LT-S-(L) Technical manual
automatically reset.
The motor phase monitoring function will activated after 1 s of motor start and is
continuously monitored for 5 s. Abnormal motor phase or motor phase loss will
cause the protection module to open and lock.
In order to avoid tripping due to reversal after the compressor is stopped, the
phase monitoring function is only maintained for 20 seconds after the motor is
stopped.
LED (Light Emitting Diode) (Red/Green/Orange) displays its working
information.
The motor protection module cannot be used for variable frequency drives.
A short circuit in the PTC can cause a lock, and a short-term cycle can cause a
reset delay.
The delay should be reset and the module reset after the temperature is reduced or
the error is eliminated; then restart the compressor .
This module must be assembled and maintained by a professional electrician. Module connection
electrical equipment and cooling devices should have European or national standards. The connection
between the junction box and the temperature sensor must be insulated..
Technical Parameters:
Project
Technical Parameters
Project
Technical Parameters
Supply voltage
AC 50/60HZ 115/240V±10% 3VA
System
PTC
short
circuit monitoring
Usually <30Ω
Motor voltage
3 AC 50/60Hz 200/690V ±10%
Exceeding frequency
Not support
— sensor type
— R25
，
all
—
maximum
connection
length
Optional 1-2 AMS sensors in series, 1-9
PTC, series standard according to DIN
44081 and DIN 44082
<1.8KΩ
30M
— Motor static trip
1 time /24h
2 times /24h
3 times /24h
— On-off level
— Wrong phase
— Lost phase
Cancel lock or reset
delay
5min±1min
60min±12min
Locked up
5min±1min
Locked up
Locked up
Ambient
temperature
-30…70
℃
Maximum
switching
frequency
Switch 3 times in 30
seconds
Phase monitoring
-
Phase
sequence
- Lost phase
- Inactivation
Activated after 1s of motor start,
continuous monitoring for 5s
Activated 1 second after of motor start,
monitoring until shutdown
About 20 seconds after the motor stopped
Delay reset relay
—power supply
—Mechanical life
AC 240V 2.5A C300 at
least AC/DC 24V 20mA
1
million
switching
cycles
Signal light flash
：
The signal display is quick and easy to access; the light signal consists of
periodic red and orange flashes; the current light flash status depends on the number
