GE AF-650 GP - Disconnectors, Circuit Breakers and Contactors

7.4 Disconnectors, Circuit Breakers and Contactors
7.5 Additional Motor Information
7.5.1 Motor Cable
The motor must be connected to terminals U/T1/96, V/T2/97, W/T3/98. Earth to terminal 99. All types of three-phase asynchronous standard motors can be used
with a frequency converter unit. The factory setting is for clockwise rotation with the frequency converter output connected as follows:
Terminal No.
Function
96, 97, 98, 99 Mains U/T1, V/T2, W/T3
Earth
• Terminal U/T1/96 connected to U-phase
• Terminal V/T2/97 connected to V-phase
• Terminal W/T3/98 connected to W-phase
The direction of rotation can be changed by switching two phases in the motor cable or by changing the setting of par. H-08 Reverse Lock and reversing.
Unit Size 6X Requirements
Unit Size 61/63 requirements: Motor phase cable quantities must be multiples of 2, resulting in 2, 4, 6, or 8 (1 cable is not allowed) to obtain equal amount of
wires attached to both inverter module terminals. The cables are required to be equal length within 10% between the inverter module terminals and the first
common point of a phase. The recommended common point is the motor terminals.
Unit Size 62 and 64 requirements: Motor phase cable quantities must be multiples of 3, resulting in 3, 6, 9, or 12 (1 or 2 cables are not allowed) to obtain equal
amount of wires attached to each inverter module terminal. The wires are required to be equal length within 10% between the inverter module terminals and the
first common point of a phase. The recommended common point is the motor terminals.
Output junction box requirements: The length, minimum 2.5 meters, and quantity of cables must be equal from each inverter module to the common terminal
in the junction box.
7.5.2 Motor Insulation
For motor cable lengths ≤ the maximum cable length listed in the General
Specifications tables the following motor insulation ratings are recommen-
ded because the peak voltage can be up to twice the DC link voltage, 2.8 times
the mains voltage, due to transmission line effects in the motor cable. If a
motor has lower insulation rating it recommended to use a du/dt or sine wave
filter.
Nominal Mains Voltage Motor Insulation
U
N
≤ 420 V
Standard U
LL
= 1300 V
420 V < U
N
≤ 500 V
Reinforced U
LL
= 1600 V
500 V < U
N
≤ 600 V
Reinforced U
LL
= 1800 V
AF-650 GP Design Guide
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