Quik-Drive tap-changers
Eaton offers three Quik-Drive tap-changer models (see
Figure 20, Figure 21, and Figure 22). Each device is sized
for a specific range of current and voltage applications and
share many similarities in their construction. The primary
benefits of Quik-Drive tap-changers are: direct motor drive
for simplicity and reliability; high-speed tap selection for
quicker serviceability; and proven mechanical life (one
million operations). Quik-Drive load tap-changers meet
IEEE
®
and IEC standards for mechanical, electrical, and
thermal performance.
Common Quik-Drive tap-changer features
Neutral Light Switch – A switch is triggered to close by
the Reversing Switch Assembly or the Main Contact
Assembly to indicate to the Control that the tap-changer
is in the Neutral position.
Holding Switch – A common holding switch assembly
driven by a pinion cam seals in motor power during a
tap-change until the operation is complete.
Position Indicator Drive – A common indexing mechanism
is shared between the tap-changers for driving the
Position Indicator.
Safety Switches – In addition to the limit switches in the
Position Indicator, microswitches are employed on the
tap-changers to interrupt power to the motor so that they
cannot be powered beyond the 16 Raise or 16 Lower
positions. These Safety Switches are triggered by a cam
that is driven from the Main Contact Assembly.
Logic Switches (Back-Off Switches) – The Logic Switches
are used in parallel with the Safety Switches, based on
the polarity of the Reversing Switch, to ensure proper
operation of the tap-changer.
Figure 20. QD3 Quik-Drive tap-changer
Figure 21. QD5 Quik-Drive tap-changer
Figure 22. QD8 Quik-Drive tap-changer
19
VR-32 and EVER-Tap™ Voltage Regulator
InstallatIon, operatIon, and MaIntenance InstructIons MN225008EN June 2020
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