Electrical Installation; Ac Supply Requirements; External Braking Resistor - Emerson unidrive m300 Quick Start Manual

4

Electrical installation

An overlay of the electrical connections / terminals is included on the back page of this manual.
4.1

AC supply requirements

Voltage:
100 V drive: 100 V to 120 V ±10 %
200 V drive: 200 V to 240 V ±10 %
400 V drive: 380 V to 480 V ±10 %
Number of phases: 3
Maximum supply imbalance: 2 % negative phase sequence (equivalent to 3 % voltage imbalance
between phases).
Frequency range: 48 to 62 Hz
For UL compliance only, the maximum supply symmetrical fault current must be limited to 100 kA.
On the size 2 110 V drives or when connecting single phase to a dual rated 200 V unit, the
NOTE
supply should be connected to L1 and L3.
4.2

External braking resistor

Overload protection
When an external braking resistor is used, it is essential that an overload protection device
is incorporated in the braking resistor circuit; as shown in the electrical diagram on the
back cover.
WARNING
4.2.1 Minimum resistance values and peak power rating for the braking resistor
at 40 °C (104 °F)
Table 4-1 Braking resistor resistance and power rating (100 V)
Model
01100017
01100024
02100042
02100056
Unidrive M300 Quick Start Guide
Issue Number: 4
Minimum
resistance*
Ω
130
68
Instantaneous
power rating
kW
1.2
2.2
Continuous
power rating
kW
0.25
0.37
0.75
1.1
11