Page 518 - Motor_protection_and_control_Manual_motor_starters_ contactors

Parallel connection of main poles

General
Purpose: Increasing the AC resistive load by wiring connection of main poles in parallel.
Remarks:
– Parallel connection of main poles to increase the DC resistive load is not acceptable
– Parallel connection of main poles does not increase the breaking capacity.
The table below shows the uprating factor for Ie / AC-1 max. in relation to the number of poles wired connected in parallel and for a maximum
switching frequency.
Note: The poles can be connected in parallel via following connecting strips. See details and permissible current in "Accessory" part.
– LP, LH, LY and LF for parallel connection of 2 or 3 poles
– LG for parallel connection of 4 poles.

L1 L1 L1
5 L2 L2 L2
L3
L3
L3

A825D A826D A827D
N N N
2 poles in parallel 3 poles in parallel 4 poles in parallel

Contactors Factor to be applied to the rated operational current Ie / AC-1 to obtain the permissible current
AC operated DC operated Cycles / h Ie / AC-1 with "n" poles in parallel
3-pole contactors
AF09 ... AF96 AF09 ... AF96 600 1.6 2.2 –
AF116 … AF1250 AF116 … AF1250 300 1.6 2.2 –
AF1350 … AF2650 AF1350 … AF2650 30 1.6 2.2 –
4-pole contactors
AF09 ... AF38 AF09 ... AF38 600 1.6 2.2 2.6
A45 ... A75
AF45 ... AF75 AE45 ... AE75 300 1.6 2.2 2.6
TAE45 ... TAE75
AF45 ... AF75
EK EK 300 1.6 2.2 2.8

1SBC101972S0201

5/318 | ABB