Thermal Overload Relays - Schneider Electric

Schneider Electric LR3D10L6 is a non-differential thermal overload relay designed for unbalanced networks, belonging to the LR3D sub-range. It features a 3-pole configuration and offers protection functions with a class 20 rating. The relay is designed for direct connection to a contactor upstream, with outgoing cables connected to lugs and a control circuit connected via screw-clamp terminals. It supports a rated current range of 4-6 A, with protection settings adjustable within the same range. The LR3D10L6 includes 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts for enhanced control functionality. It is capable of handling a rated voltage (AC) of up to 690 V at frequencies ranging from 0 to 400Hz, with a minimum operating current of 4 A and a maximum of 6 A.

Schneider Electric LT4760M7S, part of the LT47 sub-range, is a 3-pole electronic overcurrent relay designed for use with 2 measurement current transformers in a control circuit featuring screw-clamp connections. It offers protection functions including electronic overcurrent relay, locked rotor mechanical jamming, overload with Imax greater than Isetting, and sensitivity to phase failure. The rated current range is 5-60 A, with control voltage specifications of 200-240 Vdc for DC and 200-240 Vac (50/60Hz) for AC. Protection settings include thermal overload adjustments from 5-60A, a D-time knob ranging from 0.5-30s, and an O-time knob from 0.3-10s. It also features 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts. The supply voltage is rated at 200-240 V for both AC and DC, with a rated voltage (AC) phase-to-phase of 690 V (50-60Hz). The minimum and maximum currents are set at 5 A and 60 A, respectively.

Schneider Electric LT4706BS, part of the LT47 sub-range, features a connection type of 2 measurement current transformers with screw-clamp terminals and is designed with 3 poles. It includes protection functions such as an electronic overcurrent relay, locked rotor mechanical jamming, overload protection with Imax greater than Isetting, and sensitivity to phase failure. The rated current for this device ranges from 0.5-6 A, and it operates with a control voltage of 24 Vdc. Protection settings include thermal overload adjustments from 0.5-6A, with a D-time knob ranging from 0.5-30s and an O-time knob from 0.3-10s. It also supports a control voltage (AC) of 24 Vac at 50/60Hz, includes 1 Normally Open (NO) auxiliary contact and 1 Normally Closed (NC) auxiliary contact, and requires a supply voltage of 24 V AC/DC. The rated voltage (AC) phase-to-phase is up to 690 V at 50-60Hz, with a minimum current of 0.5 A and a maximum current of 6 A.

Schneider Electric LR97D015B is a 3-pole electronic overcurrent relay designed for direct connection to a contactor with outgoing cables and control circuits connected via screw-clamp. It features protection functions including electronic overcurrent relay, locked rotor mechanical jamming, overload with Imax greater than Isetting, and sensitivity to phase failure. The rated current range is 0.3-1.5 A, with protection settings for thermal overload adjustable between 0.3-1.5A, a D-time knob setting range of 0.5-30s, and an O-time knob setting range of 0.3-10s. It includes 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts. The supply voltage is 24 V AC/DC, with a rated voltage for phase-to-phase connections at 690 V AC (50-60Hz). The minimum current capability is 0.3 A, and the maximum current capability is 1.5 A.

Schneider Electric LRD340L3 is a differential thermal overload relay designed for direct connection to a contactor, featuring spring-type fast connections for both upstream and outgoing cables as well as the control circuit. This 3-pole device offers protection functions classified under Class 20, with a rated current range of 30-40 A. It includes protection settings for thermal overload within the same current range. The LRD340L3 is equipped with 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts. It operates effectively within a voltage range up to 690 V AC (0-400Hz) and supports a minimum current of 30 A and a maximum current of 40 A.

Schneider Electric LRD332L3, part of the LRD sub-range, is a differential thermal overload relay designed for direct connection to a contactor and features spring-type fast connections for both upstream and outgoing cables, as well as the control circuit. This 3-pole device offers protection functions with a Class 20 rating and is adjustable for rated currents between 23-32 A. It includes 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts. The LRD332L3 is capable of handling a phase-to-phase rated voltage (AC) of up to 690 V at frequencies ranging from 0 to 400Hz, with a minimum operating current of 23 A and a maximum of 32 A.

Schneider Electric LRD325L3 is a differential thermal overload relay belonging to the LRD sub-range, designed for direct connection upstream to a contactor and features outgoing cables with spring-type fast connections, as well as a control circuit with spring-type fast connections. This 3-pole device offers protection functions classified as Class 20, with a rated current range of 17-25 A. The protection settings for thermal overload are adjustable between 17-25A. It includes 1 Normally Open (NO) auxiliary contact and 1 Normally Closed (NC) auxiliary contact. The rated voltage for AC phase-to-phase operation is up to 690 V, accommodating frequencies from 0 to 400Hz. The minimum operating current is set at 17 A, with a maximum threshold of 25 A.

Schneider Electric LR7K0314 is a non-differential thermal overload relay designed for unbalanced networks, belonging to the LR7K sub-range. It features a 3-pole configuration and offers protection functions classified under Class 10A. The relay supports a rated current range of 5.5-8 A with protection settings adjustable within the same range. Connection types include direct to contactor for upstream connections and screw-clamp terminals for both outgoing cables and the control circuit. It is equipped with 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts. The rated voltage for phase-to-phase connections is up to 690 V, with the minimum operating current set at 5.5 A and the maximum at 8 A.

Schneider Electric LR7K0308 is a non-differential thermal overload relay designed for unbalanced networks, classified under the LR7K sub-range. It features a 3-pole configuration and offers protection functions with a Class 10A designation. The relay supports a rated current range of 1.8-2.6 A, with protection settings adjustable within the same range. Connection types include direct to contactor for upstream connections and screw-clamp for both outgoing cables and the control circuit. It is equipped with 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts. The rated voltage for phase-to-phase connections is up to 690 V, with a minimum operating current of 1.8 A and a maximum of 2.6 A.

Schneider Electric LR7K0305 is a non-differential thermal overload relay designed for unbalanced networks, belonging to the LR7K sub-range. It features a direct connection type upstream to the contactor and screw-clamp connections for outgoing cables and the control circuit. This 3-pole relay is equipped with protection functions classified as Class 10A, with a rated current range of 0.54-0.8 A. The protection settings for thermal overload are adjustable within the same range of 0.54-0.8A. It includes 1 Normally Open (NO) auxiliary contact and 1 Normally Closed (NC) auxiliary contact. The rated voltage for phase-to-phase connections is 690 V, with a minimum current threshold of 0.54 A and a maximum current capacity of 0.8 A.