APL/UPL DECISION TABLES

How to Order

The ordering code for APL/UPL circuit protectors may be

determined by following the steps in the decision tables shown

here.

The coding given permits a self-assigning part number; other

configurations may require a factory assigned part number.

Typical examples are units with mixed ratings, combinations of

styles or constructions not listed in the third decision table, etc.

With these, it is suggested that order entry be by description

and/or drawings and a part number will be assigned. Additionally,

it is a standard policy to establish a factory assigned part number

wherever a descriptive drawing exists to provide cross

reference, traceability and manufacturing control.

When specifying a protector for AC motor start or high inrush

applications, the peak amplitude and surge duration should be

specified for factory assistance in rating selection.

For example, the code shown is the code for a two pole UPL

protector with series trip, 20 ampere rating, 50/60Hz. short time

delay construction in all poles.

To determine the ordering number for your particular APL/UPL

unit, simply follow the steps shown. You may use this number to

place an order or as a reference for further questions you may

have.

Notes:

A The most common current values for 100% of rated current are

those listed. Please consult an Airpax office orsales representa-

tive for other values.

B All APL/UPL protectors are constructed with stainless steel

springs and plated parts. As noted in the specifications, all meet

normal requirements for moisture and salt spray resistance. If

fungus resistance is required in addition to moisture and salt

spray resistance, special procedures and markings are employed.

C Terminals will be supplied as #10-32 threaded studs up to 50

amperes. Above this amperage terminals will be ¼-28 threaded

studs. All standard units will be supplied with a hex nut and two

flat washers on each threaded terminal.

D When metric threaded inserts are specified, breakers rated at

50 amperes and below will be supplied with metric threaded

terminals. For breakers rated above 50 amperes, ¼ -28 threaded

terminals will be supplied.

E Black handle standard.