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2CV Series for 230 Vac Capacitor Start Motors and
2VR Series for 230 Vac Capacitor Start/Capacitor Run Motors
Basic Operation
Capacitor start/capacitor run motors and capacitor start motors provide continuous
voltage sensing information which can be used to extract speed data from the voltage
across the motor start (auxiliary) winding. By comparing this start (auxiliary) winding
RPM-sensitive voltage to the main AC input voltage (which serves as a reference
voltage), the switch determines when the start circuit should be de-energized. The
electronic switch interrupts the start circuit current after the motor has accelerated to the
cut out speed, and reconnects the start circuit whenever the motor speed has decreased
to a preselected cut in RPM level.
Capacitor start/capacitor run motors exhibit current transients and higher voltages
across the start switch. This electrical stress is due to the voltage differential which may
exist between the start and run capacitors at the instant of switch closure. This stress
phenomenon occurs with both mechanical and electronic type start switches. SINPAC
Switches have voltage detection circuitry to minimize the effects of these conditions.
Universal Design. 50/60 Hz operation.
Will work on 2, 4 or 6 pole motors of any
manufacturer. Reduced inventory.
Speed Sensitive
(cut in)
Environmentally Protected
Immune to moisture, dust, dirt,
shock and vibration.
Soldered Heat Sink
High cycling.
Line Voltage Compensation
Operating voltage 190 to 260 Vac.
Transient Protection
Transient protection tested per
IEEE C62.41 - 1991 Category A3.
Electrically Protected
Designed to filter out electrical noise, so there
is no concern of random switch malfunction.
Start Capacitor Discharge Resistor
Increase start capacitor life.
Zero Crossing Logic
Current spiking due to run
capacitor no longer a problem.
ADDITIONAL FEATURES
Silent Operation - no switch noise
Completely Solid-State with No Moving Parts. SINPAC
Switches have no physical constraints to affect their operation.
No wearing parts mean high cycling, no arcing contact.
Optional inductor for heavy duty operation.
Ambient 40 to 65C.
Operating Temperature: -40C to 65 C (-40 F to 149F) [for
operation between 65C and 85C (149F and 185F), consult
factory.]
Operating Voltage: 230 Vac SINPAC Switch: 190-255 Vac.
UL Recognition E71115and CSA Certification.
Dimensions are for estimating only. Drawings for customer reference are available upon request.
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Typical Full Load
Motor Nameplate
Current Rating (amps)
115
Volts
230
Volts
Switch Rating
and Permissible
Maximum Start
Capacitor
Current (amps)
3
3
17
17
35
35
230
230
2CV-35-260
2CV-35-310
4-7-22035-15-UC1
4-7-22035-15-U01
260
310
70
70
15
15
5
5
25
25
50
50
230
230
2CV-50-260
2CV-50-310
4-7-22050-15-UC1
4-7-22050-15-U01
260
310
70
70
15
15
3
3
17
17
35
35
230
230
2VR-35-260
2VR-35-310
4-7-72035-15-UC1
4-7-72035-15-U01
260
310
70
70
15
15
5
5
25
25
50
50
230
230
2VR-50-260
2VR-50-310
4-7-72050-15-UC1
4-7-72050-15-U01
260
310
70
70
15
15
Typical
Maximum
Motor hp
Start
Circuit
Voltage
Catalog
Number
Part Number
Cut Out
Voltage
Typical
Cut In
Voltage
Typical
Package
Style
Selection
Motor hp ratings are typical. For an accurate selection procedure, measure start
capacitor current during a normal start or at locked rotor and select a SINPAC
Switch with higher maximum current rating than that measured.
1. Be sure switch series matches motor type.
2. Be sure switch voltage rating matches auxiliary (start) circuit voltage rating.
3. Selection can be based on actual measurement of start capacitor current or
two times the motor nameplate FLA rating.
4. Switch current rating must match or exceed the motor start capacitor current
requirements. Always select a SINPAC Switch with the next higher current
rating for:
a) High cycling applications.
Line Voltage
Compensation Charts
Induced voltage across the start winding
is directly proportional to motor speed
and line voltage. All SINPAC Switches
use this voltage to switch the start
capacitor out of the circuit. Your motor
with a SINPAC Switch must generate a
voltage greater than the switch cut out
voltage to assure cut out of the start
capacitor. Refer to charts below.
260
260V
b) Long acceleration time.
c) High ambients: Greater than 55 C.
5. To assure proper motor operation, the voltage across the start winding must
reach the SINPAC Switch cut out reference voltage between 70% to 85% of
motors synchronous speed.
Line Voltage
240
200
Caution: SINPAC Switches are line voltage compensated. Changes in the line
voltage will not effect system operation unless an overload condition causes
reduced running speed, along with reduced voltage on the start winding.
500
400
Start (Auxiliary) Winding Volts
260
230 Volt 50/60 Hz
Motor Operation
Line Voltage
115 Volt 50/60 Hz
Motor Operation
2CV-35
2CV-50
Connect
to
Capacitor
Start
Motors
300
200
240
Wiring Diagram
SINPAC
Switch
Rating
Cut Out Voltage
2CV, 2VR-15
50/60 Hz, Typical
180
6. Higher current switches can be used in place of lower rated switches of the
same series.
Catalog
Number
310V
220
260V,
310V
220
200
Cut In Voltage
2CV, 2VR-15
50/60 Hz, Typical
180
60
Not Applicable
70
80
90
100
110
Start (Auxiliary) Winding Volts
230 Volts
2VR-35
2VR-50
Connect to
Capacitor
Start/
Capacitor
Run Motors
Not Applicable
CS Start capacitor, M Motor main winding, CR Run capacitor, ST Motor start winding
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