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NEMA Overload Relays

Protecting motors from overload conditions is the function of NEMA overload relays. These devices are quite similar to thermal overload relays, which detect and respond to excessive motor currents. Both types of relays work by interrupting power supply to the motor when necessary. Although neither type can prevent a motor from being subjected to extreme operating conditions, they will help limit how long such conditions go on.

To choose the right NEMA overload relay, several particulars of the motor must be considered: its power, size, and type. The relay itself must be proportionate to the motor and sized to protect it reliably. That's because when an electrical motor is operating near its capacity, heat develops inside it; if that keeps happening over time (as will happen if the protection system isn't working properly), the motor will eventually fail.

Products

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$283.05
Overload Relay, Type S, melting alloy, Size 2, 3 pole, 45A maximum, 600 VAC, separate mount, panel mount
$197.40
Melting alloy overload relay, NEMA Size 1, three pole, 25 A, 600 VAC
$316.65
Melting alloy overload relay, NEMA Size 2, three pole, 45 A, 600 VAC
$228.00
Melting alloy overload relay, NEMA Sizes 00, 0,1, three pole, 27 A, 600 VAC
$331.50
Motor Logic Solid State Overload Relay Replacement Size 5 90-270A 600VAC
$774.00
Motor Logic solid state overload relay, replacement, Size 4, 45 to 135 A, 600 VAC
$526.50
Motor Logic solid state overload relay, replacement, NEMA Size 3, 30 to 90 A, 600 VAC