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Motor Protection
Tripping times for ZEV electronic motor-protective relay
Tripping class, can be selected 5 10 15 20 25 30 35 40
Tripping time in s (± 20 %) With 3-pole symmetric loading from cold state
Setting current IE x 3 11.3 22.6 34 45.3 56.6 67.9 79.2 90.5
Recovery time after trip
x 4 8 15.9 23.9 31.8 39.8 47.7 55.7 63.6
x 5 6.1 12.3 18.4 24.6 30.7 36.8 43 49.1
x 6 5 10 15 20 25 30 35 40
x 7.2 4.1 8.2 12.3 16.4 20.5 24.5 28.6 32.7
x 8 3.6 7.3 10.9 14.6 18.2 21.9 25.5 29.2
x 10 2.9 5.7 8.6 11.5 14.4 17.2 20.1 23
Class 5 10 15 20 25 30 35 40
trecovery after overload trip [min] 5 6 7 8 9 10 11 12
trecovery after test button trip [sec] 5 5 5 5 5 5 5 5
Tripping characteristics:
These tripping characteristics are mean values of the spread at 20°C
ambient temperature in a cold state. Tripping time depends on response
current. With devices at operating temperature, the tripping
time of the overload relay reduces to approximately 25% of the read
off value.
Thermistor tripping
Rated trip resistance R = 3200 Ω ± 15%
Recovery resistance R = 1500 Ω ± 10%
Total PTC thermistor resistance ∑ RK ≤ 1500 Ω
at RK ≤ 250 Ω per sensor: 6 sensors
at RK ≤ 100 Ω per sensor: 9 sensors
Ready to respond after trip at 5 °C under response temperature
B22 moellerNA.com STARTER-CAT-USA-1206
Seconds Minutes
2h
100
15
10
5
2
1
ZEV 3-pole
CLASS 40
35
30
25
20
20
10
7
15
5 10
3
CLASS 5
2
11
2 3 4 5 6 78910 x Setting current
Electronic Overload Relays
With a phase failure
or unbalance > 50%,
the ZEV will trip
within 2.5 seconds.
EC prototype test certification number:
ZEV PTB 01 ATEX 3233
Selection Aids
For protection of motors in EEx e area, also order AWB2300-1433G
“ZEV motor-protective system, Overload monitoring of motors in
EEX e areas”.
For Immediate Delivery call KMParts.com at (866) 595-9616