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Overload Relays for Machine Protection
Selection aid
2010
CA08103002Z-EN
www.eaton.com6/25
Selectionaid
Engineering
Terminal marking according to EN 50005
EMT6(-K), EMT6-(K)DB, EMT6-DBK
Auto
EMT6-(K)DB, EMT6-DBK
Manual
EMT6-DBK
Zero-voltage safe operation
LED display
Supply voltage present
Device has tripped
Device has tripped/short-circuit in
the sensor circuit
Sensor circuit
At R
K
≦ 250 Ω per sensor: 6 sensors, at R
K
≦ 100 Ω per sensor: 9 sensors in
the winding (provided by user), max. cable length to sensor 250 m (not
shielded);
Total PTC thermistor resistance ∑ R
K
≦ 1500 Ω
Sensor circuit characteristic values at U
s
and +20 °C
EMT6…
R
T1-T2
U
T1-T2
I
T1-T2
V DC max.
mA max.
T1, T2 short-circuited
-
1.9
4
kΩ
3
0.8
T1-T2 open
5.1
-
Functions that can be disconnected on the EMT6-DBK:
Function
Disconnection by link
Short-circuit monitoring
Y
1
-
Y
3
Zero-voltage safety
Y
1
-
Y
4
L +
h
h
N
U
S
A1
21 13
A2
T1 T2
22 14
PTC
Power
Tripped
Tripped LED
A1/A2
T1/T2
3.6
K
1.6
K
0
13–14, 21–22
+L
h
h
N
U
S
A1
21
A2
T1 T2
22 14
PTC
13
Y2 Y1
Power
Tripped
Tripped LED
A1/A2
T1/T2
3.6
K
1.6
k
0
13–14, 21–22
Y1/Y2, RESET
L +
h
h
N –
U
S
A1
21
A2
T1 T2
22 14
PTC
13
Y2 Y1
Y4 Y3
Power
Tripped
A1/A2
T1/T2
3.6
K
1.6
K
0
13–14, 21–22
Y1/Y2, RESET
Short-circuit
Tripped LED
60
750
1650
4000
12000
[
°C]
NAT
NAT
NAT
NAT NAT
–20
° –5°
+5° +15°
3600
Tripping
1600
Reset
Tolerance limits
Temperature
Resistance [ ]
Resetting
range
IEC-
Tripping range
EMT6