This interlock type has the same key format as the rest of the HERPE locks, i.e. regular lock (N101 or I101), cabinet lock (N201 or I201), key selector (A402, etc.) or a solenoid commutator (CS701, etc.). Hence they all can be combined in the interlocking sequence.

In electrified premises without power, this interlock type prevents from manipulating any electric device (disconnector, switch, etc.) and leaving it open (doors, fences, etc.) until the manoeuvre is finished, i.e. when access is closed.

An HERPE lock is placed in an access gate (door, fence, etc.), implementing an interlocking sequence that can include a regular HERPE lock (ref.N101) on a switch or disconnector; a switchgear cabinet with an HERPE lock (ref.201); a solenoid commutator (ref.CS701) or a key selector (ref.A402), with the same key code as in the previous examples given. When the movable part of the access gate (door, fence, etc.) is open, the key stays trapped in the lock (ref.C301) and cannot be released until the gate is completely closed.

 Specifications

 Design