Yaskawa AC Drive Z1000 Bypass Technical Manual - Manual (Page 61)

3.4 Input and Output Power Wiring Connections
The input disconnect switch is located in the upper right hand side of the bypass. The three-phase input power connection is
made to the input terminals of the disconnect. Refer to Figure 3.9 for a representative example.
The Overload Relay (OLR) is mounted to the contactor assembly or back panel (depending on rating), just above the bypass
contactor. The Z1000 Bypass three-phase output power connection to the motor is made to the output terminals of the Overload
Relay.
C E
A
I
B
F
G
H
D
A – Drive output contactor K2
B – Motor overload relay
C – Motor connections
D – Input power terminals
E – Ground screw F – A2 bypass control board
G – 5 V bypass power supply board
H – 120 V control transformer
I – Bypass contactor K3
Figure 3.9 Bypass Circuit Components
u Factory Recommended Branch Circuit Protection
WARNING! Fire Hazard. Branch Circuit protection is required to be installed according to applicable local codes and the requirements listed
on the Z1000 Bypass nameplate. Failure to comply could result in fire and damage to the bypass and drive or injury to personnel. The Z1000
Bypass is suitable for use on a circuit capable of delivering not more than 100,000 RMS symmetrical amperes, 208 Vac and 480 Vac with
the circuit breaker option or when protected by class J or class L fuses as specified on the Z1000 Bypass nameplate.
Yaskawa recommends installing branch circuit protection according to maintain compliance with UL508C. Semiconductor
protective type fuses are preferred. Alternate branch circuit protection devices are also listed in this manual.
3.4 Input and Output Power Wiring Connections
YASKAWA ELECTRIC SIEP YAIZ1B 01D YASKAWA AC Drive – Z1000 Bypass Technical Manual 61
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Electrical Installation