CARLO GAVAZZI RSBS Series User manual

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
1-phase compressor soft starter
Benets
• Easy to use. No user adjustments required.
• Space saving solution. Compact DIN or panel mount
versions available. Integrated start capacitor.
• Integrated diagnostics. Detection for voltage dips and
interruptions. Detection of welded relay contacts.
• Adjusts to load requirements. The built-in HP function
ensures that the compressor starts in < 1 second even
under high pressure di󰀨erence during start.
• Guided model selection. Easy to use online
selection tool to select the appropriate soft starter
model depending on the compressor brand/model.
http://gavazziautomation.com/nsc/HQ/EN/soft_starters.
• Reduces light icker. RSBS reduces the compressor
start current by >50% to reduce light ickering.
Description
The RSBS....V23C.. is a single phase soft starter for 1
phase compressors up to 32 Arms.
The RSBS can limit inrush currents to 45 AACrms (under
balanced conditions) and has a maximum ramp-up time of
600 ms. A special function (HP function) allows the RSBS to
start compressors, even when pressures are not balanced,
by allowing a maximum current of 80 AACrms. Following
the ramp-up, the semiconductors will be bypassed by the
internal electromechanical relay. The RSBS is rated for a
maximum of 10 starts per hour (evenly distributed).
RSBS
Main features
• Limitation of compressor starting current
• Ramp-up time optimised to 600 ms
• Anti-short cycling function with built-in delay between starts
• Voltage dips/interruptions detection during bypass state
Applications
• Scroll compressors, piston compressors

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Enter the code entering the corresponding option instead of .
Order code
RSBS 23 32 A2 V23 HP
Code Option Description Notes
R-Soft starter
S-
B-Compressor soft starter
S-Single phase control
23 -230 VAC Rated operational voltage
32 -32 Arms Rated operational current
A2 -230 VAC Rated control voltage
V-Options
2-Auxiliary relay output Alarm status indication
3-Third generation
C24 Internal start capacitor: 200 – 240 μF
C17 Internal start capacitor: 145 – 175 μF
C10 Internal start capacitor: 100 – 140 μF
C00 External start capacitor
HP -Control algorithm for high pressure starts See caution notes
Selection guide
Start capacitor size Part number
200 – 240 μF RSBS2332A2V23C24HP
100 – 140 μF RSBS2332A2V23C10HP
145 – 175 μF RSBS2332A2V23C17HP
External RSBS2332A2V23C00HP
For proper model selection refer to our online soft starter selector tool:
http://www.gavazziautomation.com/nsc/HQ/EN/soft_starters
• The internal relays may be in an undened state due to shocks during transportation. In case both relays are latched in
the ON state, there will be a direct on line start of the compressor, even without a control signal.
• To avoid direct on line start, the user should do an initial power up with no load connected for a period of ≥ 3 seconds.
• Short circuit and overload protection are not provided with the RSBS and must be installed separately.
• The RSBS soft starter is not to be used as a safety device. The RSBS, on its own, cannot guarantee any safety and
therefore other components need to be used to ensure that the system operates safely.
• Repeated starts under unbalanced pressure (resulting in HP starts) will reduce the lifetime of the RSBS.

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Further reading
Information Where to nd it
RSBS instruction
manual http://cga.pub/?a1f658
Troubleshooting
guide http://cga.pub/?686d1f
CAD drawings
3D (.dwg) - http://cga.pub/?ada314
2D (.dwg) - http://cga.pub/?e0d224
Step (.stp) - http://cga.pub/?f889f6
CARLO GAVAZZI compatible components
Purpose Component name/code Notes
External start capacitor kit STARTCAP-200UF-SMA For RSBS2332A2V23C00HP models
Selection guide
Category Compressor maximum operating current (IMAX) Model selection
Compressors 2.5 - 16 Arms RSBS2332A2V23C10HP
16 - 32 Arms RSBS2332A2V23C24HP
Note: For compressors with IMAX ≥ 25 Arms that start with unequalised pressures (> 5 bar) the model
RSBS2332A2V23C00HP is recommended.
Note: Use a start capacitor with rated voltage of 330 VAC or higher. Start capacitor must also have a 15kΩ (2W) bleed resistor.

