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LH-Frame Circuit Breakers

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Square D by Schneider Electric has a wide range of Molded Case Circuit Breakers that are designed with thermal magnetic protection. Thermal trip element circuit breakers protect a circuit against a small overload that continues for a long time. The larger the overload, the faster the circuit breaker will trip. The thermal element will also protect against temperature increases. Magnetic circuit breakers will trip instantly when the preset current is present. Thermal magnetic circuit breakers contain both types of protection in a single unit. 

LA and LH Molded Case Circuit Breakers provide thermal magnetic protection from 125 to 400 Amps as part of the Square D portfolio of molded case circuit breakers. They are available in 2 and 3 pole design with unit-mount, I-line or rear-connect constructions. LH molded case circuit breakers are used in industrial enclosures, switchboards, panelboards, busway plug-in units, combination starters and motor control centers.

Products

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Schneider Electric LHL36400MB LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 400A, 3P, SHORT HANDLE
Schneider Electric LHL36400MB LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 400A, 3P, SHORT HANDLE
$10637.20
LH MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 400A, 3P, SHORT HANDLE
Schneider Electric LHL364001021 LH Frame MOLDED CASE CIRCUIT BREAKER 600V 400A
Schneider Electric LHL36400 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 400A, 3P
Schneider Electric LHL36350 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 350A, 3P
Schneider Electric LHL36300 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 300A, 3P
Schneider Electric LHL36250 LHL LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 250A, 3P
Schneider Electric LHL36225 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 225A, 3P
Schneider Electric LHL36200 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 200A, 3P
Schneider Electric LHL36150 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 150A, 3P
Schneider Electric LHL36000MV LHL LH Frame MOLDED CASE CIRCUIT BREAKER,600VAC, 400A, 3P, WITH VISI-BLADE
Schneider Electric LHL36000M LHL MOTOR CIRCUIT PROTECTOR, 600VAC, 400A, 3P
Schneider Electric LHL26400 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER,600VAC/250VDC, 400A, 2P

 

There are two different types of technologies that are commonly used in circuit breakers. 

Magnetic Breakers are designed to react to short circuits or sharp spikes in voltage and current. The more current that passes through the breaker’s electromagnet, the stronger the magnet becomes. When the current exceeds the rating for that particular breaker, the magnetic force becomes strong enough that it will pull the contact back and disconnect it from the other contact, disconnecting power from the device.
Thermal Protection Breakers protect against a sustained overcurrent, or a higher current, for a longer period of time. Thermal protection uses a Bimetal strip that will bend the contacts away from each other to disconnect power.

Thermal Magnetic Breakers are the most common type of circuit breakers. They combine magnetic technology to protect against short circuits or sharp spikes and thermal technology that protects against sustained overcurrent for a long period of time.

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