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LC1D18M7 SCHNEIDER

Brand: Schneider

Model number:  LC1D18M7

Colour:new                  

Warranty: 12 months

Lead Time:3-day working day   

Country of origin: USA Price: Please contact us         

Product weight:0.40kg

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

LC1D18M7   SCHNEIDER

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Products Name: LC1D18M7 SCHNEIDER

PRODUCT DESCRIPTION

In order to determine the number of shots required; the first factor is the ability for the circuit breaker to perform several trip-close operations in a short time and, the effect of these operations on the maintenance period.

Description:

Non-Compensated Bimetallic

Bimetallic thermal overload relays employ a U-shape bimetal strip 

associated with a current carrying heater coil.When an overload occurs, the 

heat will cause the bi-metal to deflect and operate a control circuit contact. 

Different heaters give different trip points. In addition, most relays are 

adjustable over a range of 85% to 115% of the nominal heater rating.

Bimetallic overload relays are used where the controller is remote or difficult 

to reach. Three wire control is recommended when automatic restarting of a 

motor could be hazardous to personnel.

Automatic Reset

These relays are field convertible from hand reset to automatic reset and 

vice-versa. On automatic reset after tripping the relay, contacts will 

automatically reclose when the relay has cooled down. This is an advantage 

when the relays are inaccessible. However, automatic reset overload relays 

should not normally be used with 2-wire control. With this arrangement, the 

motor will restart when the overload relay contacts reclose after an overload 

relay trip, and unless the cause of the overload has been removed, the 

overload relay will trip again. This cycle will repeat and eventually the motor 

will burn out due to the accumulated heat from the repeated inrush and 

overload current. More important is the possibility of danger to personnel. 

The unexpected restarting of a machine may find the operator or 

maintenance man in a hazardous situation as he attempts to find out why his 

machine has stopped.

Ambient Temperature Compensated Bimetallic

Ambient-compensated bimetallic overload relays are designed for one 

particular situation; that is, when the motor is at a constant ambient 

temperature and the controller is located separately in a varying ambient 

temperature. In this case, if a standard thermal overload relay were used, it 

would not trip at the same level of motor current if the controller temperature 

changed. The standard thermal overload relay is always affected by the 

surrounding temperature. To compensate for temperature variations, an 

ambient-compensated overload relay is used. Its trip point is not affected by 

temperature, and it performs consistently at the same value of current.

Thermal Overload Relay Trip Characteristics

Melting alloy and bimetallic overload relays are designed to approximate the 

heat actually generated in the motor. As the motor temperature increases, so 

does the temperature of the thermal unit. The motor and relay heating curves 

(left) show this relationship. From this graph we can see that no matter how 

high the current drawn, the overload relay will provide protection yet will not 

trip unnecessarily

LC1D18M7   SCHNEIDER

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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