Thermal Overload Relay Engineering Guide
A senior-engineer guide to thermal overload relays: bimetallic vs electronic construction, trip classes, FLC dial setting, star-delta sizing, phase-loss and ambient compensation, reset modes,...
- Part number
- LRE489
- Model no
- LRE
- CE
- CCC
- EAC
- CB Scheme
Easy TeSys ProtectSchneider Electric LRE489 Easy TeSys Protect Thermal Overload Relay 394-630 A Class 10A Relay
Easy TeSys Protect thermal overload relay, 394-630 A, class 10A, for EasyPact TVS.
Description
About the LRE
About the LRE
The Schneider Electric LRE489 is an Easy TeSys Protect differential thermal overload relay for EasyPact TVS contactors (LC1E500...630), adjustable over 394-630 A with a class 10A trip curve, protecting 3-phase motors from 250 to 355 kW at 400 V with phase-unbalance detection and a 1NO+1NC trip contact.
Certifications & Standards
- CB Scheme
- CCC
- CE
- EAC
- IEC 60947-1
- IEC 60947-4-1
- IEC 60947-5-1
- GB/T 14048.1
Selection Notes
Set the 394-630 A dial to the motor's actual full-load current for the from 250 to 355 kW range at 400 V; the recommended 1000 A gG / 630 A aM short-circuit backup must be sized before installation since this relay, like the GV2 L and GV3 L circuit-breaker combinations it is designed alongside, has no internal short-circuit withstand rating of its own. Differential (phase-unbalance) detection trips the relay on a single-phasing fault ahead of the class 10A thermal curve, and the 1NO+1NC trip contact wires directly into the EasyPact TVS contactor's control circuit for automatic disconnection.
Specification
Full specification
Main 6
| Range | Easy TeSys |
|---|---|
| Range of product | Easy TeSys Protect |
| Product or component type | Differential thermal overload relay |
| Device short name | LRE |
| Relay application | Motor protection |
| Phase failure sensitivity | Tripping current 130 % of Ir on two phase, the last one at 0 conforming to IEC 60947-4-1 |
Complementary 25
| Product compatibility | LC1E500...630 |
|---|---|
| Network type | AC |
| Network frequency | 50...60 Hz |
| Mounting support | Under contactor, Plate |
| Thermal overload class | Class 10A conforming to IEC 60947-4-1 |
| Signalling function | Relay trip indicator |
| Thermal protection adjustment range | 394…630 A |
| Tripping threshold | 1.14 +/- 0.06 Ir conforming to IEC 60947-4-1 |
| Mechanical robustness | Shocks: 6 Gn for 11 ms conforming to IEC 60068-2-7, Vibrations: 3 GN conforming to IEC 60068-2-6 |
| Auxiliary contact composition | 1 NO + 1 NC |
| [Ith] conventional free air thermal current | 5 A for signalling circuit |
| [Ue] rated operational voltage | <= 690 V AC |
| Associated fuse rating | 1000 A gG for power circuit, 630 A aM for power circuit, 5 A gG for signalling circuit |
| [Ui] rated insulation voltage | 690 V conforming to IEC 60947-4-1 |
| [Uimp] rated impulse withstand voltage | 6 kV |
| Local signalling | Trip indicator |
| Control type | Push-button red stop:, Push-button green reset: |
| Temperature compensation | -20…60 °C |
| Connection pitch | 80 mm |
| Connections - terminals | Signalling circuit: screw clamp terminals 2 1…2.5 mm² - cable stiffness: flexible without cable end, Signalling circuit: screw clamp terminals 2 1…2.5 mm² - cable stiffness: flexible with cable end, Signalling circuit: screw clamp terminals 2 1…2.5 mm² - cable stiffness: solid without cable end, Power circuit: lugs, Power circuit: bars - busbar cross section: 6 x 40 mm |
| Recommended tightening torque | Power circuit: 58 N.m - on bars M12, Power circuit: 58 N.m - on lugs M12, Signalling circuit: 1.7 N.m - on screw clamp terminals |
| Height | 150 mm |
| Width | 242 mm |
| Depth | 148 mm |
| Net weight | 3.9 kg |
Environment 9
| Standards | EN/IEC 60947-1, EN/IEC 60947-4-1, EN/IEC 60947-5-1, GB/T 14048.1, GB/T 14048.4, GB/T 14048.5, EN/IEC 60335-1:Clause 30.2, EN/IEC 60335-2-40:Annex JJ |
|---|---|
| Product certifications | CB Scheme, CCC, CE, EAC |
| Protective treatment | TH conforming to IEC 60068 |
| IP degree of protection | IP00 conforming to IEC 60529 |
| Ambient air temperature for operation | -20…60 °C without derating conforming to IEC 60947-4-1, -20…70 °C with derating |
| Ambient air temperature for storage | -60…80 °C |
| Fire resistance | 850 °C conforming to IEC 60068-2-1 |
| Dielectric strength | 6 kV at 50 Hz conforming to IEC 60255-5 |
| Electromagnetic compatibility | Surge withstand: 6 kV conforming to IEC 60801-5 |
Show all 58 specifications ↓ Show less ↑18 more values in Identification, Contractual warranty, Logistics.
Identification 7
| Part number | LRE489 |
|---|---|
| Type designation | LRE |
| Brand | Schneider Electric |
| Condition | New, factory sealed |
| Source | Schneider Electric and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
Contractual warranty 1
| Warranty (in months) | 18 |
|---|
Logistics 10
| Unit Type of Package 1 | PCE |
|---|---|
| Number of Units in Package 1 | 1 |
| Package 1 Height | 24.2 cm |
| Package 1 Width | 15 cm |
| Package 1 Length | 14.8 cm |
| Package 1 Weight | 4.4 kg |
| Shipping weight | 3.9 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 30 Oct 2026
Documents
Documents for LRE489
No documents are on file for this part yet.
Ask us for the datasheet
Certifications
Certifications and standards
- CE
- CCC
- EAC
- CB Scheme
- EN/IEC 60947-1
- EN/IEC 60947-4-1
- EN/IEC 60947-5-1
- GB/T 14048.1
- GB/T 14048.4
- GB/T 14048.5
- EN/IEC 60335-1:Clause 30.2
- EN/IEC 60335-2-40:Annex JJ
Quick answers
Questions about the LRE
What is the rated current of LRE?
The rated current of LRE is 630 A.
Which supply voltage is LRE rated for?
The rated operational voltage of LRE is 690 V AC.
What is the HS code of LRE for customs?
The tariff (HS) code on file for LRE is 85364900.
Where does LRE ship from, and how fast?
LRE ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
Guides
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Reviews
Customer reviews
Series
Schneider Electric Easy TeSys Protect
- Brand
- Schneider Electric
- Series
- Easy TeSys Protect
