COMMON MODEL

Remove
link for FOR 3 PH AND 1 PH
60 Hz ALTERNATOR
Note: All potentiometers are 25 turns type to complete
its start to end rotation
VOLT:
Rotate these pot clockwise to increase AC terminal voltage and anticlockwise to decrease
AC terminal voltage.
STAB:
Stability potentiometer is factory set such that optimum response of voltage recovery is achieved
during sudden load changes. In some cases in order to release burden on engine it is required to
sluggish the recovery time of voltage, therefore to increase the response time STABpotentio-
meter is carefully rotated anti clock wise direction such that response time will increase resulting
larger dip in terminal voltage during sudden load. Kindly note that by excessively rotating STAB
potentiometer to clock wise direction at one stage voltage will become unstable and cause hun-
ting. Again by gradually rotating the STAB pot to anti clock wise direction will stabilize the gener-
ator voltage. ( It is advisable that only technically qualified person should adjust these pot.)
UFRO:
The under frequency roll off ( UFRO ) is factory set at 47 Hz for 50 Hz generator. For 60 Hz
6.3 Amps generator by removing 50/60 Hz link UFRO will set to 57 Hz. In case if it is required to set
20X5 mm UFRO level to any other frequency than it is advisible to adjust UFRO potentiometer from
fuse 45 Hz to 59 Hz depending upon whether it is 50 or 60 Hz alternator. Rotating UFRO potentio-
meter clock wise direction will set UFRO level in increasing frequency direction and rotating
in anti clock wise direction will set to decreasing frequency. UFRO activation is indicated by
UFI LED.
OE:
Excitation field current exceeding its specified limit indirectly indicates alternator over load.
AVR has in built accurate current sensing circuitry to protect alternator windings from over
load. DC field current monitored by AVR circuitry will cut off field supply after 20-25 seconds
when field current exceeds preset value. The over excitation trip level is factory set to 6 A
U N1 V N F1 F2 DC. It will be required to set trip level as specified by excitation current on alternator name
plate. The OE potentiometer is factory set to fully clock wise direction ( 6 A DC). By rotating
For single the potentiometer to anti clock wise direction will set DC current trip level from 6 A DC dow-
phase nwards to 0 A DC. Vice versa rotating OE potentiometer to clock wise direction will set trip
operation level from 0 A DC upwards to 6 A DC There are two methods to set trip l evel. First method is
link to load the generator to full load and then rotate OE potentiometer anti clock wise direction
till OE LED turns ON. Once OE LED turns ON the timer will be activated and after 20-25
N & N1 seconds field supply will be cut off. Second method is to connect a DC ampere meter in be-
and do not tween F1 & field wire, now load the generator such that required DC current is observed on
input to V ampere meter. Rotate OE potentiometer anti clock wise direction such that OE LED turns
ON and this will set OE trip at required DC current.

STATOR
N
SPECIFICATIONS:
U 2 PH.(415 VAC) + NEUTRAL
INPUT VOLTAGE
V OR 1PH.(220 VAC)
SENSING VOLTAGE 220 TO 415 V AC
W OUTPUT EXCI. VOLTAGE 100 V DC
OUTPUT EXCI. CURRENT 6 A DC. ( 8 A DC FOR 15 SECONDS )
FIELD OHMS MINIMUM 12 OHMS
INPUT FREQUENCY 50 / 60 Hz
RESIDUAL BUILD UP 5 V AC AT 50 Hz.
VOLTAGE REGULATION +/- 1 %. Thermal drift 0.04 %per deg C
FACTORY SETTING 47 Hz,
UNDER FREQUENCY
FOR 60 Hz REMOVE LINK.
ROTATING (UFRO / UFI )
INDICATION BY UFI - LED
PART
10- 25 SECONDS DELAY TIMER.
OVER EXCITATION ADJUSTABLE POT RANGE 0 - 6 A DC.
VOLTAGE TRIP INDICATION BY OEI - LED
( OE SET / OEI LED) (Factory setting 6 A DC max)
20-100Hz 50 mm/sec
VIBRATION
100Hz - 2 Khz 3.3g
OPERATING TEMPERATURE -40 TO +70 C
+ STORAGE TEMPERATURE -55 TO +80 C
FIELD -
RELATIVE HUMIDITY 0 TO +70 C : 95 %
FUSE ( FAST ACTING) 6.3 AMPS ( SIZE: 20 X 5 mm)
NOTE: Continuous development of our products entitles us to change specifications DIMENSIONS (L X B X H) 78 X 115 X 40 mm
& other details without notice. Please contact factory for latest
information ( info@spsindia.biz ) WEIGHT 250 gms
 CONNECTION DIAGRAM OF AVR SPS-101 WHEN CONNECTED
TO ALTERNATOR HAVING ISOLATED AUXILLARY WINDING

