Gewiss GW 96 769 Mode D'emploi page 2

Instructions for Mounting and Installation of the Undervoltage
1. Function and Description:
The undervoltage releases type GW 96 769 - GW 96 770 are passive electromagnetic tripping relays which cause tripping of the connected switch
or protection switch in case of interruption or relevant downward deviation of the supply voltage. In this way the load or circuit is switched off at all
poles. interrupts the circuit virtually without delay, in order to prevent tripping in case of short-term interruptions.
Since electronic devices may be damaged not only by power failure but also by insufficient supply voltage over an extended period of time, the circuit
is switched off in case of a relevant voltage drop (typically to 30% of Un). Resetting is possible provided that at least 80% of Un is available, i.e. even
below the full rated voltage.
2. Indicator:
A mechanical voltage indicator provides information on the presence of the line voltage by means of blue/white colour change even if the closing
toggle of the connected switch is in OFF position. Blue means: tripped, no voltage. White means: voltage present
3. Installation:
Connect the undervoltage release from the left manual motor starter to which it is coupled while the respective switch is in the OFF POSITION and
press it completely onto its lateral surface positioned by the guide sleeves. Use the two screws in the USA/USD to establish the mechanical
connection to the switch. In doing so, make sure that the coupling pin is carefully introduced into the kidney-shaped switchopening and into the joint
component located inside the switch without using force (Fig. 1).
4. Service button:
For testing purposes (wireing check) the coupled switch can be switched ON even without line voltage feed to the undervoltage release if the service
button remains pressed deep down permanently. When releasing the service key, the switch qutomatically reverts to the OFF positon
5. Electrical Data:
Rated voltage
Maximum operating voltage
Rated impulse withstand voltage mind.
Power loss at rated voltage
Tripping typically at
Switching ON possible typically at
Tripping delay, typically
Permissible ambient temperature
6. Mechanical characteristics:
Dimensions
Terminal capacity
Terminal type
Terminal screws
Terminal torque min.
7. Applications:
• To prevent dangerous machines, conveyors, hoists, etc. from self-starting after line voltage interruption.
• To protect electrical devices and machinery from operation at relevant undervoltage.
• For monitoring of all outer conductors of a three-phase AC system the break contact of a voltage control relay may be connected in series to the
undervoltage release - see connection diagram.
• For centralized switchoff functions including emergency switch off, the use of passive (static current) tripping circuits is recommandet by far more
secure than active remote switchoff, e.g. by means of electromagnetic shunt trip release. In case of a passive tripping circuit will only the line
interruption lead to switchoff thus ruling out any danger. In case of line break, a shunt trip release would not work any more and therefore could
not activate emergency switch off (Fig. 2).
8. Notes:
If despite taking into account the instructions for installation, no satisfactory result is achieved, the device may be defective and should be forwarded
to the supplier. Do not attempt to make any repairs on your own.
This would invalidate our warranty.
Mode d'emploi de la bobine à manque de tension
1. Description et fonction:
Les bobines à manque de tension de type GW 96 769 et GW 96 770 sont des dispositifs passifs de coupure à relais électromécaniques. Elles
permettent la coupure multipolaire de circuits en cas de chute de tension notoire ou de coupure de réseau à l'aide d'interrupteurs ou de disjoncteurs
associés.
Le module d'èclenche façon instantanée, afin d'èviter les déclenchements intempestifs relatifs à des micro-coupures.
Les coupures secteurs ne sont pas les sculcs causes de dommages d'appareils électroniques et d'installations électriques. En effet, leur sous -
alimentation prolongée ou une baisse continuelle de la tension à leurs bornes peuvent également être préjudiciable. Dans ces cas lors d'une chute
de tension notoire (30% de U nominale), une coupure s'impose. Le réarmement sera possible à partir d'un seuil inférieur à la tension nominale (80%
de U nominale).
2. Indicateur d'ètat:
Un indicateur mécanique d'état (bleu/blanc) renseigne sur la présence de tension même en cas de blocage de la manette solidaire de l'interrupteur.
bleu signifie: coupure ou manque de tension
blanc signifie: présence de tension
115, 230 or 400 V 50 Hz
120, 240 or 415 V 50 Hz
4 kV
3 VA
0.4 to 0.5 x rated voltage
0.7 bis 0.8 x rated voltage
> 0.02 s
– 5 to +400C
1 module width
1 x 1 mm 2 up to max. 2 x 2,5 mm2 Ye and Yf with wire end sleeves
lift terminals
Pozidrive No. 2 captive screw
0.8 to max. 1 Nm