TeSys LRD thermal overload relays - 37...50 A - class 10A - LRD350
TeSys LRD thermal overload relay, 50A/690V, thermal setting range 37-50A, tripping class 10A, for protection of 3-phase motors 22kW@400V.
Differential device with phase failure and load unbalance detection.
It provides a thermal adjustement dial, a manual-automatic reset selector, a test selector for simulation of a tripping, reset and stop buttons, a flag indicator and 2 auxiliary contacts 1NO+1NC for fault signalling.
Settings are protected by a transparent cover lockable by sealing.
Connection by EverLink BTR screw terminals , it connects directly to the bottom terminals of 3-pole contactors LC1D40A-D80A.
Mounting on DIN rail or screw fixing, separated from the contactor, with use of a terminal block LAD96560 (to be ordered separately).
Multi standards certified (IEC, UL, CSA, CCC, EAC, Marine), Green Premium compliant (RoHs/Reach).
| Attribute | Value |
|---|---|
| SKU | LRD350 |
| product certifications | EAC, CCC, IEC, LROS (Lloyds register of shipping), CSA, UL, EU-RO MR, ATEX INERIS, DNV-GL, RMRS |
| ambient air temperature for storage | -60-70 °C |
| ambient air temperature for operation | -20-60 °C without derating conforming to IEC 60947-4-1 |
| product or component type | Relay Beban Lebih Termal |
| net weight | 0.375 kg |
| standards | EN/IEC 60947-5-1, UL 60947-4-1, CSA C22.2 No 60947-4-1, EN/IEC 60947-4-1, UL 60947-5-1, CSA C22.2 No 60947-5-1, EN 50495 |
| device short name | LRD |
| range | TeSys LR |
| product compatibility | LC1D40A, LC1D50A, LC1D65A |
| product name | TeSys LRD |
| mechanical robustness | shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7, vibrations: 4 gn conforming to IEC 60068-2-6 |
| [Ith] conventional free air thermal current | 5 A for signalling circuit |
| relay application | motor protection |
| permissible current | 0.95 A at 380 V AC-15 for signalling circuit, 0.06 A at 440 V DC-13 for signalling circuit |
| tripping threshold | 1.14 +/- 0.06 Ir conforming to IEC 60947-4-1 |
| network frequency | 0...400 Hz |
| connections - terminals | 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, power circuit: EverLink BTR screw connectors 1 cable(s) 1-35 mm² flexible without cable end, power circuit: EverLink BTR screw connectors 1 cable(s) 1-35 mm² flexible with cable end, power circuit: EverLink BTR screw connectors 1 cable(s) 1-35 mm² solid without cable end |
| height | 70 mm |
| mounting support | plate, with specific accessories, rail, with specific accessories, under contactor |
| compatibility code | LRD |
| width | 55 mm |
| depth | 123 mm |
| dielectric strength | 1.89 kV at 50 Hz conforming to IEC 60947-1 |
| IP degree of protection | IP20 conforming to IEC 60529 |
| network type | AC, DC |
| tightening torque | control circuit: 1.7 N.m - on screw clamp terminals, power circuit: 5 N.m - on EverLink BTR screw connectors |
| control type | red push-button: stop, blue push-button: reset |
| [Ue] rated operational voltage | 690 V AC 0...400 Hz for power circuit conforming to IEC 60947-4-1 |
| [Ui] rated insulation voltage | power circuit: 690 V conforming to IEC 60947-4-1, power circuit: 600 V conforming to CSA, power circuit: 600 V conforming to UL |
| auxiliary contact composition | 1 NO + 1 NC |
| associated fuse rating | 4 A gG for signalling circuit, 4 A BS for signalling circuit |
| flame retardance | V1 conforming to UL 94 |
| protective treatment | TH conforming to IEC 60068 |
| thermal protection adjustment range | 37-50 A |
| phase failure sensitivity | tripping current 130 % of Ir on two phase, the last one at 0 |
| thermal overload class | class 10A conforming to IEC 60947-4-1 |
| temperature compensation | -20-60 °C |
