Page 354 - Motor protection and control Manual motor starters, contactors and overload relays

3/280 ABB MOTOR PROTECTION AND CONTROL

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Mechanical latching unit

The WA4 mechanical latching unit for AF09 ... AF96 contactors and NF contactor relays ensures
that the contactor or contactor relay remains switched on even if there is a lack or a failure of
03
voltage. Standard contactors can be easily converted into compact latched contactors.
The WA4 block contains a mechanical latching device with electromagnetic impulse unlatching
(AC or DC) or manual unlatching.
1SBC101058V0014 Operation
After closing, the contactor continues to be held in the closed position by the latching mechanism
WA4 should the supply voltage fail at the contactor coil terminals.
Contactor opening can be controlled:
• electrically by an impulse (AC or DC) on the WA4 block coil (the coil is not designed to be perma-
nently energized)
• manually by pressing the pushbutton on the front face of the WA4 block.
Mounting
The WA4 block is clipped onto the front face of the 1-stack contactor where it takes up two slots in
central position (see fig. below).
The two other slots may accept CA4 single pole auxiliary contacts (1 block on each side of the
mechanical latch).
E1
Additional CAL4 can be fitted on the side of the contactor in respect to the total number of
A1 E2 built-in or additional N.O. and N.C. auxiliary contacts as described in the accessory fitting details
part of each contactor type.
A2 For contactors and Rated control circuit Type Order code Pkg Weight
Wiring diagram contactor relays voltage Uc qty (1 pce)
V AC 50/60 Hz V DC kg
AF09 ... AF65, 4-pole NF 24...60 24...60 WA4-11 1SBN040100R1011 1 0.080
48...130 48...130 WA4-12 1SBN040100R1012 1 0.080
100...250 100...250 WA4-13 1SBN040100R1013 1 0.080
250...500 250...500 WA4-14 1SBN040100R1014 1 0.080
AF80, AF96 24...60 24...60 WA4-96-11 1SBN040200R1011 1 0.080
48...130 48...130 WA4-96-12 1SBN040200R1012 1 0.080
100...250 100...250 WA4-96-13 1SBN040200R1013 1 0.080
250...500 250...500 WA4-96-14 1SBN040200R1014 1 0.080
Mechanical latching unit for 24 V DC - 500 mA PLC control
AF09 ... AF38, 4-pole NF – 24 WA4-10 1SBN040100R1010 1 0.080
Note: For WA4 accessory use with contactor or contactor relay coil 30, please consult your ABB local sales organization.

B
For contactors and A B
10
0.39" contactor relays mm in. mm in.
AF09 ... 16(Z)-30-.. 45 1.77" 133.5 5.25"
AF09 ... 16(Z)-40/22-00
NF(Z)
AF26 ... 38(Z)-30-00 45 1.77" 142.5 5.61"
41
1.61" AF26 ... 38(Z)-40/22-00 45 1.77" 157.5 1.77"
AF40 ... 65-30-00 55 2.16" 167 6.57"
AF40-40/22-00 70 2.75" 170 6.70"
3 AF52-40-00 70 2.75" 170 6.70"
0.12"
60 2.36" AF80, 96-30-00 70 2.75" 172 6.77"
A 5.5 0.22" AF80-40/22-00 90 3.54" 172 6.77"
1SBC100204S0201
WA4 + AF09 ... AF96, NF 1-stack
Main dimensions mm, inches