Emotron CDU/CDX 48-008 [70/82] Emotron dsv 5445 5444

EMOTRON DSV 5445/5444

Page 70

 Emotron 21.04.09

12 Option link circuit terminals for emergency evacuation and power

recovery

12.1 Emergency evacuation using battery

A nominal battery voltage of approx. 240 V DC is recommended. A battery capacity according to the

following rule of thumb is recommended: Device nominal current / 10 = capacity of the battery in Ah. I.e.: A

DSV 5445 - 20/400 requires a 240 V DC, 2 Ah battery. The device is equipped with a flat-battery monitor so

that the battery is not overloaded. It is important that the battery is isolated from the ZK terminal (terminal 24

or 25) by means of a diode in the plus line, since the battery would otherwise be overloaded in generation

mode. It must be ensured by means of an interlocking contactor that the 400 V mains and the battery can

never be connected to terminal 24 (plus) and 25 (minus) simultaneously. The programs based on 7SZ

possess an input E1, which must be present together with the application of the battery voltage, so that the

otherwise effective phase-fault detection is suppressed. With some controllers, a small diode must also be

connected externally from E1 (anode) to the drive step Ve or Vn or Vi (cathode), so that the run can start

immediately after the activation of ISP and inputs E0 and E1. The run can even be started quite normally

with many controllers when only the smallest run step V1 is selected. The battery can normally evacuate up

to 10 stops. Important: The order must contain details whether the device should support emergency

evacuation (the hardware is then equipped with this option). Battery cubicles are available, for example, from

Weber-Steuerung.

12.2 Emergency evacuation using UPS device instead of 240 V battery

UPS systems (e.g. from APC) are an alternative method to the above concept with a battery cubicle. The

advantage is that, the USP simultaneously provides the 230 V sinusoidal system for the remaining controls

and therefore the lift controls, 12 V and 24 V power units as well as the contactor solenoids and brake

magnets continue to be supplied with normal voltages, thus reducing the cost of emergency evacuation to a

very low value. Furthermore, the charging state of the USP need not be checked (this is done automatically).

Only a reactor is necessary (starting current limitation) and a high-blocking capability bridge rectifier (ZK

rectification incl. Isolation) to simultaneously provide the DC voltage (approx. 320 V) for the converter. Both

parts can be obtained from EMOTRON LIFT CENTER GmbH (also applies to a suitable high-quality USP).

The design of the USP can be made according to the following rule of thumb:

Nominal device current in ampere / 10 = USP power in kVA. This power is sufficient to reach the next stop

(independent of direction). The device allows only speed Ve or Vn in association with gearless drives. The

same measures as for the battery version apply with regard to protective interlocking. The 7SZ version is set

to emergency evacuation using input E1 (see also process above). With 3SZ, 9SZ and 10SZ, the

"emergency evacuation" flag must be "0" so that a phase fault is not detected.

Please note: Emergency evacuation using the USP system functions only with "new" motors. Old systems

that still employ 2-speed original machines cannot be operated by this method, since the losses of such

Silumin machines are far too high.