Insulation Checks - ABB ACS 501 Installation & Start-Up Manual

Chapter 3 – Installation Instructions

Insulation Checks

3-12
Table 3-11 Resistor Values For 600V
hp Minimum Brake Resistor Value (Ω)
5 30
7.5 30
10 15
15 15
20 15
25 8.5
30 8.5
40 6
50 6
2. External Dynamic Braking Device. If the internal dynamic brake
chopper was not supplied and dynamic braking is required for the
application, an external dynamic braking chopper and resistor load bank
can be connected to the DC bus terminals.
WARNING! The brake control terminals carry a dangerous DC voltage
(1.35 x V ). No device other than an ABB Drives dynamic braking device
IN
may be connected to the positive and negative terminals of Terminal Block
X2.
WARNING! Do an insulation check of the motor wiring and the motor before
connecting the ACS 501 to line power. Before proceeding with the insulation
resistance measurements, check that the ACS 501 is disconnected from
incoming line power. Failure to disconnect line power could result in death or
serious injury.
1. Check that the motor wires are disconnected from the ACS 501 output on
Terminals U , V and W
2 2
2. Check that the motor wires are disconnected from the motor and remove
bridging connections at the motor.
3. Measure the insulation resistances of the motor. The voltage range of the
insulation resistance meter must be at least equal to the line voltage, but
not exceeding 1000 V. The insulation resistance must be greater than 1
megohm.
4. Measure the insulation resistance of the motor wiring between the phases
and between each phase and ground. The insulation resistance must be
greater than 1 megohm.
Peak Power (w)
20557
20557
37412
37412
48324
59236
73266
96648
96648
.
2
ACS 501 Installation & Start-up Manual
AveragePower (w)
10288
10288
18706
18706
24162
29618
36633
48324
48324