LR2D3557 SQUARE D, LR2D3557 Datasheet
LR2D3557
Manufacturer Part Number
LR2D3557
Description
BIMETALLIC OVERLOAD RELAY 575VAC 50A IEC
Manufacturer
SQUARE D
Datasheet
1.LR2D3557.pdf
(2 pages)
Product data sheet
Characteristics
Complementary
Mar 30, 2012
Network frequency
Mounting support
Tripping threshold
[Ith] conventional free air thermal current
Permissible current
[Ue] rated operational voltage
[Uimp] rated impulse withstand voltage
Phase failure sensitivity
Temperature compensation
Connections - terminals
Tightening torque
Height
Width
Depth
Product weight
Quantity per set
LR2D3557
TeSys D thermal overload relays - 37...50 A -
class 20
Main
Range of product
Product or component
type
Device short name
Relay application
Product compatibility
Network type
Overload tripping class
Thermal protection ad-
justment range
[Ui] rated insulation
voltage
0...400 Hz
Under contactor
1.14 +/- 0.06 Ir conforming to IEC 60947-4-1
5 A for signalling circuit
0.06 A at 440 V DC-13 for power circuit
0.72 A at 500 V AC-15 for power circuit
690 V
6 kV
Tripping current 130 % of Ir on two phase, the last one at 0
-30...60 °C
Control circuit: screw clamp terminals 2 cable(s) 1...2.5 mm² - cable stiffness: sol-
id - without cable end
Control circuit: screw clamp terminals 2 cable(s) 1...2.5 mm² - cable stiffness:
flexible - with cable end
Control circuit: screw clamp terminals 2 cable(s) 1...2.5 mm² - cable stiffness:
flexible - without cable end
Power circuit: screw clamp terminals 1 cable(s) 4...35 mm² - cable stiffness: solid
- without cable end
Power circuit: screw clamp terminals 1 cable(s) 4...35 mm² - cable stiffness: flexi-
ble - with cable end
Power circuit: screw clamp terminals 1 cable(s) 4...35 mm² - cable stiffness: flexi-
ble - without cable end
Power circuit: 9 N.m - on screw clamp terminals
Control circuit: 1.7 N.m - on screw clamp terminals
100 mm
75 mm
121 mm
0.535 kg
Set of 10
TeSys D thermal overload relays
Differential thermal overload relay
LR2D
Motor protection
LC1D80
LC1D95
AC
DC
Class 20 conforming to IEC 60947-4-1
37...50 A
690 V power circuit conforming to IEC 60947-4-1
600 V power circuit conforming to UL
600 V power circuit conforming to CSA
1
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LR2D3557 Summary of contents
Page 1
... Phase failure sensitivity Temperature compensation Connections - terminals Tightening torque Height Width Depth Product weight Quantity per set Mar 30, 2012 LR2D3557 TeSys D thermal overload relays - 37... class 20 Main Range of product TeSys D thermal overload relays Product or component Differential thermal overload relay type Device short name ...
Page 2
Environment Standards Product certifications Protective treatment IP degree of protection Ambient air temperature for operation Ambient air temperature for storage Fire resistance Flame retardance Mechanical robustness Dielectric strength 2 CSA C22 60947-4-1 EN 60947-5-1 IEC 60947-4-1 IEC ...