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Structure
Element Component Function
ALED indicators Supply (Green). Indicates that the RSBS supply is ON.
BLED indicators
Alarm (Red). Indicates that the RSBS is in alarm. The number of
ashes indicates the alarm type.
Recovery between starts (Orange). Indicates that the recovery time
between starts has not yet elapsed.
Note: During recovery between starts the RSBS will not respond to
control voltage.
COutputs
R: Connection to compressor main winding (R)
Rc: Connection to run capacitor
L / L1: Mains supply connection
N / L2: Supply neutral connection (L2 connection for U.S. applica-
tions)
ON: Control input signal (start signal)
S: Connection to compressor start winding (S)
Sc: Connection to external start capacitor (only for C00 versions)
DAlarm relay
Alarm relay (Changeover)
11, 12: Normally closed (NC)
11, 14: Normally open (NO)
EQR code Scan to link to troubleshooting guide.
ABC D
RSBS2332A2V23C00HP
EABC D
RSBS2332A2V23C..HP
E

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Mode of operation
The RSBS soft starter series works on a current limit algorithm. When control signal is applied via the On terminal, the
RSBS start the ramp-up sequence. The compressor start current is limited to 45 Arms. Once the compressor reaches full
speed, the RSBS automatically detects this condition and switches on the bypass relay to reduce heat dissipation within
the electrical panel. The RSBS will optimise the motor start time to around 600 ms (See Fig. 1).
If the motor does not reach full speed within a maximum of 1 second, the RSBS will trigger the excess ramp-up time alarm
(5 ashes) to protect the internal relay from switching a too high current that would reduce the relay lifetime. The alarm will
self-recover after 5 minutes.
Current limit algorithm
During the ramp-up sequence, the RSBS will check if the motor is rotating. If the RSBS nds that the motor is in locked
rotor condition, it will trigger the HP function after ~ 250 ms (See Fig. 2). During the HP sequence, the RSBS will gradually
increase the current limit setpoint up to a maximum of 80 Arms. This mode of operation is required when the starting pres-
sures are not balanced or where voltage supply is very weak.
Note: Starts under unbalanced pressure conditions can reduce the lifetime of the RSBS due to the higher current owing
through the components. Allow enough time between starts to ensure that starting pressures di󰀨erence is kept to a
minimum.
High pressure (HP) function
Current (AAC)
45
Time (ms)
≤ 600
Current (AAC)
HP func�on
80
~ 250 < 1s
Time (ms)
45
End of ramp
Current (AAC)
HP func�on
80
~ 250 < 1s
Time (ms)
45
Fig. 1
Fig. 2
The RSBS series of soft starters is designed for single phase compressors with a maximum start time of 1 second. Typical
applications include scroll and piston compressors.

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Features
Material PA66
Assembly DIN or panel
Touch protection IP20
Weight Approx. 450 g
Overvoltage category II
General data
Fig. 4 RSBS2332A2V23C..HP
Fig. 3 RSBS2332A2V23C00HP

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Ramp-up time ≤ 600 ms
Ramp-down time 0 s
Settings
Operational voltage range 195.5 – 264.5 VAC
Supply current at idle ≤ 15 mA
Blocking voltage 1200 Vp
Rated AC frequency 50/60 Hz (+/- 5 Hz)
Rated insulation voltage 250 VAC
Integrated varistor Yes
Pickup voltage 90 VAC
Drop out voltage 25 VAC
Power supply
Environmental
Operating temperature RSBS2332A2V23C00HP: -20ºC to +65ºC (-4ºF to +149ºF)
RSBS2332A2V23C..HP: -20ºC to +55ºC (-4ºF to + 131ºF)
Storage temperature - 30˚C to + 70˚C (- 22˚F to +158 ˚F)
Relative humidity <95% non condensing @ 40ºC
Pollution degree 2
Installation category II
Installation altitude 0 - 1000 m
Vibration resistance 2 g / axis (2 - 100 Hz, IEC60068-2-6, EN50155, EN61373)
Impact resistance 15/11 g/ms (EN50155, EN61373)
EU RoHS compliant Yes

