Main
Device short name
LT3SE
[uc] control circuit voltage
115 V AC 50/60 Hz
[ui] rated insulation voltage
Output control relay: 500 V AC
reset
Automatic reset
Complementary
[ue] rated operational voltage
250 V AC 50/60 Hz for output control relay
[ics] rated service breaking capacity
2 A at 24 V DC DC-13
3 A at 250 V AC AC-16
6 A at 120 V AC AC-16
[ith] conventional thermal current
5 A for output control relay
Control type
Automatic reset
Handle front plate colour
100 mm
Product or component type
Thermistor protection units
tightening torque
0.8 N.m
[uimp] rated impulse withstand voltage
2.5 kV
Connections - terminals
Power circuit: cage type connector 1 cable(s) 0.75…2.5 mm²flexible with cable end
Power circuit: cage type connector 1 cable(s) 0.75…2.5 mm²solid with cable end
Power circuit: cage type connector 1 cable(s) 1…2.5 mm²flexible without cable end
Power circuit: cage type connector 1 cable(s) 1…2.5 mm²solid without cable end
Power circuit: cage type connector 2 cable(s) 0.75…2.5 mm²flexible with cable end
Power circuit: cage type connector 2 cable(s) 0.75…2.5 mm²solid with cable end
Power circuit: cage type connector 2 cable(s) 1…2.5 mm²flexible without cable end
Power circuit: cage type connector 2 cable(s) 1…2.5 mm²solid without cable end
rated power in va
100 VA at 220 V - electrical durability: 500000 cycles
Condition of use
Connection of probes 400 m >1 mm²
Connection of probes 300 m >0.75 mm²
Contacts type and composition
1 NC single voltage
Control circuit voltage limits
0.85...1.1 Uc
width (w)
22.5 mm
probe interchangeability
Label mark A conforming to IEC 60034-11
Net weight
0.22 kg
number of probes
0…6
Hold-in power consumption in va
2.5 VA
Hold-in power consumption in w
1 W
depth
100 mm
resistance
1500…1650 Ohm reset
2700…3100 Ohm tripping
Maximum short circuit detection resistance
20 Ohm
input voltage
< 2.5 V (1500 Ohm) for probe
< 7.5 V (4000 Ohm) for probe conforming to IEC 60034-11
Signalling function
Without
Shock resistance
5 gn 11 ms conforming to IEC 60068-2-27
Environment
Ambient air temp for storage/transportation
-40…85 °C conforming to IEC 60068-2-2
-40…85 °C conforming to IEC 60068-2-2
ip degree of protection
IP20 conforming to IEC 60529
IP20 conforming to VDE 0106
operating altitude
<= 1500 m without derating in temperature
> 1500...3000 m with derating in temperature
Range of product
LT3
ambient air temperature for operation
-25…60 °C
electromagnetic compatibility
Resistance to electrostatic discharge level 3 conforming to IEC 61000-4-2
Resistance to fast transient level 3 conforming to IEC 61000-4-4
Surge resistance 1.2/50-8/20 level 4 conforming to IEC 61000-4-5
Susceptibility to electromagnetic fields level 3 conforming to IEC 61000-4-3
Immunity to microbreaks and voltage drops conforming to IEC 61000-4-11
standards
IEC 60947-8
IEC 60034-11
VDE 0660
vibration resistance
1 gn 25...150 Hz conforming to IEC 60068-2-6
2.5 gn 2...25 Hz conforming to IEC 60068-2-6