Protection
- Too many starts
- Maximum start time
- Under current
- Load increase
- Thermal level (Overload) - Two Levels
- Over-current Jam / Stall & Short circuit - Two Levels
- Unbalanced current - Two Levels
- Directional Ground fault current
- Phase Sequence
- Temperature (3 Sensors)- RTD Pt.100 or
3 PTC/NTC Thermistor - Two Levels
- External fault 1- N.O/N.C contacts
- External fault 2 - N.O/N.C contacts
Inputs
- - 3 , 5A Phase C/T's (1A is also available)
- - 2 , Programmable Discrete inputs
- - 1 , Residual Ground Current Input
- - 1 , Open Delta Voltage Input
- - Control Voltage Supply (115,230VAC 50/60Hz,110VDC)
- - 3 , RTD/Thermistors
Outputs
- - 1 , Alarm Relay fail safe (8A/250V)
- - 1 , Trip Relay trip/trip-fail safe (8A/250V)
- - 2 , Programmable (8A/250V)
- - 1 , Programmable Analog Output
HMI
- - 2 Lines Illuminated LCD
- - 4 , LED's
Communication
- RS485 Serial Limk With Modbus / Profibus Protocol
at baud rate of 1200 to 9600 bit/sec
Actual Data
- - I 1 , I 2, I 3 Phase Currents
- - T 1 , T 2 , T 3 RTD's Temperatures
- - % of Motor FLC
- - Unbalance Current
- - I 0 Residual Current , 3V 0 Zero Sequence Voltage
- - Thermal Capacity
- - Time to Trip
- - Time to Start
Statistical Data
- - Last Start Period
- - Last Start Max. Current
- - Last Trip Thermal Level 2
- - Last Alarm Thermal Level 1
- - Trip I 1 , I 2 , I 3
- - Trip I 0 , 3V 0
- - Trip T 1 , T 2 , T 3
- - Total Run Time
- - Total Number of Starts
- - Total Number of Trips
Codes & Standards
Impulse :IEC 255-4 (1976) & Amend #1 (1979)
IEC 255-5 (1977)
5 kV common-mode test
5 kV transverse-mode test
Surge withstand :
Oscillatory 2.5 kV peak
Fast transient 4 kV crest voltage
In accordance with: ANSI C37.90.1 (1990), IEC 55-4 (1976)
Amend #1 (1979) Class III, IEC 255-22-2 (1988) Class III
RFI : In accordance with EMI standard ANSI C37.90.2
Technical Specification
Auxiliary Power Supply
110VDC.
Consult factory for 230VAC (165 - 260V), 115VAC (88 - 125V), (to be specify). 45 to 65Hz.
Power consumption: = 10VA
Current Measurement (three currents)
Method : True rms.
Range: 0.05 to 12 * phase CT Primary amps setting. Note: I1 is used to measure mains frequency. Lower (< 0.05) current may cause wrong
frequency measurement which may cause inaccurate currents and voltage measurements.
Full scale: 12 * phase CT Primary amps setting.
Accuracy : ± 1.5% , for 0.9 to 1.5 * CT Primary amps setting.
± 5% above 1.5 * CT Primary
± (3% + 0.02 * CT Primary) below 0.9 * CT Primary
Power consumption: = 0.1VA per 1A at 1Amp. input, (Input impedance = 100m ? )
= 0.5VA per 5A at 5Amp. input, (Input impedance = 20m ? )
Directional Ground Fault 3Vo measurement
Method : True RMS.
Rated input Voltage 110V / 190V.
Measurement Range : 5V to 30V. Measured with 200mA / 1.5mA ZCT.
Full scale: 30V.
Accuracy : ± 3% of full scale.
Input impedance: = 50K ?
Allowed input range: <= 220VAC (saturated, no damage)
Phase accuracy: ± 10 °
Directional Ground Fault Current measurement (ZCT primary current)
Method : True RMS.
Measurement Range : 0.1 to 1.0A at ZCT Primary, when measured with 200mA / 1.5mA ZCT.
0.75mA to 7.5mA at ZCT secondary.
Full scale: 1A (saturated, no damage).
Accuracy : ± 3% of full scale.
Input impedance: = 10 ?
Allowed input range: <= 1A at ZCT secondary (at relay input terminals).
Phase accuracy: ± 10 °
Thermistor Input RTD Input
Range: 0.1 - 30K ? . Range: 100 - 240 ? or 0 ° C - 250 ° C
Accuracy: ± 0.1K ? up to 5K ? , ± 3% above 5K ? . Accuracy: ± 3% of resistance.
Time delay: 2 Sec Max wire resistance: 25?.
Overload Alarm and Trip Curves (both heating and cooling)
Fault time accuracy: ± 1 Second up to 10 seconds.
± 1 second ± 2% above 10 seconds.
Threshold current level : OVERLOAD PICKUP ± 1.5%.
Total Run Time
Accuracy: ±2%.
Current Unbalance Alarm and Trip
Method: Unbalance = 100 * (Imax - Imin) / Ir [%]
Where: Imax = max. of the three phase currents.
Imin = min. of the three phase currents.
Ir = larger of (Imax , Motor FLC setting).
(to prevent nuisance tripping at low current levels) Alarm
Threshold unbalance alarm level: 50% of Unbalance Current setting ± 2%.
Alarm (fixed) time delay: 5.0 ± 0.5 Sec.
Trip Curves
Threshold unbalance trip Level: Unbalance Current setting ± 2%.
Trip time accuracy: ± 1 Second up to 10 seconds. ± 1 second ± 2% above 10 seconds.
Oredering Information
Dimensions
Typical Wiring Diagram
