Auto Power Reclosing Relay
S8-300
Auto Power Reclosing Relay
S8-300
The S8-300 is an auto reclosing relay that provides automatic reclosing function for protection against the
power supply interruptions frequently. This relay will act its protection function to trip automatically when
overvoltage or undervoltage is detected. The reclosing function can make the impermanent short circuit status
return to the normal condition.
The relay can take measurement of each line voltage on three-phase system. utilize an alarm contact connected
to a buzzer for signaling to a prompt solution if the fault is still not cleared. The S8-300 also provide with a
" Lockout" function in order to inhibit further reclosure attempts following a breaker trip or even to prevent
the selective relays for switching to the objects.
The relay can in dicate the cause on the front plate as each possible fault occurs, besides it is equipped with
RS 485 Modbus for the related information received.
FEATURES
Breaker open / close indicator.
Real - time voltage 4 digits LED display.
Programmable adjustment for voltage transfomer ratio.
Setting value protected by password.
Local display of data recorded at the moment of a fault.
Line RMS voltage measurement.
ON / OFF / Buzzer relay contact output.
With RS 485 output.
Immunity test according to IEC 255 standards.
Outside dimension compatible for DIN standards (144x144mm)
Intemal fault detection.
FUNCTIONS
27-Line under voltage relay with definite time delay.
59-Line over voltage relay with definite time.
V V
79-Auto reclosing relay with definete time.
Reclosing count down time with internal buzzer and contacts output.
Disable reclosing external lock.
S8-300
Auto Power Reclosing Relay
SPECICATION
Overvoltage and Undervoltage
Rated voltage input
General
AC 110V, 220V or 380V
30%, 50/60HZ
Overload capability
Dielectric strength
IEC 688, AC 2.3KV/1 minute between terminals
AC 3KV/1 minute between all terminals/case
2 x rated 5sec.
Overvoltage setting range
100% ~ 130%
Overvoltage time delay
0 ~ 99sec.
Undervoltage setting range
70% ~ 100%
Undervoltage time delay
Operating temperature
Storage temperature
Max.humidity
0 ~ 60 ºC
-10 ~ 70 ºC
90%
0 ~ 99sec.
Immunity Test
Reclosing unit
Withstanding impulse voltage
Reclose time delay
0 ~ 99sec.
The time of reclose
1 ~ 9 times
Alarm for reclose
internal buzzer
Electrical transient in burst
Electrostatic discharge
Voltage disps and short interuptions
and contacts output
Disable reclosing
external lock
or breaker on
ORDERING INFORMATION
Accuracy
<
Over/Under voltage setting
Time delay
=±
0.5% full scale
(Whichever is greater)
at 0 msec: 50 ms Max.
Power supply
Nominal voltage
AC/DC 85~265 V
or DC 20~60 V
Burden
S8-300
± 3% of set value or ± 20ms.
Model
Input voltage
1: AC 110V ( 65V ~ 160V)
2: AC 220V (130V ~ 320V)
3: AC 380V (225V ~ 560V)
0: Option
AC <
= 7W
= 6VA,DC<
Power supply
Display
Type
0.56"H, red LED
Digital format
1 row of 4 digits
1: AC/DC 85~265 V
2: DC 20~60 V
0:Option
1 row of 2 digits
(reclosing count down time)
Detection Input
Rated voltage input
AC 110V ( 65 ~ 160V)
AC 220V (130 ~ 320V)
AC 380V (225 ~ 550V)
Type
External lock & ON verify
Output
Relay contacts
SPST for trip/reclose/buzzer
Rated voltage
250V AC/DC
Continuous carry
5A
Make and carry for 0.5s
30A
Make and carry for 3.0s
15A
Communication
Interface
RS485
Protocal
MODBUS, RTU framing
Baud rate
Address range
Data format
Number of meter
1200 ~ 38400 programmable
1 ~ 255 programmable
N.8.1/ N.8.2/ O.8.1/ E.8.1 programmable
up to 32
256 (option)
Frame
Degree
IP52 or IP54
RS485 output
Y: Yes
N: No
IEC 61000-4-5 (IEC 255-5)
IEC 61000-4-4 (IEC 255-22-4)
IEC 61000-4-2
IEC 61000-4-11
S8-300
Auto Power Reclosing Relay
CONNECTION DIAGRAM
OUTSIDE DIMENSION(Unit:mm)
Max. 25
O
B- A+
13 12
11 10
138
Exit Lock ON Verify
RS 485
or
(RS 232)
144
Trip
8
7
6
Close
5
144
137.4
Voltage
L3
L2
L1
3
2
1
Power Supply
-
9
+1
-0
Detection
Relay Contact
Buzzer
Panel Cut-Out
4
+
P2
P1
138
T1
8
86
144
TAIK ELECTRIC CO., LTD.
+1
-0