Crompton Controls DCM - Manual (Page 16)

Emotron AB 01-2120-01r2 Installation 15
5 Installation
The Emotron DCM may only be installed and commissioned by an authorized
person according to standard and local regulations. Pay special attention also to
the Safety chapter in this manual and the parts marked WARNING and CAU-
TION.
The Emotron DCM should be mounted on a standard DIN rail 46277,
35 mm. See “Technical Data” for maximum operating temperature range,
dimensions etc. Before installing, make sure that no voltage is applied to the
equipment and that the voltage rating of the Emotron DCM, as shown on the
rating plate on the side of the unit, corresponds to the motor/line voltage.
5.1 Choice of current transformer
Depending on pump motor size, the Emotron DCM should be used with one
or two current transformers. For pump motors with a rated current up to
100 A, use a single CTM current transformer. The possible combinations of
CTM current transformers and the number of windings are listed in Table 1.
Table 1 Table for selection of current transformer for motors with a rated current
up to 100 A
Rated motor
current
Choice of current transformer and number of windings for
different pump motor sizes.
CTM010 CTM025 CTM050 CTM0100
0.4 to 1.0 A 10
1.01 to 2.00 A 5
2.01 to 3.0 A 3
3.1 to 5.0 A 2
5.1 to 10 A 1
10.1 to 12.5 A 2 4
12.6 to 25 A 1 2
26 to 50 A 1
51 to 100 A 1