Application pplicat ppli cation ion Exa Exampl Examples mples es ! !
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Detection of Phase Failure. Phase monitoring of voltage transformers to ensure the voltage integrity of control circuits in high voltage panels. Monitoring of the line supply in rural areas for over- and undervoltage protection. Monitoring of supply voltage from standby generator sets to ensure a constant voltage supply. Monitoring the voltage output of UPS systems.
Features ! ! ! ! ! !
ORDERING CODE
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T YP YP E
M OD OD EL EL
VOLTAGE
SP
P 2 S0 30
230V
POWER RELAY SUPPLY CONTACTS
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AC
DP
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Failsafe feature. Combined over-voltage and under-voltage detection. Monitoring of own supply voltage. Adjustable response delay on SP-231 SP-232 available with neutral. High precision and repetitive accuracy. Independent setting of over- and under-voltage tripping points. LED indication for type of fault and status of the relay. Latching facility. 10A SPDT relay output.
SEE PAGE 32 FOR ORDERING OPTIONS
Description Descri escr es crip ipti ption tion on of Ope Operat Operation Operati ration ion on The SP-230, SP-231 and SP-232 are precision voltage wind wi ndow ow co compa mpara rato tors rs fo forr th thre ree e ph phas ase e AC ap appl plic icat atio ions ns,, monitoring monit oring phase-to-phase phase-to-phase volta voltage. ge. They respon respond d to both over-vo ove r-volta ltage ge as wel welll as und under-v er-volt oltage age con condit dition ions. s. Pow Power er supply sup ply to theunit is tap tappedoff pedoff thevolta thevoltage ge sen sensin sing g inp inputs uts.. Voltage Sensing: The relay is energised when the voltage is Voltage maintained between the set over-voltage and under-voltage thresh thr eshold olds. s. If the vol voltag tage e bet betwee ween n any two pha phases ses ris rises es above the over-voltage setpoint or drops below the undervoltage setpoint, the relay de-energises and the appropriate LED indicates “over-voltage” or under-voltage” respectively. The Th e re rela lay y en ener ergi gise ses s ag agai ain n if th the e vo volt ltag age e re reco cove vers rs to wi with thin in th the e set volt voltage age windo window w bandw bandwidth. idth. The SP-230 is calibrated to respond to the RMS of sinusoidal wavef sinusoidal waveform. orm. In except exceptional ional circum circumstanc stances es where voltages are not sinusoidal in nature, scale inaccuracies may be experi experienced enced . Note:
Hysteresis: Hysteresis represents the difference between the tripping tripping point and the recovery recovery point of the unit. The hysteresis is fixed to 2% to prevent relay chatter when the voltage volta ge fluc fluctuate tuates s around the setpoi setpoint. nt. Latching: When latching is armed, the relay will not recover from a tripped condition, but will remain deenergised until reset. The appropriate LED will indicate the type of fault responsible for the tripped condition. The unit can be reset by either breaking and re-applying power supply to the unit or by momentarily disabling the latching circuit (e.g. push-to-open switch). On power-up of the module, the latching is inactive for approximately 10 seconds. Adjustable Response (SP-231): Response delay can be adjusted from 1 to 10 seconds. When a trip condition is detected, the relay will only de-energise after the set response time (a delayed on recovery is also available on special order).
Operational peratio pera tional nal Dia Diagram gram Voltage Sensing Without Latching (SP-230) Overvoltage Setpoint
Hysteresis
Nominal Voltage Undervoltage Setpoint
Voltage Sensing With Latching (SP-231) Overvoltage Setpoint
Hysteresis
Hysteresis
Undervoltage Setpoint
Power Supply Voltage
Power Supply Voltage
Latching Enabled
Latching Enabled
Relay On
Relay On l = Latching disabled for approximately 10 seconds at power up. t t = = response delay
18
Hysteresis
Nominal Voltage
l
t
t
Description escription of Control Controls P1: The Over-voltage Threshold is adjusted on P1. SLIMLINE
SP-230
OverVoltage
10
Voltage Window Comparator OverVoltage 10
15
P1
P2: The Under-voltage Threshold is adjusted P2.
SP-231
SLIMLINE
Voltage Window Comparator
The scales for over-voltage and under-voltage threshold settings are calibrate in percentage deviation from nominal supply voltage.
Note:
15
P1 P3: Adjustable Response Delay from 0.1 to 10 seconds. 5% UnderVoltage
20% 15
10
P2
20% -15
P3
-10
P2 -5%
-20%
LED 1 LED 2 LED 3
5% UnderVoltage
Over Voltage Relay ON Under Voltage
LED 1 LED 2 LED 3
LED 2: The green LED marked “Relay ON” will illuminate when the relay is energised, i.e. under normal supply conditions.
-5%
-20%
Over Voltage 0.1s
LED 1: The red LED marked “Over-voltage” will illuminate whenever the current exceeds the set over-voltage threshold.
10s
Relay ON
LED 3: The red LED marked ‘Under-voltage” will illuminate whenever the current drops below the set under-voltage threshold.
Under Voltage
Wiring irin and an Connection Power Supply
Relay Contacts
The three phase R, S and T are to be connected to pins 5,6 and 7 respectively.
Normally Open
1+ 3
Normally Closed
1+ 4
Latching Latching to be enabled by interconnecting pin 8 and pin 9 (e.g. Push-to-open reset switch)
SP-230/SP-231
SP-230/SP-231
SP-232
3 Phase Power Supply R S T
3 Phase Power Supply R S T
3 Phase Power Supply R S T
Latching
APPLICATION 1
APPLICATION 2
Without latching
Latching
s r o t i n o M r e w o P
APPLICATION 3
With latching
Technical echnical Specifications VOLTAGE SENSING
POWER SUPPLY
Supply voltage (phase-to-phase): 12, 24, 110, 230, 400, 415, 525V AC ±15% Power consumption: 3VA (approx.) 6VA for 415, 525V AC (approx.)
Calibrated to respond to the RMS of a sinusoidal waveform. Repetitive accuracy: 1% Hysteresis: 2% fixed (relative to its supply voltage). Response delay: 1 second. Latching disabled during power-up: approx. 10 seconds.
