890CS & 890CD Common Bus Units
Page
4-10
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
8
9
10
11
A
B
C
D
1
2
3
4
5
6
7
E
Step 2: Connecting Power
In this section we are going to connect the 3-phase supply to the 890CS Common Bus Supply, and connect
the 890CD Common Bus Drive(s) via the DC link.
We'll also connect the mandatory AC line reactor, the motor, and the (optional) brake resistor.
WARNING
During commissioning, remove the fuses (or trip the circuit breaker) on your 3-phase supply.
Make sure the power is OFF, and that it cannot be switched on accidentally whilst you are working.
Solid-State Short-Circuit Protection
These devices provide Class 10 motor overload protection. The maximum internal overload proection level
(current limit) is 150% for 60 seconds in Constant mode. Refer to Appendix D: Programming - CURRENT
LIMIT for user current limit adjustment information.
An external motor overload protective device must be provided by the installer where the motor has a full-
load Ampere rating of less than 50% of the drive output rating; or when the MOTOR STALLED trip is
TRUE (TRIPS STATUS::DISABLED WORD 1>>MOTOR STALLED); or when the STALL TIME
parameter is increased above 480 seconds.
