UL1077

UL508

UL489

UL1077

UL508

UL489

They allThey alllook alike?look alike?

What’s the difference?What’s the difference?

UL1077- Supplementary Protector (SP)Supplementary Protector (SP)

Only for overload protection!!!Only for overload protection!!!(has a thermal element inside)(has a thermal element inside)

UL508- Manual Motor Controller (MMC)Manual Motor Controller (MMC)

• Includes overload protectionIncludes overload protection• Includes switching functionIncludes switching function• Includes disconnect functionIncludes disconnect function

UL489- Circuit Breaker (MCCB) (CB)Circuit Breaker (MCCB) (CB)

• Includes overload protectionIncludes overload protection• Includes switching functionIncludes switching function• Includes disconnect functionIncludes disconnect function• Includes short circuit protectionIncludes short circuit protection

PRICING

UL1077UL1077 UL508UL508 UL489UL489$ $$

$$$$$

Selection

Not by price!!!

• Application• Function• Requirements by NEC or UL standards

• Application• Function• Requirements by NEC or UL standards

… but by:

Selection

Devices may use a combination of allthree types of protection devices.

Devices may use a combination of allthree types of protection devices.

Fuses

Combination 1UL1077 - Supplementary Protection can be used in

combination with a MCCB or a Fuse.UL1077 - Supplementary Protection can be used in

combination with a MCCB or a Fuse.

• Overload protectionOverload protection(SP)(SP)

• Switching functionSwitching function(MCCB)(MCCB)

• Disconnect function Disconnect function (MCCB) (MCCB)

• Short circuit protection Short circuit protection (MCCB) (MCCB)

• Overload protectionOverload protection(SP)(SP)

• Short circuit protection Short circuit protection (Fuse) (Fuse)

• Switching functionSwitching function• Disconnect functionDisconnect function

Combination 2UL508 - Manual Motor Controller can be used in

combination with MCCB and a Fuse.UL508 - Manual Motor Controller can be used in

combination with MCCB and a Fuse.

• Overload protectionOverload protection(MMC)(MMC)

• Switching functionSwitching function(MMC)(MMC)

• Disconnect function Disconnect function (MMC) (MMC)

• Short circuit protection Short circuit protection (MCCB) (MCCB)

• Overload protectionOverload protection(MMC)(MMC)

• Switching functionSwitching function(MMC)(MMC)

• Disconnect functionDisconnect function (MMC) (MMC)

• Short circuit protection Short circuit protection (Fuse) (Fuse)

Summary

StandardStandard

AltechAltech

DescriptionDescription

UL508

UL1077

UL489