Help for the application "Cable Selector"

This program is meant as a simple tool for cable selection. It calculates corrections due to heat and due to voltage drop in the cable.

Note that there are more factors than heat and current that determines the correct cable selection, matters like chemical resistance, abrasion, fuses etc. Several cable types are available. Different standards apply in various countries.

Various Flygt pumps and mixers can use different number of cables. This is not shown in the Cable selector.

There are two different modes in the application, 'Find cable' and 'Calculate power limits'.

General

On the right you see the input values and calculate the result. Blue boxes must be filled in before calculation.

Start method, high temperature and high voltage exclude non-relevant cable types

Export: input values and result transferred to Excel

Clear returns everything to the default settings

Decimal "," and "." can be entered with local preferences. The result is shown in English with "." as in 10.5 "ten point five"

Preferences Motor Data Cable Type Cable

Choose "Units" and "Capacity correction area"

Choose function "Find cable" or "Calculate power limits"

Changing any setting under Preferences returns everything else to the default settings

Find cable - Find cable from given motor data

Preferences Motor Data Cable Type

Choose if you want to enter the Rated current or Shaft power by choosing the 'current' or 'power' radio button.

Check defaults and fill in empty boxes

Preferences Motor Data Cable Type

Choose cable type

Choose number of parallel cables if you have a preference. "1" allows the program to suggest the minimum number of cables possible

Find cable

Recheck input values and click Find cable

You can change input values and click Find cable again

Result

Max allowed current is the calculated power limit for the cable

The selected cable is the smallest one matching the rated current of the motor

Nominal current at 30^oC is the current capacity of the cable according to IEC 60364-5-523

Rated current is your input value

Total weight is weight/m x cable length x number of cables

Calculate power limits - Calculate power limits from selected cable

Preferences Motor Data Cable Type Cable

Check defaults and fill in empty boxes

Preferences Motor Data Cable Type Cable

Choose cable type

Preferences Motor Data Cable Type Cable

Choose number of parallel cables for your case

Select Cable or Flygt Part Number

Find cable

You can change input values and click Calculate again

Result

Rated current is the calculated maximum allowed motor current for this case

Shaft power is the calculated maximum allowed shaft power for this case

Nominal current at 30^oC is the current capacity of the cable according to IEC 60364-5-523

Total weight is weight/m x cable length x number of cables

Note the number of cables required for the specified case

Temperature correction

Temperature correction factors for Flygt cables

The current capacities for Flygt cables are designed for duty at 30^oC ambient temperature. If the ambient temperature exceeds 30^oC, the maximum current rating the conductors can handle has to be taken into consideration. The current rating must be adjusted (lowered) according to the table.

Note that there are no reduction factors för the Flygt HCR cables and the Silicone cables up to 90^oC, due to their insulation materials´ resistance to high temperatures.

Example

Select cable for a pump with a pump current of 33 A and an ambient temperature of 52^oC:

• Select correction factor for 52^oC in the table (0,76)
• Calculate "virtual" current 33 / 0,76 = 44A
• Choose 4 G 6 mm² at 52^oC, rated 54A

Ambient temperature correction factors

According to IEC 60364-5-523 table 52-D1 and NEC table 310-16 (USA/Canada) in air.

For support please contact