Q9 Plus Bypass ASD/Bypass Box Installation and Operation Manual
13
Theory of Operation
The
Q9 Plus Bypass ASD/Q9 Plus Bypass Box
system is available in three primary
configurations. The system configuration type is defined by the suffix
A
,
C
, or
E
as shown in the
part numbering convention on
.
The description below targets the
E
configuration. System operation for the
A
and
C
types differ
from the
E
type where the referenced function is not supported by the
A
or
C
typeform.
Note:
Reference
and
for the following explanation.
Note:
The 200-volt 30 HP and 40 HP systems are designed with the ASD component and
the Bypass Box provided and mounted as separate items (e.i., the ASD is sold
separately; see
). The same is true for the 400-volt 50 – 125
HP systems.
The Integrated Enclosure and the BYP Series systems operate in the same manner
— as described below.
Initially, all switches are open and the normal states of all relays are as indicated in
.
Stage 1 Function
Power is applied in Stage 1 via the
Control Power Transformer
(CPT). The 120 VAC signal is applied
to the
Shunt Trip
circuit and
LED 5
(Control Power).
LED 5
illuminates, and if the
LS
switch is open
(enclosure door is closed), the system is enabled for normal operation.
If the
LS
switch is closed (enclosure door is open), the
Motor Circuit Protector
(MCP) is opened via
the
Shunt Trip
function (see
), and the three-phase input voltage to the
system is terminated. The
LS
switch may be connected to an ancillary circuit that can perform a system
shutdown in the event of a system malfunction or an ancillary circuit status change (e.g., door opens,
over temp, etc.). The
LS
switch is used as a door interlock in this example.
Stage 2 Function
Stage 2 has two operating modes:
Test
operation and
INV
operation (
K2
energized).
If the
Test
switch (SW1) is closed or if
K2
is energized via
SW2
(SW2 to INV, OL closed [open =
overload], and CIA-to-B closure required), the
K1
relay is energized and the states of the
K1
contacts
change.
LED1
illuminates (if in the Test mode) and the
1M
contactor energizes, which closes the
1M
contacts
(three-phase power is applied to the ASD input; see
Stage 3 Function
The closures of the
OL
contacts of the motor overload relay and the
CIA/B
(Customer Interface)
contacts are required to provide 120 VAC to Stage 3.
The
CIA/B
contacts are configured by the user such that the system is disabled in the event that any
user-selected function should undergo a state change (i.e., alarm is initiated, door is opened, etc.).
CIA/B
contacts may be jumpered if unused.
Summary of Contents for Q9 Plus ASD
Page 5: ...TM Q9 Plus Bypass ASD Bypass Box INSTALLATION OPERATION MANUAL June 2013 DN 68251 000 ...
Page 61: ...Q9 PLUS ASD LOW VOLTAGE DRIVE ...
Page 65: ...S15 ASD LOW VOLTAGE DRIVE ...
Page 80: ...E6581611 iv 15 Warranty O 1 16 Disposal of the inverter P 1 ...
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