Eaton Industrial Switchgear - xStart switching, protections and actuating motors

176 / 439

6/28 Overload relays
Selection criteria
2010 CA08103002Z-EN
for North America
SelectioncriteriaEngineering
Protection of single-phase and DC current motors:
1 pole 2 pole
ZE, ZB, Z5, ZW7
Mounting position:
ZE ZB12, ZB32, ZB65, ZB150, Z5
Tripping characteristics
These tripping characteristics are mean values of the spread at 20 °C ambient temperature in a cold state.
They show the tripping times in relation to the response current. When the devices are at operational temperature the tripping time of the overload
relay drops to approx. 25 % of the value shown. Specific characteristics for each individual setting range can be found in the manual on ￫Page 6/26
2h
100
60
40
20
10
6
4
2
1
40
20
10
6
4
2
1
0.6
ZB12, ZB32,
ZB65, ZE
1 1.5 2 3 4 6 8 1015 20
x Setting current
2-phase
Seconds
Minutes
3-phase
2h
100
60
40
20
10
6
4
2
1
40
20
10
6
4
2
1
0.6
ZB150
6 8 1015 20 3 4 1 1.5 2
x Setting current
2- phase
Seconds
Minutes
3-phase
2 h
100
60
40
20
10
6
4
2
1
40
20
10
6
4
2
1
1 1.5 2 3 4 6 8 1015 20
0.6
ZW7
Minutes
Seconds
x Setting current
Minimum
Maximum
2h
100
60
40
20
10
6
4
2
1
40
20
10
6
4
2
1
0.6
Z5
6 8 1015 20 3 4 1 1.5 2
x Setting current
2 phase
Seconds
Minutes
3 phase
forNorthAmerica
Adaption of ZW7 to smaller rated motor currents
Number of loops ZW7 -63 -90 -125 -160 -240 -290 -400 -540 -630
Rated motor current IN [A]
1 42-63 60-90 85-125 110-160 160-240 190-290 270-400 360-540 420-630
2 21-31,5 30-45 42.5-62,5 55-80 80-120 95-145 135-200 180-270 210-315
3 14-21 20-30 28.3-41,7 36.7-53,3 53.3-80 63.3-96,7 90-133,3 120-180 140-210
4 10.5-15,8 15-22,5 21.3-31,3 27.5-40 40-60 47.5-72,5 67.5-100 90-135 105-157,5
5 8.4-12,6 12-18 17-25 22-32 32-48 38-58 54-80 72-108 84-126