Remove
link for
60 Hz

Note: All potentiometers are 25 turns type to complete

its start to end rotation
VOLT:
Rotate these pot clockwise to increase AC terminal voltage and anticlockwise to decrease
AC terminal voltage.
STAB:
Stability potentiometer is factory set such that optimum response of voltage recovery is achieved
during sudden load changes. In some cases in order to release burden on engine it is required to
sluggish the recovery time of voltage, therefore to increase the response time STABpotentio-
meter is carefully rotated anti clock wise direction such that response time will increase resulting
larger dip in terminal voltage during sudden load. Kindly note that by excessively rotating STAB
potentiometer to clock wise direction at one stage voltage will become unstable and cause hun-
ting. Again by gradually rotating the STAB pot to anti clock wise direction will stabilize the gener-
ator voltage. ( It is advisable that only technically qualified person should adjust these pot.)
UFRO:
The under frequency roll off ( UFRO ) is factory set at 47 Hz for 50 Hz generator. For 60 Hz
6.3 Amps generator by removing 50/60 Hz link UFRO will set to 57 Hz. In case if it is required to set
20X5 mm UFRO level to any other frequency than it is advisible to adjust UFRO potentiometer from
45 Hz to 59 Hz depending upon whether it is 50 or 60 Hz alternator. Rotating UFRO potentio-
fuse meter clock wise direction will set UFRO level in increasing frequency direction and rotating
in anti clock wise direction will set to decreasing frequency. UFRO activation is indicated by
UFI LED.
OE:
Excitation field current exceeding its specified limit indirectly indicates alternator over load.
AVR has in built accurate current sensing circuitry to protect alternator windings from over
load. DC field current monitored by AVR circuitry will cut off field supply after 20-25 seconds
when field current exceeds preset value. The over excitation trip level is factory set to 6 A
U N1 V N F1 F2 DC. It will be required to set trip level as specified by excitation current on alternator name
For single plate. The OE potentiometer is factory set to fully clock wise direction ( 6 A DC). By rotating
phase operation the potentiometer to anti clock wise direction will set DC current trip level from 6 A DC dow-
nwards to 0 A DC. Vice versa rotating OE potentiometer to clock wise direction will set trip
linkN & N1 level from 0 A DC upwards to 6 A DC There are two methods to set trip l evel. First method is
and do not to load the generator to full load and then rotate OE potentiometer anti clock wise direction
input to V Isolated till OE LED turns ON. Once OE LED turns ON the timer will be activated and after 20-25
Auxillary seconds field supply will be cut off. Second method is to connect a DC ampere meter in be-
Winding tween F1 & field wire, now load the generator such that required DC current is observed on
ampere meter. Rotate OE potentiometer anti clock wise direction such that OE LED turns
ON and this will set OE trip at required DC current.
STATOR
N
SPECIFICATIONS:
U
AUXILLARY INPUT VOLTAGE 150 TO 250 V AC
V
SENSING VOLTAGE 220 TO 415 V AC
W OUTPUT EXCI. VOLTAGE 100 V DC
OUTPUT EXCI. CURRENT 6 A DC. ( 8 A DC FOR 15 SECONDS )
FIELD OHMS MINIMUM 12 OHMS
INPUT FREQUENCY 50 / 60 Hz
RESIDUAL BUILD UP 5 V AC AT 50 Hz.
VOLTAGE REGULATION +/- 1 %. Thermal drift 0.04 %per deg C
FACTORY SETTING 47 Hz,
UNDER FREQUENCY
FOR 60 Hz REMOVE LINK.
ROTATING (UFRO / UFI )
INDICATION BY UFI - LED
PART
10- 25 SECONDS DELAY TIMER.
OVER EXCITATION ADJUSTABLE POT RANGE 0 - 6 A DC.
VOLTAGE TRIP INDICATION BY OEI - LED
( OE SET / OEI LED) (Factory setting 6 A DC max)
20-100Hz 50 mm/sec
VIBRATION
100Hz - 2 Khz 3.3g
OPERATING TEMPERATURE -40 TO +70 C
+ STORAGE TEMPERATURE -55 TO +80 C
FIELD -
RELATIVE HUMIDITY 0 TO +70 C : 95 %
FUSE ( FAST ACTING) 6.3 AMPS ( SIZE: 20 X 5 mm)
DIMENSIONS (L X B X H) 78 X 115 X 40 mm
WEIGHT 250 gms