DOC-MC950-INS-0001-12 MultiCube 350/650/950 mV Installation Guide Page 2
4 Standard Connections
4.1 Current Transducers
Only current transducers which meet the manufacturer’s specifications should be used.
Current Transducer (CT) connections are not galvanically isolated from the voltage inputs and
must therefore not be accessible to the operator after installation. Installed CT cables and any
extensions to these, must not be accessible to the operator.
Minimum Current Transducer Specification:
Input Current Range: 0 to 1.2 In (In = nominal rated current in amps)
Output Voltage: 0.333Vac (at nominal current)
Insulation: 2.2kV Case to Secondary
If long current transducer secondary cables are used care must be taken to avoid pickup of electrical interference. With
suitable low capacitance screened cables, the cable can be extended to 100m (328ft) or more.
4.2 Current Transducer Connections
4.2.1 RJ12 Current Cables
Connection between the meter and each 3-Phase set of current transducers is made using
oRJ12 to RJ12, 6P6C cable:
oCrossover Type PIN 1-6; 2-5; 3-4; 4-3; 5-2, 6-1.
Current cables must be rated for safe use in the electrical enclosure which houses the meter
(e.g. UL1015) and must meet the following minimum specification: Temperature: 105C
(221F); Insulation 300Vac.
4.2.2 Current Transducers
Only current transducers supplied by the manufacturer may be used in conjunction with MultiCube meters. The following list of UL &
CE recognised current transducers has been approved for use.
5, 10, 30, 50, 75, 100, 150, 200Amps
19.1 x 19.1mm(0.75” x 0.75”)
75, 100, 150, 200, 300, 400, 600Amps
31.8 x 31.8mm (1.25” x 1.25”)
100, 200, 300, 600, 800, 1000, 1500Amps
50.8 x 50.8mm (2.0” x 2.0”)
5, 10, 30, 50, 70, 100, 150, 200Amps
19.1 x 19.1mm(0.75” x 0.75”)
50, 70, 100, 150, 200, 250, 300, 400, 600Amps
31.8 x 31.8mm (1.25” x 1.25”)
100, 200, 300, 400, 600, 800, 1000, 1200, 1500Amps
50.8 x 50.8mm (2.0” x 2.0”)
400, 600, 800, 1000, 2000, 3000Amps
127.0 x 76.2mm (5.0” x 3.0”)
4.2.3 Current Transducer connection.
The current transducers should be connected to the instrument before the power is applied. The auto detect mechanism
detects the transducer on power up of the instrument.
4.2.4 Current Transducer auto detect.
The instrument is designed to automatically recognise the primary current, and other characteristics, of approved current
transducers.
