Siemens UL 1066, Operating Instructions Manual

Page: 205 / 334

12 – 8
12.8.1 MOC Versions
The MOC device may be ordered in two versions for drawout circuit breakers:
The auxiliary contacts, in the “Connect Only” version of the MOC, only change state when the circuit breaker is opened/closed while it

is in the “CONNECTED” position within the circuit breaker compartment. There are two distinct models of the “Connect Only” MOC, one

for circuit breaker frame size 2 (WLMOCC) and a second for circuit breaker frame size 3 (WLMOCC3).
The second version is known as the “Test and Connect” version. In the “Test and Connect” version, the auxiliary contacts change state

when the circuit breaker is opened/closed while it is in the “TEST” or “CONNECTED” positions within the circuit breaker compartment.

Like the “Connect Only” version, there are two distinct models of the “connect only” MOC, one for circuit breaker frame size 2 (WLMOC)

and a second for circuit breaker frame size 3 (WLMOC3).
12.8.2 MOC Installation Instructions
There are two MOC versions available: with and without a driver for the test position. The version with only one drive is generally used for
fixed-mounted circuit breakers.
- OPEN the circuit breaker and discharge the closing spring

(page 23-2)
- Remove circuit breaker from cradle

(page 23-3)
12.8.2.1 Installing the coupler
In order to interface the MOC assembly (mounted in the circuit breaker compartment), the circuit breaker must be outfitted with a

coupler (see Figure 1).
In order to install the coupler, the clear plastic plug in the sidewall of the circuit breaker (see Figure 2) must first be removed.

Facing the breaker, the plug is on right sidewall. This is easily accomplished by levering with a small screwdriver.
DANGER
Hazardous voltage.

Will cause death, serious personal injury, or equipment damage.
Turn off and lock out all power supplying this device before working on this device.
Figure 1
Figure 2