System information

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Masterpact™ NT and NW Universal Power Circuit Breakers
Accessories
58
05/2014
Circuit Breaker Locking and Interlocking
Lockable Push Button Cover
A transparent cover blocks access to the push
buttons used to open and close the device. It is
possible to independently lock the opening button
and/or the closing button. The push buttons may
be locked using:
• One to three padlocks: 3/16” to 5/16”
diameter, not supplied
• Wire seal
• Two screws
Open Position Padlock and Key Lock Provisions
The circuit breaker is locked in the off position by physically
keeping the opening push button pressed down using one of the
following:
• One to three padlocks: 3/16” to 5/16” diameter, not supplied.
• Key locks: One or two Kirk
®
key locks (keyed alike or
differently) are available for UL Listed/ANSI Certified circuit
breakers; for IEC Rated circuit breakers, Ronis, Castell, or
Profalux key locks are available. (Masterpact NT circuit
breakers may have only one key lock on the circuit breaker.)
Keys may be removed only when locking is effective. The key
locks are available in any of the following configurations:
• One key lock
• One key lock mounted on the device plus one identical key
lock supplied separately for interlocking with another device
• Two different key locks mounted on the circuit breaker for double locking
A locking kit for installation of one or two key locks may be ordered separately.
Table 53: Circuit Breaker and Switch Locking Options
Type of Locking Maximum Number of Locks
Pushbutton Locking Using padlocks Three padlocks
Open Position Locking
Using key locks Two key locks (optional)
Using padlocks and key locks Up to three padlocks and two key locks (optional)
Push Button Lock
Open Position Key
Lock (NW)
Open Position Padlock
Provision (NW)