Page 565 - Motor_protection_and_control_Manual_motor_starters_ contactors

Mechanical latching unit

Technical data

Types WA4, WA4-96 WA4
Coil voltage code 11, 12, 13, 14 10
Standards IEC 60947-4-1
Rated insulation voltage Ui
acc. to IEC 60947-1 690 V AC
Coil operating limits AC supply At θ ≤ 70 °C 0.85 x Uc min … 1.1 x Uc max –
acc. to IEC 60947-4-1 DC supply At θ ≤ 70 °C 0.85 x Uc min … 1.1 x Uc max At θ ≤ 70 °C 0.85 x Uc … 1.1 x Uc
Control circuit voltage
AC control voltage 50/60 Hz
Rated control circuit voltage Uc 24 … 500 V AC 50/60 Hz –
Coil consumption Average pull-in value 15 … 100 VA –
DC control voltage 50/60 Hz
Rated control circuit voltage Uc 24 … 500 V DC 24 V DC
Coil consumption Average pull-in value 15 ... 100 W 12 W
Max. electrical impulse time
On AC control supply (with load factor 1.6%) 4 s –
On DC control supply (with load factor 1.6%) 4 s
Min. electrical impulse time
For latching, energizing of the contactor coil 120 ms
For unlatching, energizing of the mechanical latching unit coil 50 ms
Operating time
On contactor closing (latching) between coil energization and:
N.O. contact closing No difference with the operation of a contactor without mechanical latching unit
N.C. contact opening No difference with the operation of a contactor without mechanical latching unit
On contactor opening (unlatching) between mechanical latching unit
coil energization and:
N.O. contact opening 8 … 15 ms
N.C. contact closing 10 ... 17 ms
Ambient air temperature
Operation -25 ... +70 °C
Storage -60 … +80 °C
Climatic withstand Category B according to IEC 60947-1 Annex Q
Max. operating altitude ≤ 3000 m
Mounting positions Mounting positions 1, 1+/- 30°, 2, 3, 4, 5
Mechanical durability AF09 ... AF38, NF: 1 million operating cycles
AF40 ... AF65: 0.5 million operating cycles
AF80, AF96: 0.2 million operating cycles
Max. switching frequency
with on-load factor of 1.6% cycles/h 600

Connecting characteristics
Connection capacity (min. ... max.)
Rigid solid 1 x 1 ... 2.5 mm²
2 x 1 ... 2.5 mm²
Flexible with non insulated ferrule 1 x 0.75 ... 2.5 mm²
2 x 0.75 ... 2.5 mm²
Flexible with insulated ferrule 1 x 0.75 ... 2.5 mm²
2 x 0.75 ... 1.5 mm²
L Lugs L < 8 mm
6
Connection capacity acc. to UL / CSA 1 or 2 x AWG 18 ... 14
Stripping length 10 mm
Tightening torque 1.2 Nm / 11 lb.in
Degree of protection
acc. to IEC 60947-1 / EN 60947-1 and IEC 60529 / EN 60529 IP20
Screw terminals Delivered in open position
All terminals M3.5
Screwdriver type Flat Ø 5.5 / Pozidriv 2

1SBC100205S0201

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