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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
The Overload Relay (OLR) is mounted to the contactor assembly or back panel (depending on rating), just above the bypass
contactor. The bypass three-phase output power connection to the motor is made to the output terminals of the Overload Relay.
A – Ground screw
B – Input power terminals
C – Motor overload relay
D – Motor connections
E – Drive output contactor K2 (Type 1
only)
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 bypass nameplate. Failure to comply could result in fire and damage to the bypass and drive or injury to personnel. Bypass models
without soft-starter option PW are suitable for use on a circuit capable of delivering not more than 100,000 RMS symmetrical amperes, 208
Vac and 480 Vac. Bypass models D169 to D211 and B180 to B414 with option PW are also suitable for use on a circuit capable of delivering
not more than 100,000 RMS symmetrical amperes, 208 Vac and 480 Vac. Bypass models D024 to D143 and B011 to B156 with option PW
are suitable for use on a circuit capable of delivering not more than 65,000 RMS symmetrical amperes, 208 Vac and 480 Vac.
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.
YASKAWA SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual
3.4 Input and Output Power Wiring Connections
Figure 3.8
for a representative example.
A
I
H
F
G
F – Bypass contactor K3
G – 120 V control transformer
H – A2 bypass control board
I – 5 V bypass power supply board
Figure 3.8 Bypass Circuit Components
B
C
D
E
3
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