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LR3D21L | Class 20 Bimetal OLR 12 - 18A | Schneider Electric (Square D)
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Details for LR3D21L
Schneider Electric (Square D) LR3D21L: 12A-18A Class 20 Overload RelayThe Schneider Electric (Square D) LR3D21L is a Class 20 overload relay designed for protection in low voltage motor circuits. This relay features an adjustable trip setting from 12A to 18A, providing precise overload protection for motors within this current range. It effectively detects overloads and faults, interrupting the circuit to prevent damage to the motor and associated equipment.
The LR3D21L overload relay is constructed with high-quality materials, ensuring durability and reliable operation under demanding conditions. Its rugged design and compact size make it easy to mount and integrate into control panels and motor starters. This relay is suitable for use in various industrial and commercial applications, including motor control centers, pumps, fans, and compressors.
The Schneider Electric (Square D) LR3D21L Class 20 Overload Relay offers:
Precise overload protection: Adjustable trip setting from 12A to 18A
Robust construction: Durable design for reliable operation in demanding environments
Easy integration: Compact size for easy mounting in control panels and motor starters
Improved safety: Protects motors and equipment from damage caused by overloads and faults
our HVAC supply store is your go-to source for high-quality electrical components. We offer the best prices and fast shipping for your products! LR3D21L is a TeSys LRD thermal overload relay from Schneider Electric to be used with a TeSys D contactor. It protects motors 7.5kW@400V thanks to a thermal range 12-18A , a tripping class 20, for use with unbalanced loads. LR3D21L is a TeSys LRD thermal overload relay from Schneider Electric for direct mounting on TeSys D contactors. With a thermal setting range 12-18A and tripping class 20, it protects unbalanced loads and motors 7.5kW@400V. It provides manual test & reset buttons, automatic reset, trip auxiliary contact and flag indicator. Available worldwide, it is multi-standards certified (IEC, UL, CSA, CCC, EAC, Marine) and Green Premium compliant (RoHs/Reach). Thermal overload protection relay, bimetallic type, for use with unbalanced loads (non differential). Direct mounting on the bottom terminals of a Tesys contactor LC1D18-D38 to form a compact starter. Light and compact, 45mm wide. Temperature compensated for a good accuracy of the protection. Manual control with test & reset buttons, manual / automatic reset selector. Trip signaling with 1NO+1NC auxiliary contacts and trip flag indicator. Can be completed with terminal blocks for separate mounting (LAD7B, LAD96) and remote control devices (LAD703, LA7D03).
Specifications
- range
- TeSys
- product name
- TeSys LRD;TeSys Deca
- Product or Component Type
- Non differential thermal overload relay
- device short name
- LR3D
- relay application
- Motor protection
- Product Compatibility
- LC1D25;LC1D18;LC1D32;LC1D38
- network type
- AC;DC
- thermal overload class
- Class 20 IEC 60947-4-1
- thermal protection adjustment range
- 12…18 A
- [Ui] rated insulation voltage
- Power circuit 600 V CSA;Power circuit 600 V UL;Power circuit 690 V IEC 60947-4-1
- Network Frequency
- 0...400 Hz
- mounting support
- Plate;with specific accessories;Rail;with specific accessories;Under contactor
- tripping threshold
- 1.14 +/- 0.06 Ir IEC 60947-4-1
- auxiliary contact composition
- 1 NO + 1 NC
- [Ith] conventional free air thermal current
- 5 A signalling circuit
- permissible current
- 3 A 120 V AC-15 signalling circuit;0.22 A 125 V DC-13 signalling circuit
- [Ue] rated operational voltage
- 690 V AC 0...400 Hz power circuit IEC 60947-4-1
- associated fuse rating
- 4 A gG signalling circuit;4 A BS signalling circuit
- [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
- -4…140 °F (-20…60 °C)
- connections - terminals
- Control circuit screw clamp terminals 2 0.00…0.00 in² (1…2.5 mm²) flexible without cable end;Control circuit screw clamp terminals 2 0.00…0.00 in² (1…2.5 mm²) flexible with cable end;Control circuit screw clamp terminals 2 0.00…0.00 in² (1…2.5 mm²) solid without cable end;Power circuit screw clamp terminals 1 0.00…0.02 in² (1.5…10 mm²) flexible without cable end;Power circuit screw clamp terminals 1 0.00…0.01 in² (1…4 mm²) flexible with cable end;Power circuit screw clamp terminals 1 0.00…0.01 in² (1…6 mm²) solid without cable end
- tightening torque
- Control circuit 15.05 lbf.in (1.7 N.m) screw clamp terminals;Power circuit 15.05 lbf.in (1.7 N.m) screw clamp terminals
- Height
- 2.60 in (66 mm)
- Width
- 1.77 in (45 mm)
- Depth
- 2.99 in (76 mm)
- Net Weight
- 0.32 lb(US) (0.144 kg)
- climatic withstand
- IACS E10
- IP degree of protection
- IP20 conforming to IEC 60529
- ambient air temperature for operation
- -4…140 °F (-20…60 °C) without derating IEC 60947-4-1
- Ambient Air Temperature for Storage
- -76…158 °F (-60…70 °C)
- mechanical robustness
- Shocks15 Gn for 11 ms IEC 60068-2-7;Vibrations3 GN IEC 60068-2-6
- dielectric strength
- 1.89 kV 50 Hz IEC 60947-1
- Standards
- EN/IEC 60947-4-1;EN/IEC 60947-5-1;UL 60947-4-1;UL 60947-5-1;CSA C22.2 No 60947-4-1;CSA C22.2 No 60947-5-1;EN 50495
- Product Certifications
- IEC;UL;CSA;EAC;ABS;ATEX INERIS;UKCA
- Category
- 22347-CONTACTOR;D-LINE;OVERLOADS-NEW
- Discount Schedule
- I12
- GTIN
- 3606480609732
- Returnability
- Yes
- Country of origin
- TH
- Unit Type of Package 1
- PCE
- Number of Units in Package 1
- 1
- Package 1 Height
- 3.27 in (8.3 cm)
- Package 1 Width
- 2.83 in (7.2 cm)
- Package 1 Length
- 1.77 in (4.5 cm)
- Package 1 Weight
- 5.08 oz (144.0 g)
- Unit Type of Package 2
- S02
- Number of Units in Package 2
- 24
- Package 2 Height
- 15.75 in (40 cm)
- Package 2 Width
- 11.81 in (30 cm)
- Package 2 Length
- 5.91 in (15 cm)
- Package 2 Weight
- 10.24 lb(US) (4.645 kg)
- Unit Type of Package 3
- P12
- Number of Units in Package 3
- 768
- Package 3 Height
- 31.50 in (80 cm)
- Package 3 Width
- 47.24 in (120 cm)
- Package 3 Length
- 29.53 in (75 cm)
- Package 3 Weight
- 350.54 lb(US) (159 kg)
- Warranty
- 18 months
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