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Electromagnetic compatibility (EMC) - immunity
Electrostatic discharge (ESD) EN/IEC 61000-4-2
8 kV air discharge, 4 kV contact (PC2)
Radiated radio frequency
EN/IEC 61000-4-3
3 V/m, from 80 MHz to 1 GHz (PC1)
3 V/m, from 2 to 2.7 GHz (PC1)
Electrical Fast Transient (Burst)
EN/IEC 61000-4-4
Output: 2 kV, 5 kHz (PC2)
Input: 1 kV, 5 kHz (PC2)
Conducted Radio Frequency EN/IEC 61000-4-6
3 V/m, from 0.15 to 80 MHz (PC1)
Electrical Surge
EN/IEC 61000-4-5
Output, line to line: 1 kV (PC2)
Output, line to earth: 2 kV (PC2)
Input, line to line: 0.5 kV (PC2)
Input, line to earth: 1 kV (PC2)
Voltage dips and interruptions EN/IEC 61000-4-11
Electromagnetic compatibility (EMC) - emissions
Radio interference eld
emissions (conducted)
CISPR 11, EN/IEC 55011
Class B1
Harmonics IEC/EN 61000-3-21
IEC/EN 61000-3-121
Disturbance power CISPR 14, IEC/EN 55014-11
Flicker IEC/EN 61000-3-111(load conditions apply)
Compatibility and conformity
Conformance IEC/EN 60947-4-2, UL60947-4-2
Approvals
1. Applicable when current limit is ≤ 45 Arms
Note:
• Performance Criteria 1 (PC1): No degradation of performance or loss of function is allowed when the product is operated
as intended.
• Performance Criteria 2 (PC2): During the test, degradation of performance or partial loss of function is allowed. However
when the test is complete the product should return operating as intended by itself.
• Performance Criteria 3 (PC3): Temporary loss of function is allowed, provided the function can be restored by manual
operation of the controls.

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Overload cycle @ 40ºC
surrounding temperature
(acc. to IEC/EN 60947-4-2)
AC53b: 1.9 - 1 : 359
Maximum number of starts/hr
@ rated overload cycle @ 40ºC
surrounding temperature
10 (evenly distributed)
Rated operational current @
40°C 32 Arms
Current limit 45 Arms
Maximum starting current 80 Arms
Minimum load current 2.5 Arms
Minimum time between starts 6 minutes
Minimum time between stop to
start 3 minutes
Outputs
Number of output relay 1
Function of relay Alarm
Rated operational voltage 250 VAC / 30 VDC
Rated insulation voltage 250 VAC
Dielectric withstand voltage 2.5 kV
Overvoltage category II
Type of control circuit Electromechanical relay
Number of contacts 2
Type of contacts Changeover: Normally closed (NC), Normally open (NO)
Type of current AC / DC
Rated operational current 3 Arms @ 250 VAC, 3 Arms @ 30 VDC
Auxiliary relays
Control voltage (Uc) 230 VAC (± 15%)
Control voltage range (Uc) 195.5 – 264.5 VAC
Maximum pick-up voltage 90 VAC
Minimum drop out voltage 25 VAC
Rated AC frequency 50 / 60 Hz (± 5 Hz)
Rated insulation voltage (Ui) 250 VAC
Control input current 3 mArms – 6 mArms
Inputs

