Why Additional Locks on Electric Shutters Need Careful Consideration

What’s the Problem With Manual Locks on Electric Shutters?

We frequently attend call-outs where a shutter has stopped working or suffered damage because an additional manual lock was left engaged. Here’s what typically happens:

Staff lock up at night, adding a padlock or bolt to the shutter for extra security.

In the morning, someone forgets the lock is there and presses the button to open the shutter.

The motor strains against the locked curtain, causing the shutter to jam, the curtain to buckle, or, in the worst cases, the motor or barrel to break.

This kind of damage can lead to expensive repairs, unnecessary downtime, and even void your warranty.

Why Is This So Dangerous?

Mechanical Damage: Electric shutters are designed to move freely. An engaged manual lock creates a solid obstruction. When the motor tries to lift the shutter against this resistance, it can shear slats, twist the curtain, snap fixings, or burn out the motor.

Safety Hazard: A forced or broken shutter can drop suddenly or become unstable, posing a risk to staff and passers-by.

Costly Repairs: The resulting damage often requires more than just unlocking the shutter—it can mean replacing motors, barrels, or entire curtain sections.

The Right Way: Always Use an Isolator With Additional Locks

If you feel your premises require extra locking devices beyond the built-in security features of your electric shutter, it’s absolutely essential to fit an electrical isolator switch for those locks.

What Is an Isolator Switch?

An isolator is a safety switch installed on the shutter’s control circuit. When activated, it completely disconnects electrical power to the shutter motor, preventing any attempt to operate the shutter until the isolator is switched off. This ensures that the shutter cannot be moved while a manual lock is still engaged.

How Does This Prevent Damage?

Failsafe Operation: The isolator acts as a reminder and a physical barrier—if the lock is on, the isolator should be switched off, making it impossible to accidentally activate the shutter.

Staff Safety: Staff must physically remove the lock and reactivate the isolator before the shutter will respond, greatly reducing the risk of accidental damage or injury.

-Compliance: Many insurance providers and health & safety guidelines recommend (or require) this setup for any electric shutter with a separate manual lock.

Best Practice for Enhanced Shutter Security

If you’re considering adding extra locks to your electric shutter, follow these steps:

1. Consult a Professional: Always seek advice from a qualified shutter engineer before modifying your shutter system.

2. Install an Isolator: Ensure a certified electrician or shutter specialist fits an isolator switch that is clearly labelled and located near the shutter controls.

3. Staff Training: Make sure all staff are trained on the correct locking and unlocking procedures, including the use of the isolator.

4. Routine Checks: Include the lock and isolator in your regular maintenance and safety checks.

Don’t Risk It—Get It Done Right

If you already have additional locks fitted to your electric shutter and no isolator in place, we strongly recommend arranging a site inspection. Our engineers can advise on the safest and most compliant way to upgrade your setup, helping you avoid unnecessary breakdowns and costly repairs.