Page 140 - Motor_protection_and_control_Manual_motor_starters_ contactors

DOL & reversing starters protected by thermal overload relays

With AS, ASL contactors - open type version in kit form

Application
Full voltage direct-on-line and reversing starting for controlling three-phase asynchronous motors is a sim-
1SBC101204F0014 a starting current 5.5 to 7 times nominal current.
ple and economic solution characterised by a high starting torque (1.9 to 2.1 times full-speed torque) and
I
7 /In C /Cn
6
I
5
I = current
4 C = torque
AS09-30-10 + T16 In = nominal current
4 3 Cn = nominal torque
2
C
1
0 10 30 60 80 100

Coordination types
1SBC101205F0014 The contactor, the short-circuit protection device and the thermal overload relay control and protect
motors against overload and short-circuits according to coordination types 1 and 2 (IEC 60947-4-1 /
EN 60947-4-1) defining the anticipated level of service continuity as follow:
Type 1: In short-circuit conditions, the contactor or starter does not endanger persons or installations and
will not be able to then operate without being repaired or having parts replaced.
Type 2: In short-circuit conditions, the contactor or starter does not endanger persons or installations and
will be able to operate afterwards. The risk of contacts light welding is acceptable.

AS09-30-01 + BER16C + VM3 + T16
Main technical data
Standards IEC 60947-4-1 / EN 60947-4-1
Rated operational voltage Ue max. 690 V - 50/60 Hz
Rated insulation voltage Ui according to IEC 60947-4-1 690 V
Air temperature close to the device ≤ 60 °C
Degree of protection IP20
Switching frequency 140
Thermal overload relays cannot be operated at any Ta = 0.5 s
arbitrary switching frequency in order to avoid tripping. 120
Applications involving up to 15 operations per hour are
acceptable. Higher switching frequencies are permitted Switching frequency (ops/h) 100
if the duty ratio and the motor starting time are allowed Ta = 1 s
for and if the motor's making current does not appreci- 80
ably exceed 6 times the rated operating current. Please 60
refer to the adjacent diagram for guideline values for Ta = 1.5 s
the permitted switching frequency. 40
Example:
Starting time of the motor: 1 second Duty ratio: 40 % 20 Ta = 3 s
means a permitted switching frequency of max. 60 Ta = 5 s
operating cycles per hour. 0
0 10 20 30 40 50 60 70 80 90 100
Duty ratio (%)
Duty ratio in %, Ta: motor starting time
Note: Minimum switchover delay of 50 ms must be introduced between respective opening and closing of AC operated reversing
contactors

Mounting positions
Direct-on-line Reversing

1SBC101275S0201

Pos. 1 Pos. 1

4/20 | ABB