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Performance
Model IEC rated current RSBS2332A2V23Cxx
RSBS 32 Arms 4.4 kW / 5 HP
Current / power ratings: kW and HP @ 40°C
Ratings:
kW rating according to IEC/EN 60947-4-2
Terminal markings
Marking
RConnection to compressor main winding (R)
Rc Connection to run capacitor
L / L1 Mains supply connection
N / L2 Supply neutral connection (L2 connection for U.S. applications)
On Control input signal (start signal)
SConnection to compressor start winding (S)
Sc Connection to external start capacitor
Connection Diagrams
RSBS2332A2V23C..HP RSBS2332A2V23C00HP

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Note: Use 75ºC Copper (Cu) conductors
Connection Specications
Main conductors (R, Rc, L /L1, N / L2, ON, S, Sc)
Flexible (solid or stranded) 0.5 – 16 mm2, AWG 20 - 6
Terminal screws M4
Maximum tightening torque 1.19 Nm (10.5 lb-in)
Stripping length 8.0 mm
Auxiliary conductors (11, 12, 14)
Flexible (solid or stranded) 0.2 – 1.5 mm2, AWG 30 - 12
Terminal screws M3
Maximum tightening torque 0.5 Nm (4.5 lb-in)
Stripping length 7.0 mm - 8.0 mm
Wiring diagram - RSBS..V23C..HP
L/L1
N/L2
K1
C
R
S
M1~
Run
cap
RRc L/L1 N/L2 ON S
Wiring diagram - RSBS..V23C00HP
L/L1
N/L2
K1
C
R
S
M1~
Run
cap
Start
cap
RRc L/L1 N/L2 ON SSc
Wiring Diagrams
Note: Install a 15 kΩ (2W) resistor in parallel to the start capacitor in case of RSBS..C00HP.

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Alarms
The RSBS includes a number of diagnostics and protection features each of which is signalled through a ashing sequence
on the red LED.
Note: In case there is a fault in the internal power supply (PSU) of the RSBS, the green LED (and not the red LED) will start
ashing. In this condition, the relay contact will not change state.
Troubleshooting
State Supply
(Green LED)
Delay
(Orange LED)
Alarm
(Red LED)
Relay contact
position (12, 11, 14)
Idle ON OFF OFF 11, 12
Ramping ON OFF OFF 11, 12
Bypass ON OFF OFF 11, 12
Alarm ON OFF Flashing 11, 14
Alarm recovery ON OFF Flashing 11, 14
Recovery time2
(between starts) ON ON OFF 11, 12
Internal power supply
fault Flashing OFF OFF 11, 12
LED and Relay status indications
2. If supply on RSBS is removed before the recovery period (6 mins) has elapsed, when supply is restored, the remaining
delay will continue until the remaining recovery time (before supply removal) is over.
Flashing sequence
Every alarm that the RSBS will trigger will be signalled via a specic ashing sequence on the red LED. The specic alarm
will ash with a period of 2 s ON, 2 s OFF.
Flashing sequence during recovery from alarm
When the alarm can self-recover, the ashing sequence of the red LED will be interleaved with a 6 s ON-OFF-ON ashing
sequence and then the ashing sequence will repeat (see diagram below).

