Comprehensive Measurement:
- All readings are True RMS measurements.
- Fast, real-time cycle by cycle measurement, at 80 samples/cycle
- Four quadrant readings (Power and Power Factor).
- Min. /Max. Values
- KVA and KW Demands
- Odd Harmonics upto 29th of individual Voltage and Current Waveforms including THD.
Installations & Connections:
- Single model accepts 3P4W and 3P3W connections.
- Site selectable 1A or 5A Ct secondary selection
- User selectable CT and PT Ratio
Data Logging:
- ON board 8 MB of Memory (2 MB in PowerCube).
- Log all Min./Max Values.
- Log all electrical parameters, real-time and integrated (energies and demands) and harmonics to get complete Energy system snap-Shot.
- Events Logging 4 Events can be programmed by the user for parameter, high-low, time delay and value.
Communication:
PowerCube has 2 Ports. RS-485 for connection to SCADA/EMS and RS-232 for downloading of logged data including Min. /Max. Events.
Saturn has 3 Ports. RS-485 for connection to SCADA/EMS, USB 2.0 for downloading of logged data and an Ethernet Port with TCP/IP protocol support for connection with LAN/Internet.
CONTROL:
There are 10 relays output in Saturn and 12 in PowerCube, which are more than just relay outputs. These relays can be used for Alarm/ Trip function or for PF Correction operation.
In case the relays are programmed to operate for Alarm/ Trip functions, each relay is independently programmable for the parameter on which to operate, time delay before operation, and value for the operation to be triggered and release value.
Programming some relay to operate on present Demand value, a MD control scheme can be accomplished.
In case of MD application, all relays can have independent operate and release limits. Thus in conjunction with the MD measurement in sliding window, fixed window or predictive modes, effective management of demand can be done.
In case of PF correction, user can select either standard FIFO or the intelligent VAR based mode. In VAR mode, capacitor bank sizes are sensed automatically by the unit through a function called Autosense.
Other Features:
User interface is via Touch Screen in Saturn and via Pushbutton Keys in PowerCube
Digital input (potential free contact), purpose of which can be selected at site. One is to have dual set-point operation in PF mode. Another is to have dual source Energy registration.
Graphics LC display 240 x 128 monochromes (B/W) in PowerCube and 320 x 240 colorful in Saturn. Graphical LCD makes it possible to display harmonic data in histogram waveforms of all voltages and currents.
Technical Specifications
| Parameter |
Mode |
| Type |
Name |
Statistics |
Symbol |
3P4W |
3P3W |
| True RMS Basic Parameters |
Voltage
(Volts L-N) |
Direct Voltage Input : 0 to 300 V AC
PT Ratio : Freely Programmable
up to 220 KV Range of Reading: 0.0 to 220 KV
Accuracy : 0.5% of Reading |
Vr |
 |
- |
| Vy |
|
| Vb |
|
Voltage
(Volts L-L) |
Direct Voltage Input: 0 to 510V AC
PT Ratio : Freely Programmable
up to 220 KV
Range of Reading: 0.0 to 220 KV Accuracy : 1.0% of Reading |
Vry |
|
|
| Vyb |
|
|
| Vbr |
|
- |
Current
(Amps Ir,
Iy, Ib) |
Secondary Current Input: 1A or 5A
CT Ratio : Freely Programmable
up to 9999 A Range of Reading: 0.00 to 9999A Accuracy : 0.25% of Reading |
Ir |
|
|
| Iy |
|
- |
| Ib |
|
|
Capacitor
Current
(Amps Ir,
Iy, Ib) |
Secondary Current Input: 1A or 5A
CT
Ratio: Freely Programmable up to 9999 A
Accuracy: 1.0% of Reading |
Ir |
|
|
| Iy |
|
- |
| Ib |
|
|
| Neutral Current |
Accuracy: 3% of Reading |
In |
|
- |
| Line Frequency |
45 to 55 Hz, Accuracy: 0.3% of Reading |
Hz |
|
|
| Power |
Active
Power (P) |
Accuracy: 1.0% of Reading
(Between 0.5 Lag to 0.8 Lead) |
(P)
R- Phase |
|
|
(P)
Y- Phase |
|
- |
(P)
B- Phase |
|
|
Reactive
Power (Q) |
Accuracy: 1.5% of Reading
(Between 0.5 Lag to 0.8 Lead) |
(Q)
R- Phase |
|
|
(Q)
Y- Phase |
|
- |
(Q)
B- Phase |
|
|
Apparent
Power (S) |
Accuracy: 1.0% of Reading |
(S)
R- Phase |
|
- |
(S)
Y- Phase |
|
- |
(S)
B- Phase |
|
- |
| Harmonic Active Power |
|
|
- |
| Fundamental Active Power |
|
|
- |
| Power Factor |
Accuracy: 1% of Reading (IPFI _> 0.5)
Range of Reading: 0.05 to 1.00 Lag/ Lead |
P
R-Phase |
|
- |
PF
Y-Phase |
|
- |
PF
B-Phase |
|
- |
| System PF |
|
|
| Energy |
Total Active
Energy (KWh) |
Range of Reading: 0 to 99999999.99 MWh
Accuracy: 1.0 S as per IS13779 |
|
|
|
Total Reactive Energy
(KVARh) |
Range of Reading: 0 to 99999999.99 MVARh
Accuracy: 1.5% of Reading (Between 0.5 Lag to 0.8 Lead) |
|
|
|
Total Apparent Energy
(KVAh) |
Range of Reading: 0 to 99999999.99 MVAh
Accuracy: 1.0% of Reading |
|
|
|
| Demand |
Active Power (KW) Demand - Sliding & Fixed Selectable |
KWDMND |
|
|
| Apparent Power (KVA) Demand - Sliding & Fixed Selectable |
KVADMND |
|
|
| Predictive Demand |
|
|
|
Power
Quality |
Harmonics for Voltages (3rd to 29th) |
|
|
|
| Harmonics for Currents (3rd to 29th) |
|
|
|
| THD for each voltage |
|
|
|
| THD for each current |
|
|
|
| Misc. |
Phase angles |
|
|
- |
| Cap. Bank KVAR |
|
|
|
| Run time |
|
|
|
Input Specifications
Supply
Three Phases and Neutral of a 3P4W system / Three phases of a 3P3W system
Voltage
Direct Voltage Input: Up to 510V L-L and 300V L-N
PT Ratio: Freely Programmable up to 220KV Site selectable
Range of Reading: 1-220KV
Burden: 0.5VA
Current
Secondary Current Input: 5A or 1A
Range of Reading: 0 -9999A
Burden: 1.0VA
Overload: 5A CT = 6A RMS Continuous, 1A CT = 5A RMS Continuous
Power Supply
Not needed. Unit has in-built 3 phase supply with an operating range of 60VAC - 480 VAC, 50-60 Hz.
Output Specifications
Programmable Relay Output
Relay outputs: 12(In PowerCube) & 10(In Saturn)
Relay rating: 5A @ 230 VAC, Resistive load
Communication
For PowerCube
- Standard RS485 port supporting MODBUS-RTU protocol, for integration with SCADA/EMS
- RS232C port for downloading logged data
For Saturn
- Standard RS485 port supporting MODBUS-RTU protocol, for integration with SCADA/EMS
- USB 2.0 port for downloading logged data
- An Ethernet Port With TCP/IP protocol support for connection with LAN/Internet
