Delta CP2000 Series, User Manual

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Chapter 12 Description of Parameter Settings

CP2000
12.1-06-9

Electronic Thermal Relay Action Time 1 (Motor 1)

Electronic Thermal Relay Action Time 2 (Motor 2)
Default: 60.0
Settings 30.0–600.0 sec.
 Set the parameter to 150% of motor rated current and use with the setting of Pr.06-14 and
Pr.06-28 to prevent motor damage due to overheating. When it reaches the setting, the drive
displays “EoL1 / EoL2”, and the motor free runs to stop.
 Use this parameter to set the action time of electronic thermal relay. It works based on the I 2 t
characteristic curve of electronic thermal relay, the output frequency and current of the drive, and
the operation time to prevent motor from overheating.
 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 06-28.
2. Pr.06-13 or Pr.06-27 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 06-28
3. If the Pr.05-01 is not set, the default is 90% of Pr.00-01 rated current of the drive.
 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 following chart: (The motor cooling curve with
shaft-fixed fan and motor cooling curve with independent fan F = 50 Hz are the same one.)