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Flashing sequence when user intervention is required
In the case where user intervention is required to perform a hard reset, the ashing sequence of the alarm will be followed
by a 6 s OFF period followed by the ashing sequence. This ashing sequence will repeat itself until a hard reset is per-
formed.
Number of ashes 2
Alarm Under voltage3
Alarm description
The under voltage alarm will be triggered when the supply voltage (Ue) is:-
Condition 1: Ue < 190 VAC for ≥ 1 s
Condition 2: 140 VAC < Ue < 160 VAC for ≥ 200 ms
Condition 3: 90 VAC < Ue < 140 VAC for ≥ 100 ms
Condition 4: Ue = 0 VAC for > 50 ms (+20 ms)
Alarm recovery period 5 mins (from the moment when voltage is within operational range)
Consecutive alarms for
hard reset N/A
Action to recover alarm The alarm will self-recover after the recovery period. Voltage dips/interruptions during re-
covery between starts and/or alarm recovery shall be ignored.
Troubleshooting • Check for any loose connections on L / L1 and N / L2 terminals.
• Check quality and level of supply voltage after compressor starts.
3. The under-voltage alarm is only active in bypass state
Number of ashes 3
Alarm Locked rotor
Alarm description The locked rotor alarm will be triggered when the measured current (in bypass state) ex-
ceeds 32 AAC. The alarm trigger time will vary according to the chart below.
Alarm recovery period 5 minutes
Consecutive alarms for
hard reset 4
Action to recover alarm The alarm will self-recover after the recovery period. If this alarm is triggered on two con-
secutive starts, user intervention will be required to reset the power supply (L/L1 & L2/N).
Troubleshooting • Check compressor windings resistance to check if motor is damaged.
• Check for any blockage in the system.
Measured current (Arms) Time to trip (s)
33.6 1
35.2 0.5
38.4 0.2
41.6 0.1
≥ 44.8 0.05

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Number of ashes 4
Alarm Start capacitor relay protection
Alarm description This alarm will be triggered when the RSBS detects a faulty start capacitor electro-
mechanical relay (EMR).
Alarm recovery period 5 minutes
Consecutive alarms for
hard reset 2
Action to recover alarm
The alarm will self-recover after the recovery period. Before attempting a second start, the
RSBS will check the status of the EMR. If the EMR is found to be still faulty, the RSBS will
remain in the alarm state. User shall then reset the mains supply to reset the RSBS.
Troubleshooting • Check that the proper RSBS model (start capacitor size) is being used.
• Check for proper wiring.
Number of ashes 5
Alarm End of ramp (EOR)
Alarm description
The RSBS will trigger this alarm if it cannot start the compressor within a maximum of 1
second. The EOR alarm will be triggered if, after the initial current limit and the subsequent
HP phase (during ramp-up) the compressor does not reach nominal speed within a maxi-
mum of 1 second. The EOR alarm will prevent the RSBS from switching a high transitional
current.
Note: The EOR alarm may also be triggered if there is a damaged run and/or start capaci-
tor. This results in less starting torque and therefore the compressor might not start.
Alarm recovery period 5 minutes
Consecutive alarms for
hard reset 4
Action to recover alarm
The alarm will self-recover after the recovery period. If during the second consecutive at-
tempt, the same alarm is triggered, the RSBS will remain in the alarm state. User shall then
reset the mains supply to reset the RSBS.
Troubleshooting
• Check that the proper RSBS model is being used.
• Check for high pressure di󰀨erence during compressor start.
• If pressure di󰀨erence is too high, allow more time between starts.
• For the models RSBS…C00 check the value of the run and start capacitors. If the capaci-
tance value is lower than expected, replace the capacitor.
• For the models RSBS…C10/C17/C24, check the value of the run capacitor. If the capaci-
tance is lower than the rated value, replace the capacitor.
Number of ashes 6
Alarm Internal over-temperature alarm
Alarm description The RSBS will trigger this alarm if it measures an internal temperature > 115ºC for ≥ 1s
Alarm recovery period Typically 5 mins – RSBS might need a longer recovery period depending on the surround-
ing temperature level.
Consecutive alarms for
hard reset 4
Action to recover alarm The alarm will self-recover after the recovery period.
Troubleshooting • Check that there is proper ventilation around RSBS.
• Ensure that the vents of RSBS are not obstructed.

