Short-time Overcurrent Test Equipment is used to measure and analyze the influence of short-time overcurrents on energy meter. This test is described in various standards for energy meters such as IEC 62053, IS 13779 etc. As per CEI / IEC 62053, short-time overcurrents shall not damage the meter. The meter shall perform correctly when back to its initial working condition and the variation of error shall not exceed particular values specified on basis of the class of the energy meter. The Short-time Overcurrent Test Equipment is suitable for testing the influence of Short-time overcurrents on all types of energy meters that should confirm to or exceed the requirements of national and international standards. STOC 01/02/03 is appropriate for use by test laboratories, research & development centers & manufacturers for conformity assessment services, research and type testing. This test is mandatory for electronic and electromechanical energy meters supplied to energy distribution companies that insist listing of the meter by reputable assessment agencies. The STOC 01/02 briefly consists of a power circuit and a control panel. The power circuit feeds the ‘overcurrent’ to the UUT. The control panel provides the user interface to adjust the parameters as per the requirements of the standards and the UUT.
3 distinct models available as per the maximum range of the customer.
Output for oscilloscope.
Smart and user friendly phase control module
Easy mounting of energy meter
Sr.No | STOC 01 | STOC 02 | STOC 03 | |
---|---|---|---|---|
1 | Input Supply | Default: Three phase, 415V, 50Hz, +/- 10%, (40A max) | Default: Three phase, 415V, 50Hz, +/- 10%, (40A max) | Default: Three phase, 415V, 50Hz, +/- 10%, (100A max) |
2 | Output Current Range | 50 to 3000A variable, settable and isolated from mains. Two Ranges: 50 – 500A 100 – 3000A | 50 to 5000A variable, controlled, settable and isolated from mains. Two Ranges: 50 – 500A 100 – 5000A | 100 to 10000A variable, controlled, settable and isolated from mains. Two Ranges: 100 – 1000A 200 – 10000A |
3 | Output Current Setting | 150A to 3000A : 10ms. <500A : 500ms. | 150A to 5000A : 10ms. <500A : 500ms. | 200A to 10000A : 10ms. <1000A : 500ms. |
4 | Compliance Voltage | 5V. | 7V. | 7V. |
5 | Output Measurement | Through Transient Recording Meter Facility is provided to connect an oscilloscope to measure and set the desired output current. Two ranges provided: 0 – 500mV for 0 – 500A O/P Tap 0 – 300mV for 0 – 3000A O/P Tap | Through Transient Recording Meter Facility is provided to connect an oscilloscope to measure and set the desired output current. Two ranges provided: 0 – 300mV for 0 – 500A O/P Tap 0 – 300mV for 0 – 5000A O/P Tap | Through Transient Recording Meter Facility is provided to connect an oscilloscope to measure and set the desired output current. Two ranges provided: 0 – 300mV for 0 – 1000A O/P Tap 0 – 300mV for 0 – 10000A O/P Tap |
6 | Time Setting | 10ms to 1000ms. | 10ms to 1000ms. | 10ms to 1000ms. |
7 | Cycle Setting | 1 cycle / 99 cycles. | 1 cycle / 99 cycles. | 1 cycle / 99 cycles. |
Construction | Variac & Panel on Castor Wheels | Variac & Panel on Castor Wheels | Variac & Panel on Castor Wheels | |
8 | Protection | Fuse protection on primary Electronic Over Current Protection in Primary Circuit. Additional Time Limit for “Test ON” time. | Fuse protection on primary Electronic Over Current Protection in Primary Circuit. Additional Time Limit for “Test ON” time. | Fuse protection on primary Electronic Over Current Protection in Primary Circuit. Additional Time Limit for “Test ON” time. |
9 | Termination | Output current termination on bus bars to facilitate easy connection with Energy Meter current circuit terminals. Three bus bar, Common, 500A & 3000A are provided. | Output current termination on bus bars to facilitate easy connection with Energy Meter current circuit terminals. Three bus bar, Common, 500A & 5000A are provided. | Output current termination on bus bars to facilitate easy connection with Energy Meter current circuit terminals. Three bus bar, Common, 1000A & 10000A are provided. |
10 | Current Sensing | Through Shunt: 0 – 500mV for 0 – 500A Output. 0 – 300mV for 0 – 3000A Output. | Through Shunt: 0 – 300mV for 0 – 500A Output. 0 – 300mV for 0 – 5000A Output. | Through Shunt: 0 – 300mV for 0 – 1000A Output. 0 – 300mV for 0 – 10000A Output. |
As mentioned in the specifications column, there are three variants of the test system. PC based variant can also be customized
The test bench is designed to pass an overcurrent for a specific period controlled by a thyristor module and a specially designed transformer.