| Home > Trapped Key Interlocks > Mechanical Bolt Interlocks > KL - Multiple Key Bolt Interlock |
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| Description |
| The KL Lock is a key operated mechanical bolt interlock suitable for the control of electrical switchgear. The standard unit comes with a 15,88mm diameter bolt of variable length, that is used to control the rotation or movement of operating handles or toggles of electrical switchgear. Many suppliers of switchgear equipment have mounting kits available for Castell's interlocks. The lock is manufactured in brass or stainless steel making it ideal for use in harsh or corrosive environments. The KL bolt interlock is available in a double key or exchange key condition. |
| Operation |
| The Bolt Interlock range is used on control of switchgear to inhibit movement of cams, toggles or levers. |
| KL Bolt Interlock, Exchange Key Condition |
1. Key A is free, while key B is trapped and bolt is extended
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2. Insert and turn key A, then
turn key B to drive bolt, releasing key B
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3. Key B is free, key A is trapped and bolt is retracted |
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- While the side bolt is extended and key B is trapped, key A is free. The disconnector is locked.
- Inserting and turning key A in the bolt interlock enables you to rotate key B, releasing the mechanism. This will trap key A into the lock.
- Key A stays trapped while the bolt is retracted and key B is released.
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| KL Bolt Interlock, Double Key Condition |
1. Key A and key B are free,
bolt is extended |
2. Insert and turn both keys
to drive bolt |
3. Keys are trapped,
bolt is retracted |
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- While the side bolt is extended, key A and key B are free. The disconnector is locked.
- By inserting and turning key A and key B in the bolt interlock, you can retract the bolt, releasing the
disconnector. This will trap both keys into the lock.
- Both keys stay trapped while the bolt is retracted.
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| The length of the bolt can be varied to suit the application but travel of the bolt is always 19,05mm. The key is free when the bolt is extended. Insertion and rotation clockwise of the key will retract the bolt. The key will be trapped in bolt retracted position. |
| Application |
In a typical application for the KL, the electrical and pneumatic supplies to the machine are switched on and the access door to the hazardous area is locked closed.
Key B is trapped in the AV pneumatic switch. To enter the area, the pneumatic supply is turned to the off position and key B is released, locking the supply off.
The electrical supply is then turned off and key B is inserted and turned in the KL. This allows key A to be rotated and the bolt to be extended.The pneumatic and electrical supplies are now locked in the off position. Key A can be then inserted into an access interlock on the door.
While key B is out of the KL Bolt Interlock, the electrical supply key cannot be removed, ensuring that the power cannot be switched on while the access doors are open. |
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| Specifications |
| Temperature rating |
Minimum: -40°C [-40°F] ice free for Q & FS-Type
Maximum: 107°C [224,6°F] for Q-Type/140°C [284°F] for FS-Type |
| Type of mounting |
Ø7mm (brass), Ø8,35mm (stainless steel), Ø10,3mm (US standard brass/stainless steel) |
| Weight |
1,4kg for 1S version (see order information, page 5);
Add 0,4kg per additional portion |
| Material |
Brass/Stainless steel |
| MTTF Certification |
Available on request |
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| Order Information |
| 1. |
Lock portion type |
FS / Q (diagram 1) |
| 2. |
Material |
Brass / Stainless steel |
| 3. |
Number of lock portions |
1 secondary key (2 locks)
2 secondary keys (3 locks)
3 secondary keys (4 locks) |
| 4. |
L Dimension (bolt length when retracted) in mm |
0 / 6,4 / 12,7 / 19,1 / 25,4 |
| 5. |
Form |
1 / 2 / 3 / 4 (diagram 2) |
| 6. |
Key Condition |
double key condition / exchange key condition |
| 7. |
Lock portion symbols (inserting/withdrawing key) |
FS up to 3 digits / Q up to 6 digits |
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