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Number of ashes 7
Alarm Compressor running in reverse
Alarm description The RSBS shall detect that the compressor is rotating in the reverse direction within 2
seconds. The alarm is active in bypass state only.
Alarm recovery period 5 minutes
Consecutive alarms for
hard reset 4
Action to recover alarm The alarm will self-recover after the recovery period.
Troubleshooting • Check for unstable or low supply voltage level.
Number of ashes 8
Alarm Load loss
Alarm description
This alarm will be triggered when the load current is ≤ 2 AAC for ≥ 1 mains cycle. The alarm
will be active during ramp-up and bypass mode.
Ramp-up: As soon as the ON signal is turned ON, the RSBS will start the ramp-up func-
tion. If the measured current is ≤ 2 AAC then the RSBS will not attempt a start
and will raise the load loss alarm.
Bypass: If during bypass the measured current is ≤ 2 AAC for ≥ 1 mains cycle, the RSBS
will trigger the load loss alarm.
Alarm recovery period 5 minutes
Consecutive alarms for
hard reset N/A
Action to recover alarm
The alarm will self-recover after the recovery period. Load current will not be monitored
during recovery from alarm. If, during transition from alarm recovery to start of ramp-up,
the measured current is ≤ 2 AAC ≥ 1 mains cycle the RSBS will re-trigger the alarm.
The alarm will self-recover after 5 minutes.
Troubleshooting
• Check that the compressor (or a load > 2 Arms) is connected to the RSBS.
• Check quality of supply. This alarm may also be triggered when there is complete supply
voltage interruption.
Number of ashes 10
Alarm Welded main relay, Shorted SCR, Welded bypass relay
Alarm description
This alarm will be triggered when :-
1. The RSBS detects a current on the “L” connection when it is in IDLE state. (Fault:
Welded main relay). In this case the RSBS will trigger the alarm after 100 ms.
2. The RSBS detects a current > Imax HP during ramp-up state (Fault: SCR short or
bypass relay welded). The RSBS will trigger the alarm after ≈ 100 ms.
Alarm recovery period Non-recoverable alarm
Consecutive alarms for
hard reset 1
Action to recover alarm
The alarm will not self-recover. In case of a main relay weld condition the user needs to
provide an external means to disengage the compressor from the mains. (Since the aux-
iliary winding will remain connected to L and N through the main relay and run capacitor).
Troubleshooting
• Replace RSBS and contact your local Carlo Gavazzi representative.
• Check compressor winding resistance and verify that this is within manufacturer speci-
cations.

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Installation
Provide sufficient air circulation space for cooling as shown in the examples below. Do not obstruct the RSBS vents.
5 cm
(1.97”)
5 cm
(1.97”)
Front view
5 cm
(1.97”)
5 cm
(1.97”)
Top view
RRc L/L1 N/L2 ON S
5 cm
(1.97”)
5 cm
(1.97”)
5 cm
(1.97”)
Number of ashes Fully ON
Alarm Critical over-temperature alarm
Alarm description The RSBS will trigger this alarm if it measures an internal temperature >130ºC for ≥ 100
ms
Alarm recovery period Alarm does not self-recover
Consecutive alarms for
hard reset 1
Action to recover alarm
This alarm is considered to be a critical condition and the RSBS will immediately switch
OFF its output. The alarm is non-resettable. Once this alarm is triggered the user needs
to replace the RSBS.
Troubleshooting • Check that there is proper ventilation around RSBS.
• Replace the RSBS with a new one.

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Carlo Gavazzi Ltd.
RSBS
RSBS DS ENG27/05/20
Short circuit protection
Type 1 protection implies that after a short circuit, the device under test will no longer be in a functioning state. The product
variants listed in the table hereunder are suitable for use on a circuit capable of delivering not more than 5,000 symmetrical
Amperes, 240 Volts maximum when protected by fuses. Tests at 5,000 A were performed with Class RK5 fuses; please
refer to the table below for maximum allowed Ampere rating of the fuse. Use fuses only.
COPYRIGHT ©2019
Content subject to change. Download the PDF: www.gavazziautomation.com
Part No.
Prospective short
circuit current
[kArms]
Max fuse size [A] Class Article no.
RSBS2332A2V23C..HP 5 45 RK5
FLSR45
(manufacturer:
Littlefuse)
Protection co-ordination Type 1 according to UL 60947-4-2