Schneider Electric LC1E0910B5 EasyPact TVS 9 A 24 V AC Contactor

LC1E0910B5: 9 A AC-3, 24 V AC coil EasyPact TVS contactor

The LC1E0910B5 is a Schneider Electric contactor described in the datasheet as: EasyPact TVS contactor 3P(3 NO) – AC-3 – <= 440 V 9A – 24 V AC coil. It belongs to the Easy TeSys control range and is a three-pole device for switching motors and resistive loads. Seven Star LLC supplies the LC1E0910B5 in Oman and the GCC as an independent supplier based in Muscat.

Reading the reference: LC1E is the contactor family; the digits correspond to the 9 A AC-3 rating shown in the datasheet title, and the suffix gives the control coil, which the datasheet states as 24 V AC 50 Hz. A 24 V AC coil makes this the version for panels that run their control circuit from a small control transformer or from a separate extra-low-voltage supply, which is common where operators touch the pilot devices and a lower control voltage is preferred. The 9 A rating suits small pumps, fans and auxiliary motors.

Technical specifications of the LC1E0910B5

What the LC1E0910B5 can switch

For motor duty the datasheet lists AC-3 at 9 A and AC-3e at 9 A at up to 440 V AC (below 55 °C), and 25 A in AC-1 for resistive loads. The motor powers stated are 2.2 kW at 220/230 V, 4 kW at 380/400 V, and 4 kW at 660/690 V (with 5.5 kW listed at 660 to 690 V). The rated operational voltage of the power circuit is up to 690 V AC at 50/60 Hz.

Short-circuit data matter for coordination: the making capacity is 117 A, the breaking capacity is 76.5 A at 440 V, and the associated fuse for type 1 coordination is 20 A gG. Per-pole dissipation is 0.2 W AC-3; 1.6 W AC-1, and the average contact impedance is 2.5 mOhm, so heating in a closed panel can be estimated from these figures.

Coil data of the LC1E0910B5 and the control circuit

The coil is rated 24 V AC 50 Hz. The datasheet gives the operating window as 0.85 to 1.1 Uc and the drop-out as 0.3 to 0.6 Uc, which translates here to operation between 20.4 and 26.4 V and drop-out between 7.2 and 14.4 V. Control-circuit designers should check that voltage drop over long cable runs and during motor starting still leaves the coil above the pick-up limit.

At 50 Hz the inrush is 95 VA and the hold-in is 8.3 VA, which at the rated voltage is about 3.96 A and 0.346 A respectively. These are the figures a control transformer or PLC output must carry, and the datasheet operating times are 12 to 22 ms on closing; 4 to 19 ms on opening, so closing and opening are quick events compared with the run-up of the motor.

Auxiliary contact, terminals and durability of the LC1E0910B5

The built-in auxiliary contact composition is 1 NO. Terminal tightening is listed as power circuit: 1.2 N.m; control circuit: 1.2 N.m. Use a torque screwdriver and re-check after the first heat cycles, because loose power terminals are the most common cause of heating in small contactors.

Durability is stated as 10000000 cycles mechanically and 1400000 cycles AC-3; 150000 cycles AC-1 electrically, and the maximum operating rate is 1800 cyc/h 60 °C. Frequent starting and stopping consumes electrical life faster than the rating suggests, so for high switching rates compare your duty with these cycle counts.

Before ordering the LC1E0910B5

• Motor current: compare the nameplate current with 9 A (AC-3) and, if the motor is high efficiency, with the AC-3e value of 9 A.
• Coil voltage: the control supply must be 24 V AC 50 Hz; the limits are 20.4 to 26.4 V.
• Overload protection: add a thermal overload relay or motor circuit breaker sized to the motor; the contactor itself does not give overload protection.
• Short-circuit protection: the datasheet quotes 20 A gG for type 1 coordination.
• Space: 45 mm wide, 74 mm high and 80 mm deep, 0.3 kg.
• Status: say whether you need a spare for an existing starter or a new installation.

Environment, mounting and approvals of the LC1E0910B5

The LC1E0910B5 is rated for -5 to 55 °C in operation and -60 to 80 °C in storage, with altitude up to 3000 m without derating. Protection is IP2X conforming to IEC 60529, so the device needs to be inside an enclosure. Mounting is on DIN rail or Plate. In Oman the upper limit of 55 °C is the figure to check against the real panel temperature in summer, because a closed panel in the sun can run far above the outdoor air.

Certifications listed for this reference are CB Scheme; CCC; CE; EAC; BIS. Only these should be assumed; if a project requires another approval, send the requirement and we will check it against the datasheet.

Where the LC1E0910B5 is used in Oman and the GCC

This contactor frame is typical for starters of pumps, fans, compressors and conveyors in utilities, water and wastewater works, ventilation plant and light industry, as well as for switching resistive loads such as heaters. In Oman and the GCC such panels see long periods of heat, and dust and humidity on the coastal side, so enclosure ventilation and clean, tight terminations decide the real life of the contactor.

For the LC1E0910B5 the points to check are the 9 A AC-3 rating, the 24 V AC coil and the body of 45 mm x 74 mm x 80 mm with a weight of 0.3 kg; the rest of the data follows from those three choices.

Information to send with an RFQ for the LC1E0910B5

• Full reference LC1E0910B5 and the quantity required
• Motor nameplate data or load description
• Control circuit voltage and frequency
• Required delivery location and timing
• Whether it is a spare, a replacement or a new installation

Documents and quotation

A datasheet for this product is attached on this page. It lists the electrical, mechanical and environmental data summarised above, and it is the document to check against your own drawings.

Send us the part number, quantity and application and we will confirm availability and a quotation. Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer.