ST-120-3
7
4
SE-E1 and SE-E3
SE-E1 and SE-E3 are protection devices for extended
voltage and frequency ranges as well as for additional
monitoring functions (Signal Evaluation - Enhanced).
The protection device SE-E3 has been developed for
the motor voltage range of 600 V .. 690 V / 3 / 50
and 60 Hz.
• Are used for:
– CSH and CSW series. Connection, see chapter
Schematic wiring diagrams, page 9.
– HS.53 series. Connection, see chapter Schematic
– HS.85 series. Connection, see chapter Schematic
• Fixation options:
– Can be fitted on a top hat rail.
– Can be fixed with screws.
• PTC control circuit:
Sensor type:
– Thermistors according to DIN 44081/82
Thermistor type:
1 .. 9 in series R
25
total < 1.8 kΩ
Break point:
Relay off > 11.4 kΩ ±20%
Relay on > 2.95 kΩ ±20%
Electrical and technical data, see table 3, page 6.
4.1
Monitoring functions SE-E1 and SE-E3
Connect the SE-E1 and SE-E3 in accordance with the
schematic wiring diagrams, see chapter Schematic wir-
ing diagrams, page 9.
!
!
NOTICE
Potential failure of the compressor protection
device and the motor due to improper connec-
tion and/or faulty operation!
The terminals M1-M2 or T1-T2 on the com-
pressor and 1-2 on the protection device must
not come into contact with the control voltage or
operating voltage!
Temperature monitoring
SE-E1 and SE-E3 lock immediately when the preset
motor, discharge gas or oil temperatures are exceeded.
The respective PTC temperature sensors must be con-
nected in series.
Rotation direction monitoring
SE-E1 and SE-E3 monitor the rotation direction within
the first 5 seconds after the compressor start (operation
recognition). If the compressor starts with the wrong ro-
tation direction, SE-E1 and SE-E3 lock immediately.
Phase failure monitoring
In the event of a phase failure within the first 5 seconds
after the compressor start, SE-E1 and SE-E3 interrupt
immediately the relay contact in the safety chain and
close it again after 6 minutes. Moreover, SE-E1 and
SE-E3 lock after:
• 3 phase failures within 18 minutes and
• 10 phase failures within 24 hours.
Locked / reset
SE-E1 and SE-E3 locked: The safety chain (11/14) is
interrupted, the lamp H1 is lit (signal contact 12) and in-
dicates the fault.
To reset: Interrupt the voltage supply for at least 5
seconds. Let the compressor cool down and reset it
manually.
