Page 600 - Motor_protection_and_control_Manual_motor_starters_ contactors

Mechanical latching units

Description
For converting standard contactors into latched contactors.
1SBC565483F0301 The WB75-A block contains a mechanical latching device with electromagnetic impulse unlatching (AC or
DC) or manual unlatching.
Captive screw type connecting terminals, built-in cable clamps, M3.5 (+,-) pozidriv 2 screw with screw-
driver guidance; delivered untightened and protected against accidental direct contact.
WB75-A Operation
After closing, the contactor continues to be held in the closed position by the latching mechanism should
the supply voltage fail at the contactor coil terminals.
Contactor opening can be controlled:
– electrically by an impulse (AC or DC) on the WB75-A block coil.
(the coil is not designed to be permanently energized)
– manually by pressing the pushbutton on the front face of the WB75-A block.
Mounting
The WB75-A block is clipped onto the front face of the 1-stack contactor where it takes up two slots. The
5 two other slots may accept CA5... single pole auxiliary contacts (1 block on each side of the mechanical
latch).
E2676D
E1 E2
Terminal marking Ordering details
For contactors Rated control circuit Type Order code Pkg Weight
voltage qty (1 pce)
Uc
V 50 Hz
or DC V 60 Hz kg
UA16 ... UA75, 24 24...28 WB75-A FPTN372726R1001 1 0.120
GA75, GAE75 42 42...48 WB75-A FPTN372726R1002 1 0.120
48 48...55 WB75-A FPTN372726R1003 1 0.120
110 110...127 WB75-A FPTN372726R1004 1 0.120
220...230 220...255 WB75-A FPTN372726R1006 1 0.120
230...240 230...277 WB75-A FPTN372726R1005 1 0.120
380...415 380...440 WB75-A FPTN372726R1007 1 0.120
415...440 440...480 WB75-A FPTN372726R1008 1 0.120

1SBC101526S0201 - Rev. B

5/400 | ABB