EM TEST coupling NX series, Руководство пользователя

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EM TEST coupling NX
Manual of operation V 1.03 30 / 53
7.3. DC current capability of coupling NX devices
Coupler models with a built in ac mains contactor have a reduced dc switching capability. This current rate
depends on the following parameters:
- contactor model, applied dc voltage and time constant L/R of the dc circuit
coupling NX with rated power 3x480V 16 A / 32 A
dc time constant dc current capability
DC-
1 L/R ≤ 1ms
24 V DC 40 A
48 V DC 23 A
60 V DC 18 A
110 V DC 8 A
220 V DC 1 A
DC-
3 L/R ≤ 2ms
24 V DC 19 A
48 V DC 10 A
60 V DC 5 A
110 V DC 1.8 A
220 V DC 0.3 A
coupling NX with rated power 3x480V 63A / 125A
dc time constant dc current capability
DC-
1 L/R ≤ 1ms
24 V DC 50 A
48 V DC 50 A
75 V DC 50 A
110 V DC 8 A
220 V DC 6 A
DC-3 - DC-5 L/R < 2ms
24 V DC 35 A
48 V DC 25 A
75 V DC 25 A
110 V DC 3 A
220 V DC 1 A
Coupling NX with rated power 3x690V 63A / 125A
dc time constant dc current capability
DC-
1 L/R ≤ 1ms
< 75 V DC 220 A
110 V DC 110 A
DC-3 - DC-
5 (L/R ≤ 15ms)
< 75 V DC 160 A
110 V DC 80 A
Coupling NX with rated power 3x690V 200A
dc time constant dc current capability
DC-
1 L/R ≤ 1ms
< 75 V DC 350 A
110 V DC 160 A
DC-3 - DC-
5 (L/R ≤ 15ms)
< 75V DC 280A
110V DC 150A
Categories for DC application
The IEC 60947-4-1 rating system is broken down into different utilization categories that define the value of the
current that the contactor must make, maintain, and break.
DC-1
Non inductive or slightly inductive loads, resistance furnaces, heaters
DC-3 Shunt motors, starting and breaking of a shunt motor during inching or plugging. The time constant
shall be less than or equal to 2 msec. On de-energization, the contactor will break around 2.5 times the
starting current at a voltage that may be higher than the line voltage.
DC-5 Series-motors, starting and breaking of a series motor during inching or plugging. The time constant
being less than or equal to 7.5 msec. On energization, the contactor sees about 2.5 times the nominal
full load current. On de-energization, the contactor breaks the same amount of current at a voltage
which can be equal to the line voltage.
This list is not complete. For more information refer to specific manuals of the contactor manufacturers.