Schneider Electric LR97D25B Electronic Overcurrent Relay, Tesys LR97D, 24VAC/DC, 5 to 25A, 1C/O

TeSys LR97D electronic overcurrent relay, 25A/690V, to be supplied with 24V AC/DC, 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. Settings also include selectors for 1-phase/3-phase motors and manual/automatic reset, the device has a reset button, a test/stop button, 2 LED indicators (Run/Trip), 2 auxiliary contacts 1NO/NC for fault signaling. Settings can be locked by sealing the transparent cover. For direct attachment to the bottom terminals of a 3-phase 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.

Main

• Device Short Name: LR97
• Product or Component Type: Electronic overcurrent relay
• Device Application: Protection and relay application
• Overload: Imax > Isetting
• Locked Rotor, Mechanical Jamming: I > 3 x Isetting
• Sensitivity to Phase Failure: Yes
• Product Compatibility: LC1D09...D38
• Network Type: AC, DC
• [Us] Rated Supply Voltage: 24 V AC/DC
• Thermal Protection Adjustment Range: 5…25 A
• [Ue] Rated Operational Voltage:
• 600 V AC 50/60 Hz for power circuit conforming to CSA
• 600 V AC 50/60 Hz for power circuit conforming to UL
• 690 V AC 50/60 Hz for power circuit conforming to IEC 60947-4-1
• Quantity Per Set: Set of 10

Complementary

• Network Frequency: 50-60 Hz
• Mounting Support: Direct on contactor, Rail
• Tripping Threshold: 5-21 A
• Surge Withstand: 6 kV conforming to IEC 61000-4-5
• Contacts Type and Composition: 1 C/O (1 Normally Open, 1 Normally Closed)
• Conventional Free Air Thermal Current ([Ith]): 3 A for control circuit
• Protection Type:
• BS Fuse 3 A for control circuit
• GB2 Circuit Breaker 3 A for control circuit
• GG Fuse 3 A for control circuit
• Maximum Power:
• 28 W at 110 V DC
• 28 W at 220 V DC
• 55 W at 24 V DC
• 55 W at 48 V DC
• 140 VA at 48 V AC
• 360 VA at 110 V AC
• 360 VA at 220 V AC
• 70 VA at 24 V AC (conforming to IEC 60947)
• Rated Insulation Voltage ([Ui]):
• Power circuit: 600 V (conforming to CSA and UL)
• Power circuit: 690 V (conforming to IEC 60947-4-1)
• Rated Impulse Withstand Voltage ([Uimp]): 6 kV
• Phase Failure Sensitivity: < 3 s
• Reset:
• Automatic reset: 120 s fixed
• Electrical by interruption of power supply for minimum 0.1 s
• Manual reset
• Time Range:
• 0.2-10 s (O-time knob)
• 0.3-10 s (O-time knob)
• 0.5-30 s (D-time knob)
• Signalling Function: 2 LEDs
• Connections - Terminals:
• Control circuit:
• Cable 1 x 1-25 mm² flexible with cable end
• Cable 1 x 1-25 mm² flexible without cable end
• Cable 2 x 1-25 mm² flexible with cable end
• Cable 2 x 1-25 mm² flexible without cable end
• Lug-clamp 1 x 1-25 mm² flexible with cable end
• Lug-clamp 1 x 1-25 mm² flexible without cable end
• Lug-clamp 2 x 1-25 mm² flexible with cable end
• Lug-clamp 2 x 1-25 mm² flexible without cable end
• Power circuit:
• Cable 1 x 1-4 mm² flexible with cable end
• Cable 1 x 1.5-10 mm² flexible without cable end
• Lug-clamp 1 x 1-4 mm² flexible with cable end
• Lug-clamp 1 x 1.5-10 mm² flexible without cable end
• Tightening Torque:
• Control circuit: 0.6-1.2 N.m on lug-clamp
• Power circuit: 2 N.m on cable
• Dimensions:
• Height: 67.5 mm
• Width: 45 mm
• Depth: 67.5 mm
• Net Weight: 0.172 kg