ABB ACH550-UH User Manual

ACH550 E-Clipse Bypass User’s Manual 2-239
Technical data
Technical data
Input power connections (supplement to ACH550-UH User’s Manual)
Branch circuit protection
Input power is connected to the ACH550 with E-Clipse Bypass through a door
interlocked disconnect switch or circuit breaker. Neither of these inputs are fused.
The branch circuit that provides power to the ACH550 with E-Clipse Bypass with
disconnect switch must include appropriate motor branch circuit protective devices
to provide short circuit and ground fault protection for the motor in the bypass mode.
When connected to a 480 VAC power source, the ACH550 with E-Clipse Bypass
with the circuit breaker option is suitable for use on a circuit capable of delivering not
more than 100,000 RMS symmetrical amperes. When connected to a 240 VAC
power source, the ACH550 with E-Clipse Bypass with the circuit breaker option is
suitable for use on a circuit capable of delivering not more than 100,000 RMS
symmetrical amperes.
Fuses
NOTE: Although fuses listed are similar in function to fuses listed in the ACH550-UH
User’s Manual, physical characteristics may differ. Fuses from other manufacturers
can be used if they meet the ratings given in the table. The fuses recommended in
the table are UL recognized.
Drive input fuses are provided to disconnect the drive from power in the event that a
component fails in the drive’s power circuitry. Since fast-acting fuses are provided,
the branch circuit protection will not clear when the drive input fuses blow. If the drive
input fuses blow, the motor can be switched to Bypass without replacing fuses or
resetting a circuit breaker. The drive’s electronic protection circuitry is designed to
clear drive output short circuits and ground faults without blowing the drive input
fuses. Drive input fuse specifications are listed in the following tables.
Fuses with higher current rating than the recommended current rating must not be
used. Fuses of the same class with lower current rating may be used.
208…240 volt fuses
208… 240 Volt
Frame
Size
Drive Input Fuse Ratings
HP Identification
1
Amps
(600V)
Bussmann
Type
1 ACH550-xxR-04A6-2 R1 15 KTK-R-15
1.5 ACH550-xxR-06A6-2 R1 15 KTK-R-15
2 ACH550-xxR-07A5-2 R1 15 KTK-R-15

ABB ACH550-UH Specifications

General

Brand	ABB
Model	ACH550-UH
Category	Controller
Language	English