Personnel Lifts

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Powering a lift with a three phase converter requires special consideration. In the first instance there are several questions that need to be asked of the lift manufacturer:

1. What is the total power consumption at the maximum load point, including all power consuming elements but excluding additional power for motor starting ?

2. Please list loads that are connected phase to neutral, stating which phase is used in each case.

3. What is the maximum power for standby battery charging ?

4. What % imbalance in the three phase-to-phase voltages is acceptable ?

5. When regenerating power back to the 3-phase supply, what is the maximum acceptable supply imbalance, voltage / current / impedance ?

6. When starting the phase converter from lift demand (the button), are there separate relays / contactors for single phase input and 3-phase output and is there a time delay between them ?

7. When the 3-phase converter detects low voltage (phase L2 to L3) and supplies momentary 'boost' for starting, what is the tolerance on momentary low and high voltages ?

Once you have established all of this information please contact our technical team on 01258 837 266 to discuss your options as a custom solution may be required.