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UL1077 UL508 UL489

UL1077 UL508 UL489. They all look alike?. What’s the difference?. UL1077- Supplementary Protector (SP). Only for overload protection!!! (has a thermal element inside). UL508- Manual Motor Controller (MMC). Includes overload protection Includes switching function

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UL1077 UL508 UL489

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  1. UL1077 UL508 UL489 They all look alike? What’s the difference?

  2. UL1077- Supplementary Protector (SP) Only for overload protection!!! (has a thermal element inside)

  3. UL508- Manual Motor Controller (MMC) • Includes overload protection • Includes switching function • Includes disconnect function

  4. UL489- Circuit Breaker (MCCB) (CB) • Includes overload protection • Includes switching function • Includes disconnect function • Includes short circuit protection

  5. $ PRICING $ $ $ $ $ $ $ UL1077 UL508 UL489

  6. Selection Not by price!!! … but by: • Application • Function • Requirements by NEC or UL standards

  7. Selection Devices may use a combination of allthree types of protection devices. Fuses

  8. Combination 1 UL1077 - Supplementary Protection can be used in combination with a MCCB or a Fuse. • Overload protection(SP) • Switching function(MCCB) • Disconnect function (MCCB) • Short circuit protection (MCCB) • Overload protection(SP) • Short circuit protection (Fuse) • Switching function • Disconnect function

  9. Combination 2 UL508 - Manual Motor Controller can be used in combination with MCCB and a Fuse. • Overload protection(MMC) • Switching function(MMC) • Disconnect function (MMC) • Short circuit protection (MCCB) • Overload protection(MMC) • Switching function(MMC) • Disconnect function (MMC) • Short circuit protection (Fuse)

  10. Summary UL1077 UL508 UL489 Altech Standard Description

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