Motor Ptc Overheat Warning Level; Motor Ptc Overheat Reset Delta Level; Treatment Of The Motor Ptc Overheat - Delta Electronics AC Motor Drive VFD-E User Manual

Chapter 4 Parameters|
Refer to following calculation for protection level and warning level.
1. Protection level
Pr.07.14= V
2. Warning level
Pr.07.16= V
3. Definition:
V+10: voltage between +10V-ACM, Range 10.4~11.2VDC
RPTC1: motor PTC overheat protection level. Corresponding voltage level set in
Pr.07.14, RPTC2: motor PTC overheat warning level. Corresponding voltage level set
in Pr.07.15, 47kΩ: is AVI input impedance, R1: resistor-divider (recommended value:
1~20kΩ)
Take the standard PTC thermistor as example: if protection level is 1330Ω, the voltage
between +10V-ACM is 10.5V and resistor-divider R1 is 4.4kΩ. Refer to following calculation
for Pr.07.14 setting.
1330//47000=(1330*47000)/(1330+47000)=1293.4
10.5*1293.4/(4400+1293.4)=2.38(V) ≒2.4(V)
Therefore, Pr.07.14 should be set to 2.4.
07.15

Motor PTC Overheat Warning Level

Settings
07.16

Motor PTC Overheat Reset Delta Level

Settings
07.17

Treatment of the motor PTC Overheat

Settings
4-100
* (R //47K) / [R1+( R
+10 PTC1
* (R //47K) / [R1+( R
+10 PTC2
resistor value ( )
Ω
1330
550
0.1~10.0V
0.1~5.0V
0 Warn and RAMP to stop
1 Warn and COAST to stop
2 Warn and keep running
//47K)]
PTC1
//47K)]
PTC2
Tr
temperature ( )
Tr-5℃ Tr+5℃
Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11
℃
Unit: 0.1
Factory Setting: 1.2
Unit: 0.1
Factory Setting: 0.6
Factory Setting: 0