Superior Electric STABILINE WHR22 Series, Instructions Manual

Page: 6 / 26

6
6.0.
OPTIONS
6.1. NON DESIGNATED OPTIONS
6.1.1. Auxiliary Power Modules (A2)
These modules are provided on units where a 120 volt
AC source is required to operate internal circuitry. The
output voltage of these modules is on terminals 1 and 2
of the terminal strip. If there is no output on these
terminals check the two fuses mounted on the same
bracket. The output of the auxiliary power modules are
used to operate fans, trip or hold on circuit breakers,
and on any other applications where 120 volts is
required.
6.1.2. Fans
(B2)
On larger units fans are provided to help efficiently
remove heat generated in the cabinet. An auxiliary
power module supplies the fan operating voltage. If the
fans do not operate insure the auxiliary power module
output voltage is present.
6.2. MODEL NUMBER SPECIFIED OPTIONS
6.2.1. Circuit Breaker (CB1)
An input circuit breaker provides short circuit and
overload protection for the WHR Series Voltage
Regulators. Industrial circuit breakers with high
interrupting capacity are used. These breakers also
serve as an on/off switch for the regulator and any load
attached.
6.2.1.1. Shunt Trip (L1)
In unit where the model number designates the input
circuit breaker as “CS” the circuit breaker is equipped
with a shunt trip. A shunt trip causes the breaker to
open when voltage is applied to the shunt trip coil. The
trip coil is rated 120 volt, AC and is de-energized when
the breaker opens.
When alarm contact options and a circuit breaker trip
option are ordered together, the unit is furnished with
120 volt AC, auxiliary power module (A2) and the alarm
circuit contacts are wired to trip the input breaker. The
Shunt Trip Connections Diagram shows the typical
connections.
6.2.1.2. Under Voltage Trip (L1)
In unit where the model number designates the circuit
breaker as “CR” the circuit breaker is equipped with an
under voltage release coil. This coil allows the circuit
breaker to close when voltage is applied and opens the
breaker if the coil voltage is lost. The trip coil is rated
120 volt, AC. The coil voltage must be present in order
to close the circuit breaker.
6.2.1.3. Circuit Breaker Trip Coil & Alarm Contacts
When alarm contact options and a circuit breaker trip
option are ordered together, the unit is furnished with
120 volt AC, auxiliary power module (A2) and the alarm
contacts are wired to trip the input breaker. A
momentary switch is provided to override any alarm
activation that would trip the circuit breaker. This allows
turn on of the system and alarm options to reset. Hold
switch in while turning on the circuit breaker. Alarm
options include frequency meter and input voltage
range alarm.
The following connection diagrams show typical shunt
trip and under voltage release circuits. Circuit shown is
has a 3 pole circuit breaker but it would be the same for
a 2 pole circuit breaker.
Shunt Trip Under Voltage Release
If you do not want the alarm contacts to trip the input
breaker, the unit can easily be re-configured.
Disable the alarms from tripping a shunt trip coil,
remove the 120 volts supplied by the auxiliary power
module to energize the coil. Removing the wires from
A2-TB1 terminals 1 and 2 that connect to the alarm
switches and TB2 does this. Do not disconnect any
other devices from this source.
Disable the alarms from tripping an under voltage trip
coil, by suppling the 120 volts directly to the coil without
going through the alarm contacts. Move the wire on
TB2-3 that comes from the auxiliary power module to
TB2-2 to accomplish this.
6.2.2. Delayed Output (A5, K2)
The delayed output option allows time for the power to
stabilize
before energizing the load. This is
accomplished by adding a contactor and timer to the
regulator. When the regulator is initially energized: the
timer starts. After the preset time delay the contactor
automatically closes energizing the load. The time
delay is field adjustable from approximately 5 to 30
seconds and factory adjusted to approximately 10
seconds when shipped.
6.2.3. Manual Bypass Switch
(S3)
This two-position switch, in the REGULATOR position,
provides conditioned power from input source through