The digital power meter GOBLIN is a micro-controller based unit which not only measures a host of electrical parameters to display them on a 128 x 64 backlit LCD, but also acts as a comprehensive load managing device due to its four numbers of output relay contacts. These outputs are individually field programmable for both the parameter on which to generate alarm as well as the values on which to activate alarm and deactivate it. In addition to this flexibility in terms of load management, the meter also has two serial ports: USB port and RS485. RS485 supports MODBUS RTU protocol for connections to EMS/SCADA. Goblin has two USB ports-one where a cable connection to laptop/pc is made(Device mode) and another where the unit directly accepts a pendrive(Host mode).
The unit is meant for use in three phase four wire / three wire systems. The installation type, CT ratios and PT ratios are site selectable.
The Load Manager with its four relay contacts can be used as a Demand Controller. The method of Demand calculation is sliding window and fixed window.
| Parameter | |||
|---|---|---|---|
| Type | Name | Statistics | |
| Input | Three Phases and Neutral of a3P4W system / Three Phases of a 3P3W system | ||
| Voltage | Direct Voltage Input: Up to 500V L-L, Up to 300VL-NPT Ratio: Site Selectable Burden: 0.5VA |
||
| Current | Secondary Current Input:5A or 1A (Site Selectable)CT Ratio: Site Selectable Range of Reading:5 - 5000A Burden: < 1.0VA Overload: 5A CT = 6A RMS Continuous 1ACT = 1.2A RMS Continuous |
||
| Power Supply | Auxiliary Supply: 90 - 480VAC, 50-60 Hz. | ||
| Output | Relay | Four. Individually Field Programmable. Switching Voltage: Max. 230 VAC Switching Power: Max. 1000W Expected Mechanical Life: >10 x 106 switching operations Expected Electrical Life: >4 x 106 switching operations @(Load = 200VA, Coscp = 0.5) |
|
| Measurment | True RMSBasicParameters | Voltage(Volts L-N & L-L) | Vl-n Accuracy: 0.5% of Reading Vl-l Accuracy : 1.0% of Reading |
| Current(Amps IR, IY, IB) | Accuracy: 0.25% of Reading | ||
| Line Frequency | 45 to 55 Hz, Accuracy: 0.3%of Reading | ||
| Power | ActivePower (P) | Accuracy: 0.5% of Reading(For IPFI>0.5) | |
| ReactivePower (Q) | Accuracy: 1.5% of Reading (Between 0.5 Lag to 0.8 Lead) |
||
| ApparentPower (S) | Accuracy: 0.5% of Reading | ||
| Power Factor | For Individual phases andSystem. Accuracy : 1.0% of Reading (IPFI>0.5) Range of Reading: 0.05 to1.00 Lag/Lead |
||
| Energy | Total ActiveEnergy (KWh) | Range of Reading : 0 to99999999.9 KWh Accuracy : Class 0.5 as per IS14697 |
|
| Total ApparentEnergy (KVAh) | Range of Reading : 0 to99999999.9 KVAh Accuracy : Class 0.5 as per IS14697 |
||
| Total ApparentEnergy (KVARh) | Range of Reading : 0 to99999999.9 KVARh Accuracy : Class 1.0 |
||
| Power Quality | 3rd to 15thHarmonics(Odd) for all Voltages with THD | ||
| 3rd to 15thHarmonics(Odd) for all Currents with THD | |||
| Demand | Active Power (KW) Demand -Sliding & Fixed, Selectable | ||
| Apparent Power (KVA) Demand -Sliding & Fixed, Selectable | |||
| Miscellaneous | Dimensions | Bezel | 144 X 144 mm |
| Panel Cutout | 138 X 138 mm | ||
| Depth of installation | 55 mm | ||
| Display | 128 X 64 graphical Backlit LCD | ||
| Operating temp | 10°C to 50°C | ||
| Weight | 0.65 Kgs (Approx.) | ||
| Communication | OperatingCurrent Range | 0.4% to 120% of CT primary | |
| Data LoggingBuffer | 2MB, Non-volatile memory,Can hold 19691 records | ||
| Logging Duration | Site selectable from 1 minute to 60 minutes | ||
| RS485 | Modbus-RTU protocol | ||
| USB port and directly access pen-drive | for downloading logged data | ||
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