Schneider-Electric
 
LRD3357 picture- web-product-data-sheet
LRD3357
TeSys LRD thermal overload relays - 37...50 A - class 10A
Schneider Electric
Characteristics
Main
Range TeSys
Product name TeSys LRD
Product or component type Differential thermal overload relay
Device short name LRD
Relay application Motor protection
Product compatibility LC1D95
LC1D80
Network type DC
AC
Thermal protection adjustment range 37…50 A
[Ui] rated insulation voltage Power circuit: 1000 V conforming to IEC 60947-4-1
Power circuit: 600 V conforming to CSA
Power circuit: 600 V conforming to UL
Complementary
Network frequency 0...400 Hz
Mounting support Plate, with specific accessories
Rail, with specific accessories
Under contactor
Tripping threshold 1.14 +/- 0.06 Ir conforming to IEC 60947-4-1
[Ith] conventional free air thermal current 5 A for signalling circuit
Permissible current 0.72 A at 500 V AC-15 for signalling circuit
0.06 A at 440 V DC-13 for signalling circuit
[Ue] rated operational voltage 690 V AC 0...400 Hz
[Uimp] rated impulse withstand voltage 6 kV
Phase failure sensitivity Tripping current 130 % of Ir on two phase, the last one at 0
Control type Red push-button: stop
Blue push-button: reset
Temperature compensation -20…60 °C
Connections - terminals Power circuit: screw clamp terminals 1 cable(s) 4…35 mm² flexible without cable end
Power circuit: screw clamp terminals 1 cable(s) 4…35 mm² flexible with cable end
Power circuit: screw clamp terminals 1 cable(s) 4…35 mm² solid without cable end
Control circuit: screw clamp terminals 2 cable(s) 1…2.5 mm² flexible without cable end
Control circuit: screw clamp terminals 2 cable(s) 1…2.5 mm² flexible with cable end
Control circuit: screw clamp terminals 2 cable(s) 1…2.5 mm² solid without cable end
Tightening torque Control circuit: 1.7 N.m - on screw clamp terminals
Power circuit: 9 N.m - on screw clamp terminals
Height 123 mm
Width 75 mm
Depth 121 mm
Net weight 0.51 kg
Environment
Protective treatment TH conforming to IEC 60068
IP degree of protection IP20 conforming to IEC 60529
Ambient air temperature for operation -20…60 °C without derating conforming to IEC 60947-4-1
Ambient air temperature for storage -60…70 °C
Flame retardance V1 conforming to UL 94
Mechanical robustness Vibrations: 6 Gn conforming to IEC 60068-2-6
Shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7
Dielectric strength 6 kV at 50 Hz conforming to IEC 60255-5
Standards CSA C22.2 No 14
EN 60947-4-1
IEC 60947-4-1
IEC 60947-5-1
UL 508
ATEX D 94/9/CE
EN 60947-5-1
Product certifications GL
DNV
GOST
RINA
LROS (Lloyds register of shipping)
CSA
ATEX INERIS
BV
UL
CCC
Packing Units
Unit Type of Package 1 PCE
Number of Units in Package 1 1
Package 1 Weight 493 g
Package 1 Height 8 cm
Package 1 width 8.7 cm
Package 1 Length 12 cm
Offer Sustainability
Sustainable offer status Green Premium product
REACh free of SVHC Yes
EU RoHS Directive Compliant
print EU RoHS Declaration
Toxic heavy metal free Yes
Mercury free Yes
RoHS exemption information
print Yes
China RoHS Regulation
print China RoHS declaration
Environmental Disclosure
print Product Environmental Profile
Circularity Profile
print End of Life Information
Contractual warranty
Warranty 18 months