Overcurrent Relay RAS70-3B - Industrial X Supply Co.,Ltd. Website

Overcurrent Relay
RAS70-3B
Made In Japan

The KASUGA Overcurrent Relay is specially designed to monitor and detect current in each phase
of a 3-phase system and provide a relay operation when an overcurrent condition occurs.
This relay is simple in design, robust in construction and small in size.
Special Features of KASUGA Overcurrent Relay RAS70-3B
> RAS 70-3 Overcurrent Relay is designed based on the combination of RAS 70 with a timer.
> Easy wiring constitution for compact panel mounting.
> A manually test button is provided for periodical inspection and product checking.
> Build-in delay timer with adjustable range of 0 ~ 1.0 second, optional : 0 - 10 sec. on request.
> Adjustable current setting from 2 ~ 7 Amps.
> Three Red and one Green LEDs are provided to indicate the status of each phase current
and the auxiliary power supply.
> A manually reset button is provided.
> A lockable front cover is provided to ensure that unauthorized personnel cannot tamper with
the set point.
SPECIFICATIONS
1. Type RAS70-3B
2. Supply Voltage AC 230V, 50/60Hz - 15 ~ +10%
3. Current Setting 2 ~ 7 A.
4. Delay Time Setting 0 ~ 1.0 sec.
5. Operating Time With 105% Input < 300 msec
With more than 200% Input < 100 msec.
6. Reset Current value More than 90% of operating value.
7. Output 2C. AC 250V, 5 A (cos 0 = 1)
Approval : UL and CSA recognised.
8. Indication Green LED (auxiliary power supply).
Red LED (relay tripped).
9. Life Electrical : > 100,000 operation.
Mechanical : > 100,000 operation.
10 Protection Structure IP50 (dust protection)
11. Enclosure :
Standard DIN case DIN 96x96x98mm.
Material ABS resin complying with UL94VO.
Weight Approx. 500g.
Knob (:R)
Red LED
(0.C. trip)
Knob
(time setting)
Green LED
(power supply)
TEST button
Red LED
(0.C. trip)
Knob (:S)
Red LED
(0.C. trip)
Knob (:T)
RESET
button

CHARACTERISTICS
Overcurrent Relay RAS70-3B
Voltage Accuracy Less than 3%
Repeat Accuracy Less than1%
Setting Accuracy Less than 5% of full scale
Temperature Accuracy Less than 5% at ±20°C
Insulation resistance >1000MΩ
Overcurrent Withstand 10 times for 3 sec.
Power Consumption Approx. 2VA
C.T. Power Consumption Approx. 0.5VA
Voltage withstand
Insulation
IEC 255-5
2kV rms for 1 minute between all case terminals
connected together and the case earth terminal.
2kV rms for 1 minute between independent circuit
including contact circuits.
Impulse test
IEC 255-5
5 KV peak, 1.2/50μs (0.5J) between all terminals and
case, earth and between adjacent terminal.
Environmental withstand
Temperature
IEC 68-2-1 / 68-2-2
Storage and transit - 25°C to +70°C
Operating -25°C to +55°C
Humidity
IEC 68-2-3
56 days @ 93% RH and +40°C
Enclosure protection
IEC 529
IP50 (dust protected)
Vibration
IEC 255-21-1
0.5g between 10 Hz and 150Hz
Electromagnetic wave
Non-operation for radio frequency at 130 ~ 180 MHz
and 400 ~ 500 MHZ (by Walkie-talkie of 5W).
92 ± 0.5
96
PANEL CUTOUT
92 ± 0.5
DIMENSIONS (mm)
96
108
11 80
90

Overcurrent Relay RAS70-3B
RAS 703
Operating current (A)
Operating current (A)
7
6
7
6
R
S
T
N
Voltage characteristics
(7A, 1 sec.)
70 80 90 100 110 120
Supply voltage (%)
Temperature characteristics
(7A, 1 sec.)
-20 0 20 40 60 80
Temperature (°C)
(A)
sec.
KASUGA ELECTRIC WORKS LTD
3-11 Shimorenjaku 8-Chome,
Mitaka Tokyo 181-8518, Japan
Tel: 0422-47-5881
Fax: 0422-44-6277
CONNECTION DIAGRAM
(A)
sec.
RAS 70 - 3
K L
1.1
1.0
1.1
1.0
Operating time (sec.)
Operating time (sec.)
K L
K L
K L
Operating time (sec.)
Power consumption (VA)
1.0
0.9
0.5
0.4
0.3
0.2
0.1
0
Exclusive Agent:
RASP18NB
Operating time-overcurrent
(1sec.)
100 200 300 400 500
Overcurrent (%)
CT power consumption
5 6 7
Current (A)
8 9
600 700
51 Kim Keat Road, Unit 05-02
Mun Hean Industrial Building, Singapore 328821
Tel: (65) 6250 0522 Fax: (65) 6253 6885/(65) 6253 5879
E-mail: munheansing@munhean.com.sg
Website: http://www.munheansingapore.com
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