 1 (using standard motor):
When the output current of the drive is higher than 150% of the motor rated current (refer to
the motor cooling curve with shaft-fixed fan), the drive starts to count the time. The electronic
thermal relay acts when the accumulated time exceeds Pr. 06-14 or Pr. 06-28.
3. If the motor's rated current (Pr. 05-01) is not set, then set 90% of the drive's rated current (Pr.
00-01) as the default value of this parameter.
 The actual electronic thermal relay action time adjusts according to the drive output current
(shown as the motor loading rate %). The action time is short when the current is high, and the
action time is long when the current is low. Refer to the following chart: (The motor cooling curve
with shaft-fixed fan and motor cooling curve with independent fan F = 50 Hz are the same one.)
Temperature Level Over-heat (oH) Warning

Settings
 If Pr. 06-15 is set to 110ºC, when the temperature reaches 110ºC, the drive stops with an IGBT
over-heat fault.
 For Frame C and above, when IGBT temperature is above Pr. 06-15 minus 15ºC, the cooling fan
enhances performance to 100%; however, when IGBT temperature is below 35ºC of Pr. 06-15
and the temperature of CAP is below 10ºC of capacitor oH warning level (Pr. 06-51), the cooling
fan resets. The temperature 35ºC is the criterion if Pr. 06-15 is set below 35ºC.
0.0–110.0ºC
12.1-06-8
Chapter 12 Description of Parameter SettingsC2000
Default: 105.0