Enclosure Electrical Interlocks

When an industrial control panel controls industrial machinery, and operates with a voltage more than 50 V AC / 60 V DC, each door of the control panel must be locked so that the door can only be opened when the disconnecting means is switched off. Door interlocking can either be mechanical or electrical, and must meet the following conditions. The interlocking must be activated automatically when closing the doors without additional measures. It must be possible for an authorize person to defeat the interlock with a tool so that the door can be opened for maintenance and service, with the main switch staying on. 

Hoffman PROLINE G2 Mechanical Interlocks utilize a ½ inch aluminum hex rod, which feeds through door actuators positioned at the top of the enclosure. The door-mounted activator brackets engage with the actuators, and the combination of the actuators and a hook and capture system, increases the safety by preventing system re-energization without closure of all secondary doors and the primary door. 

Hoffman Electrical Interlocks provide positive internal safety lockout on electrical enclosure while the equipment is energized. When energized, the interlocks prevent the door handle from being turned to open the door. 

Hoffman Electrical Interlock Defeaters enable authorized personnel to enter an enclosure while the enclosure equipment is energized. Defeaters are key-operated, momentary contact switches with contacts normally closed. Turning the key disengages the circuit to the electrical interlock. They can be used with ll 110/120 V Hoffman electrical interlocks.

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$196.30
Hoffman AEKDF Drip Shields Interlock Accessories
$101.92
The Mechanical Interlock solution and associated components have been redesigned to simplify installation and increase operator safety. The solution is based around a ½-in. (13 mm) Aluminum Hex Rod, which feeds through door actuators positioned only at the top of the enclosure(s). The door-mounted activator brackets engage with the actuator(s), also installed in series is a hook and capture system: the combination of actuator and hook increases safety by preventing system re-energization without closure of all secondary doors and the primary door. The components can be combined to safely interlock any number of enclosure configurations, including applications where a rear door or series of doors are present. Note that interlock components will work with all door options (solid single, overlapping double, window, and disconnect), mounting on the upper door bar near the center to provide maximum security. Consult installation instructions to determine which components would be required to safely interlock a defined solution.
$163.80
The Mechanical Interlock solution and associated components have been redesigned to simplify installation and increase operator safety. The solution is based around a ½-in. (13 mm) Aluminum Hex Rod, which feeds through door actuators positioned only at the top of the enclosure(s). The door-mounted activator brackets engage with the actuator(s), also installed in series is a hook and capture system: the combination of actuator and hook increases safety by preventing system re-energization without closure of all secondary doors and the primary door. The components can be combined to safely interlock any number of enclosure configurations, including applications where a rear door or series of doors are present. Note that interlock components will work with all door options (solid single, overlapping double, window, and disconnect), mounting on the upper door bar near the center to provide maximum security. Consult installation instructions to determine which components would be required to safely interlock a defined solution.
$127.14
The Mechanical Interlock solution and associated components have been redesigned to simplify installation and increase operator safety. The solution is based around a ½-in. (13 mm) Aluminum Hex Rod, which feeds through door actuators positioned only at the top of the enclosure(s). The door-mounted activator brackets engage with the actuator(s), also installed in series is a hook and capture system: the combination of actuator and hook increases safety by preventing system re-energization without closure of all secondary doors and the primary door. The components can be combined to safely interlock any number of enclosure configurations, including applications where a rear door or series of doors are present. Note that interlock components will work with all door options (solid single, overlapping double, window, and disconnect), mounting on the upper door bar near the center to provide maximum security. Consult installation instructions to determine which components would be required to safely interlock a defined solution.
$317.20
The Mechanical Interlock solution and associated components have been redesigned to simplify installation and increase operator safety. The solution is based around a ½-in. (13 mm) Aluminum Hex Rod, which feeds through door actuators positioned only at the top of the enclosure(s). The door-mounted activator brackets engage with the actuator(s), also installed in series is a hook and capture system: the combination of actuator and hook increases safety by preventing system re-energization without closure of all secondary doors and the primary door. The components can be combined to safely interlock any number of enclosure configurations, including applications where a rear door or series of doors are present. Note that interlock components will work with all door options (solid single, overlapping double, window, and disconnect), mounting on the upper door bar near the center to provide maximum security. Consult installation instructions to determine which components would be required to safely interlock a defined solution.
$215.80
The Mechanical Interlock solution and associated components have been redesigned to simplify installation and increase operator safety. The solution is based around a ½-in. (13 mm) Aluminum Hex Rod, which feeds through door actuators positioned only at the top of the enclosure(s). The door-mounted activator brackets engage with the actuator(s), also installed in series is a hook and capture system: the combination of actuator and hook increases safety by preventing system re-energization without closure of all secondary doors and the primary door. The components can be combined to safely interlock any number of enclosure configurations, including applications where a rear door or series of doors are present. Note that interlock components will work with all door options (solid single, overlapping double, window, and disconnect), mounting on the upper door bar near the center to provide maximum security. Consult installation instructions to determine which components would be required to safely interlock a defined solution.
$257.40
The Mechanical Interlock solution and associated components have been redesigned to simplify installation and increase operator safety. The solution is based around a ½-in. (13 mm) Aluminum Hex Rod, which feeds through door actuators positioned only at the top of the enclosure(s). The door-mounted activator brackets engage with the actuator(s), also installed in series is a hook and capture system: the combination of actuator and hook increases safety by preventing system re-energization without closure of all secondary doors and the primary door. The components can be combined to safely interlock any number of enclosure configurations, including applications where a rear door or series of doors are present. Note that interlock components will work with all door options (solid single, overlapping double, window, and disconnect), mounting on the upper door bar near the center to provide maximum security. Consult installation instructions to determine which components would be required to safely interlock a defined solution.
$332.80
Hoffman PMLFB Mechanical Interlock Front to Back Kit
$119.47
Hoffman PMLEK Mechanical Interlock Extention Kit
$304.20
Hoffman PMLSK Mechanical Interlock Door Slave Kit
$253.50
Hoffman PMLMAK Mechanical Interlock Master Door Activator Kit
$634.20
Hoffman PEK460NDH Electrical Interlock
$571.20
Hoffman PEK230NDH Electrical Interlock
$525.00
Hoffman PEK115NDH Electrical Interlock