Engineering; Device Description; Current Ranges Of The Overload Relays - Eaton zeb XTOE Handbuch

2 Engineering

2.1 Device description

2 Engineering
2.1 Device description

2.2 Current ranges of the overload relays

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The ZEB electronic overload relays are three-pole electromechanical overload
relays with electronic release systems for overload monitoring. They are
suitable for the monitoring of AC current with a frequency of 50/60Hz.
The ZEB devices are not designed for use in hazardous areas. They can be
installed in non-hazardous area to protect the motors installed in hazardous
zones.
In the event of an overload trip, auxiliary contacts 95-96 and 97-98 switch and
interrupt the control circuit of the relevant contactor. In this way, they
indirectly disconnect the power flow of the monitored motor.
1 3 5 97 95
2 4 6 98 96
Figure 1: Switching symbol ZEB / XTOE / C440
The ZEB overload relays are set to the rated current of the motor by means
of a current setting dial.
The specialist personnel responsible for the installation shall refer the motor
name plate or the approval certificate of the motor while setting the overload
relay current.
Motors with a rated current of 0.33 to 175 A can be monitored with various
device types.
Table 1: Current ranges for ZEB12 relays
Type Current range I
A
ZEB12-1.65 0.33 - 1.65
ZEB12-1.65-GF 0.33 - 1.65
ZEB12-5 1 - 5
ZEB12-5-GF 1 - 5
ZEB12-20 4 - 20
ZEB12-20GF 4 - 20
ZEB (XTOE, C440) 11/16 MN03402007Z-DE/EN www.eaton.com