Terms & Conditions
Locations
TeSys LR97D electronic overcurrent relay, 25A/690V, to be supplied with 100-120V AC, for protection of motors with a rated current 5-21A. It provides 3 dials to adjust the protection, LOAD (5-25A) for the overcurrent level, O-TIME (0.3-10sec) for the acceptable duration of the overcurrent, D-TIME (0.5-30sec) for the starting duration. In addition, the device trips when the current is higher than 3 x LOAD during more than 0.5sec in steady state and if there is a missing phase during more than 3sec. The settings include selectors for 1-phase/3-phase motors and manual/automatic reset, and the device has a reset button, a test/stop button, 2 LED indicators (Run/Trip), 2 auxiliary contacts 1NO/NC for fault signalling. Settings can be locked by sealing the transparent cover. For direct attachement to the bottom terminals of a 3-pole contactor LC1D09-D38, with screw clamp terminals on bottom, the separate mounting from the contactor is possible using the terminal block LAD7B106 (to be ordered separately). Multi-standards certified (IEC, UL, CSA, CCC, EAC), compliant RoHs/Reach.
Products specifications
| Attribute name | Attribute value |
|---|---|
| Main | |
| Device short name | LR97 |
| Product compatibility | LC1D09...D38 |
| Quantity per set | set of 10 |
| [Us] rated supply voltage | 100...120 V AC |
| Range | TeSys |
| Product name | TeSys D |
| Product or component type | electronic overcurrent relay |
| Relay application | sensitivity to phase failure, overload Imax > Isetting, locked rotor, mechanical jamming I > 3 x Isetting |
| Network type | AC |
| Thermal protection adjustment range | 5-25 A |
| [Ue] rated operational voltage | 690 V AC 50/60 Hz for power circuit conforming to IEC 60947-4-1, 600 V AC 50/60 Hz for power circuit conforming to UL, 600 V AC 50/60 Hz for power circuit conforming to CSA |
| Complementary | |
| Maximum power | 70 VA at 24 V AC conforming to IEC 60947, 360 VA at 220 V AC conforming to IEC 60947, 360 VA at 110 V AC conforming to IEC 60947, 140 VA at 48 V AC conforming to IEC 60947, 55 W at 48 V DC conforming to IEC 60947, 55 W at 24 V DC conforming to IEC 60947, 28 W at 220 V DC conforming to IEC 60947, 28 W at 110 V DC conforming to IEC 60947 |
| Depth | 67.5 mm |
| Width | 45 mm |
| Compatibility code | LR97 |
| Mounting support | rail, direct on contactor |
| Tripping threshold | 5...21 A |
| Surge withstand | 6 kV conforming to IEC 61000-4-5 |
| Contacts type and composition | 1 C/O |
| [Ui] rated insulation voltage | power circuit: 690 V conforming to IEC 60947-4-1, power circuit: 600 V conforming to UL, power circuit: 600 V conforming to CSA |
| [Uimp] rated impulse withstand voltage | 6 kV |
| Connections - terminals | control circuit: lug-clamp 1 x 1-25 mm²flexible with cable end, control circuit: cable 2 x 1-25 mm²flexible without cable end, control circuit: cable 2 x 1-25 mm²flexible with cable end, power circuit: lug-clamp 1 x 1.5-10 mm²flexible without cable end, power circuit: lug-clamp 1 x 1-4 mm²flexible with cable end, power circuit: cable 1 x 1.5-10 mm²flexible without cable end, power circuit: cable 1 x 1-4 mm²flexible with cable end, control circuit: cable 1 x 1-25 mm²flexible without cable end, control circuit: lug-clamp 2 x 1-25 mm²flexible without cable end, control circuit: lug-clamp 2 x 1-25 mm²flexible with cable end, control circuit: lug-clamp 1 x 1-25 mm²flexible without cable end, control circuit: cable 1 x 1-25 mm²flexible with cable end |
| Net weight | 0.172 kg |
| Signalling function | 2 LEDs |
| Protection type | gG fuse 3 A - for control circuit, GB2 circuit breaker 3 A - for control circuit, BS fuse 3 A - for control circuit |
| Phase failure sensitivity | < 3 s |
| Reset | manual reset, electrical by interruption of power supply for minimum 0.1 s, automatic reset 120 s fixed |
| Tightening torque | power circuit: 2 N.m on cable, control circuit: 0.6...1.2 N.m on lug-clamp |
| [Ith] conventional free air thermal current | 3 A for control circuit |
| Height | 67.5 mm |
| Network frequency | 50...60 Hz |
| Time range | 0.5..30 s - D-time knob, 0.3...10 s - O-time knob, 0.2...10 s - O-time knob |
| Environment | |
| Resistance to fast transients | 2 kV |
| Fire resistance | 850 °C conforming to IEC 60695-2-1 |
| Operating altitude | 2000 m |
| Resistance to electrostatic discharge | 8 kV in air, 6 kV in indirect mode |
| Protective treatment | TH conforming to IEC 60068 |
| Ambient air temperature for storage | -30-80 °C |
| Vibration resistance | 4 gn conforming to IEC 60068-2-6 |
| IP degree of protection | IP20 conforming to IEC 60529 |
| Dielectric strength | 2 V 50 Hz conforming to IEC 60255-5 |
| Shock resistance | 15 gn 11 ms conforming to IEC 60068-2-7 |
| Ambient air temperature for operation | -25-60 °C conforming to IEC 60947-4-1 |
| Disturbance radiated/conducted | class A conforming to EN 55011, 10 V conforming to EN 61000-4-6 |
| Resistance to radiated fields | 10 V/m level 3 |
| Standards | IEC 60947, IEC 60255-6 |
| Product certifications | GOST, UL, CSA |
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