The PKZ 2/ZM-.../S-SP has two sets of main contacts, both current-limiting in design. This provides it with a high interrupting rating and the capability to protect itself against damage under fault conditions. No contact welding can ensue thus providing for continuity of service.
Each unit consists of a basic frame (disconnect switch and contactor) rated to switch a motor load of 30Hp at 460V, 25 Hp at 575V AC. Eleven plug-in trip modules are available to cover motor loads ranging from fractional Hp sizes through 30 Hp at 460V and 25 Hp at 575V AC. As a result, stocking of parts is minimized and use of the starter for other motor loads may be as simple as plugging-in a new trip module and setting the trip module response dials.
| PKZ2/ZM-xx/S-SP | ZM Trip Modules | LOAD | RANGE | ||
|---|---|---|---|---|---|
| Complete Self Protected Starter | Only Trip Modules | Hp @ 230 |
Hp
@ 460 |
Thermal
Amps
|
Magnetic
Amps
|
|
|
||||
| - | - | 0.4-0.6 | 5-8 | ||
| - | .5 | 0.6-1 | 8-14 | ||
| - | .75 | 1 - 1.6 | 14-22 | ||
| .5 | 1 | 1.6-2.4 | 20-35 | ||
| 1 | 2 | 2.4-4 | 35-55 | ||
| 1.5 | 3 | 4-6 | 50-80 | ||
| 3 | 5 | 6-10 | 80-140 | ||
| 5 | 10 | 10-16 | 130-220 | ||
| 7.5 | 20 | 16-27 | 200-350 | ||
| 10 | 20 | 24-32 | 275-425 | ||
| 15 | 30 | 32-42 | 350-500 | ||