Page 491 - Motor protection and control Manual motor starters, contactors and overload relays

ABB MOTOR PROTECTION AND CONTROL 3/417

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Control of three-phase slip-ring motors

Contactor selection

Example of a three-stroke starter 03
• The first stroke corresponds to energization of the motor by Stator Rotor short-circuit Acceleration
contactor
contactor
the stator contactor: all the resistances are operational in the contactor
rotor circuit
• At the second stroke, the acceleration contactor short-circuits
the first resistance stack R2 R1
• At the third stroke, the rotor short-circuit contactor is M
activated by eliminating the last resistance stack, thus com- 3
pleting the starting period.

Contactor types AF116 AF140 AF190 AF205 AF265 AF305 AF370 AF400 AF460 AF580 AF750 AF1350 AF1650
Load factor 15 % Ie / AC-2 A 220 335 360 425 530 625 750 850 950 1150 1500 1720 2100
25 % Ie / AC-2 A 185 270 300 350 440 515 620 680 780 975 1250 1430 1750
40 % Ie / AC-2 A 150 215 250 300 370 430 515 580 650 800 1050 1200 1470
60 % Ie / AC-2 A 135 180 220 255 315 370 430 480 550 700 900 1030 1250
S7 acc. to IEC 60034-1: periodical A 116 140 190 210 265 305 370 400 460 580 750 860 1050
continuous duty with electrical breaking

Contactors AF116 AF140 AF190 AF205 AF265 AF305 AF370 AF400 AF460 AF580 AF750 AF1350 AF1650
Rated operational current Ie / AC-1 A 145 175 250 300 350 400 500 500 600 700 800 1150 1450
for air temperature near the contactor
≤ 60 °C (AF116-AF370) ≤ 55 °C
(AF400-AF1650)

Contactor types AF116 AF140 AF190 AF205 AF265 AF305 AF370 AF400 AF460 AF580 AF750 AF1350 AF1650
Load factor 15 % Ie A 330 540 580 750 830 950 1050 1200 1400 1650 1900 2400 2800
25 % Ie A 300 490 530 650 725 830 915 1050 1250 1450 1650 2100 2500
40 % Ie A 260 425 460 575 630 720 800 950 1100 1300 1450 1850 2200
60 % Ie A 230 375 400 500 575 650 700 810 975 1150 1300 1650 1950
S7 acc. to IEC 60034-1: periodical A 200 300 350 380 480 550 640 700 840 980 1150 1500 1800
continuous duty with electrical breaking
Rated operational rotor voltage:
- Maximum values for starting V 2200 3000
and breaking (2600 in star connection) (3600 in star connection)
- Maximum values for starting V 690 1SBC101969S0201 - Rev. B
and electrical braking (730 in star connection)